1-Given a string and a string list, write a Python program to remove the string from the list and return the modified list.
Input [‘You','cannot','end','a','sentence','with','because','Because','because','is','a','conjunction.']
Output:
['You',
'cannot',
'end',
'a',
'sentence',
'with',
'Because',
'is',
'a',
‘conjunction.']
Explain your code.
2- Without using ‘from collections import Counter’. Write a Python program to combine values in a list of dictionaries.
Input : [{‘item’: ‘item1’, ‘amount’: 400},{‘item’: ‘item2’, ‘amount’: 300},{‘item’: ‘item1’, ‘amount’: 750}]
Output : {‘item1’: 1150, ‘item2’: 300}
Answers
1- To remove a specific string from a list, we can iterate over the elements of the list and check if each element matches the string to be removed. If a match is found, we skip that element using the `continue` statement. If no match is found, we add the element to a new list. Finally, we return the modified list without the removed string.
Here's an example code snippet to demonstrate this:
```python
def remove_string_from_list(string, string_list):
modified_list = []
for element in string_list:
if element == string:
continue
modified_list.append(element)
return modified_list
input_list = ['You', 'cannot', 'end', 'a', 'sentence', 'with', 'because', 'Because', 'because', 'is', 'a', 'conjunction.']
string_to_remove = 'because'
output_list = remove_string_from_list(string_to_remove, input_list)
print(output_list)
```
Explanation: The code defines a function `remove_string_from_list` which takes the string to be removed and the string list as input. It initializes an empty list `modified_list`. Then, it iterates over each element in the input list. If the element is equal to the string to be removed, it skips that element using `continue`. Otherwise, it adds the element to the `modified_list`. Finally, it returns the modified list.
2- To combine values in a list of dictionaries without using `Counter`, we can iterate over the dictionaries and update a new dictionary with the sum of the values for each unique key. If a key is encountered for the first time, we add it to the new dictionary with its corresponding value. If a key already exists in the new dictionary, we update its value by adding the current value.
Here's an example code snippet to achieve this:
```python
def combine_dictionary_values(dictionary_list):
combined_dict = {}
for dictionary in dictionary_list:
for key, value in dictionary.items():
if key in combined_dict:
combined_dict[key] += value
else:
combined_dict[key] = value
return combined_dict
input_list = [{'item': 'item1', 'amount': 400},
{'item': 'item2', 'amount': 300},
{'item': 'item1', 'amount': 750}]
output_dict = combine_dictionary_values(input_list)
print(output_dict)
```
Explanation: The code defines a function `combine_dictionary_values` which takes a list of dictionaries as input. It initializes an empty dictionary `combined_dict`. Then, it iterates over each dictionary in the input list. For each key-value pair in the dictionary, it checks if the key exists in the `combined_dict`. If the key already exists, it updates its value by adding the current value. If the key is encountered for the first time, it adds it to the `combined_dict` with its corresponding value. Finally, it returns the combined dictionary.
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Related Questions
Meredith implements a "graph coloring" algorithm, which comes up with colors for graph vertices such that no neighboring vertices share the same color.
The algorithm outputs graph colorings like this one:
Using a palette of just 3 colors, she runs the algorithm on graphs with varying amounts of vertices and records how long it takes.
Her findings are summarized in this table:
Graph vertices Steps
4 81
6 729
8 6561
Based on the table, which of the following statements describe the run time for this algorithm?
????️Note that there are 2 answers to this question.
Answers
The process of giving different colors to each vertex of a graph G so that no two neighboring vertices receive the same color is known as graph coloring.
What is Graph coloring algorithm?When coloring a graph, the goal is to use as few colors as possible. The chromatic number of a graph G is the lowest set of colors needed to color that graph. A NP Complete problem is the graph coloring issue.
A unique characteristic of a graph coloring is that two neighboring vertices, or those with an edge connecting them, cannot have the same color.
The difficulty stems from the fact that two countries (or states) must have distinct colors when they are close to one another when coloring a map. The United States is depicted on the following four-color map.
Therefore, The process of giving different colors to each vertex of a graph G so that no two neighboring vertices receive the same color is known as graph coloring.
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As an input signal drives the base voltage in a positive direction, base current will_____ and collector current will _____.
Answers
Answer:
Base current increases and collector current decreases
Explanation:
Base current increases and collector current decreases
The collector current does reduces because electrons that moves from emitter to base and the electrons that moves from collector to base are both cancelled out. Some of these electrons enter from the emitter to the collector because, in a way, the emitter has been heavily döped
An increase in base current also means that there is more bias to the transistor
Assignment 1: Structural Design of Rectangular Reinforced Concrete Beams for Bending
Perform structural design of a rectangular reinforced concrete beam for bending. The beam is simply supported and has a span L=20 feet. In addition to its own weight the beam should support a superimposed dead load of 0.50 k/ft and a live load of 0.65 k/ft. Use a beam width of 12 inches. The depth of the beam should satisfy the ACI stipulations for minimum depth and be proportioned for economy. Concrete compressive strength f’c = 4,000 psi and yield stress of reinforcing bars fy = 60,000 psi. Size of stirrups should be chosen based on the size of the reinforcing bars. The beam is neither exposed to weather nor in contact with the ground, meaning it is subjected to interior exposure.
• Use the reference on "Practical Considerations for Rectangular Reinforced Concrete Beams"
• Include references to ACI code – see slides from second class
• Include references to Tables from Appendix A
• Draw a sketch of the reinforced concrete beam showing all dimensions, number and size of rebars, including stirrups.
Answers
Answer:
Beam of 25" depth and 12" width is sufficient.
I've attached a detailed section of the beam.
Explanation:
We are given;
Beam Span; L = 20 ft
Dead load; DL = 0.50 k/ft
Live load; LL = 0.65 k/ft.
Beam width; b = 12 inches
From ACI code, ultimate load is given as;
W_u = 1.2DL + 1.6LL
Thus;
W_u = 1.2(0.5) + 1.6(0.65)
W_u = 1.64 k/ft
Now, ultimate moment is given by the formula;
M_u = (W_u × L²)/8
M_u = (1.64 × 20²)/8
M_u = 82 k-ft
Since span is 20 ft, it's a bit larger than the average span beams, thus, let's try a depth of d = 25 inches.
Effective depth of a beam is given by the formula;
d_eff = d - clear cover - stirrup diameter - ½Main bar diameter
Now, let's adopt the following;
Clear cover = 1.5"
Stirrup diameter = 0.5"
Main bar diameter = 1"
Thus;
d_eff = 25" - 1.5" - 0.5" - ½(1")
d_eff = 22.5"
Now, let's find steel ratio(ρ) ;
ρ = Total A_s/(b × d_eff)
Now, A_s = ½ × area of main diameter bar
Thus, A_s = ½ × π × 1² = 0.785 in²
Let's use Nominal number of 3 bars as our main diameter bars.
Thus, total A_s = 3 × 0.785
Total A_s = 2.355 in²
Hence;
ρ = 2.355/(22.5 × 12)
ρ = 0.008722
Design moment Capacity is given;
M_n = Φ * ρ * Fy * b * d²[1 – (0.59ρfy/fc’)]/12
Φ is 0.9
f’c = 4,000 psi = 4 kpsi
fy = 60,000 psi = 60 kpsi
M_n = 0.9 × 0.008722 × 60 × 12 × 22.5²[1 - (0.59 × 0.008722 × 60/4)]/12
M_n = 220.03 k-ft
Thus: M_n > M_u
Thus, the beam of 25" depth and 12" width is sufficient.
freshdirect's gives them a competitive advantage related to data which their rivals cannot match
Answers
FreshDirect has a competitive advantage when it comes to data which their rivals cannot match. FreshDirect has been using data analytics for more than a decade now to optimize their operations, improve customer experiences, and offer customized product recommendations. FreshDirect is known for its high level of customer service, which is due in part to its sophisticated data systems that help it anticipate and respond to customer needs quickly and effectively.
They can also monitor customer behavior in real-time to identify trends and preferences, which helps them tailor their product offerings and marketing campaigns to better appeal to customers. FreshDirect has also invested heavily in its supply chain, which is another area where data analytics can be extremely valuable. By using data analytics to track inventory levels, optimize delivery routes, and monitor supplier performance, FreshDirect is able to maintain a high level of operational efficiency and offer a wider range of products to customers. In conclusion, FreshDirect's investment in data analytics gives them a competitive advantage that their rivals cannot match.
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Inhalation is the most common way for a(n)
to enter the body.
electrical current
Information
Chemical
Water
Answers
inhalation is the most common way for chemical to enter the body
An exothermic reaction releases 146 kJ of heat energy and 3 mol of gas at 298 K and 1 bar pressure. Which of the following statements is correct?
A) ΔU=-138.57 kJ and ΔH=-138.57 kJ
B) ΔU=-153.43 kJ and ΔH=-153.43 kJ
C) ΔU=-138.57 kJ and ΔH=-146.00 kJ
D) ΔU=-153.43 kJ and ΔH=-146.00 kJ
Answers
Answer:
D) ΔU = -153.43 kJ and ΔH = -146.00 kJ
Explanation:
Given;
heat energy released by the exothermic reaction, ΔH = -146 kJ
number of gas mol, n = 3 mol
temperature of the gas, T = 298 K
Apply first law of thermodynamic
Change in the internal energy of the system, ΔU;
ΔU = ΔH- nRT
where;
R is gas constant = 8.314 J/mol.K
ΔU = -146kJ - (3 x 8.314 x 298)
ΔU = -146kJ - 7433 J
ΔU = -146kJ - 7.433 kJ
ΔU = -153.43 kJ
Therefore, the enthalpy change of the reaction ΔH is -146 kJ and change in the internal energy of the system is -153.43 kJ
D) ΔU = -153.43 kJ and ΔH = -146.00 kJ
How do i untange my headphone cords? If you give me a good answer i will mark u brainliest
Answers
Answer:
scissors best way 100%
Explanation:
A conceptual issue can be resolved by which of the following?
Answers
Answer:
Investigation or empircial research
Explanation:
gimme brainliest pls
The yield stress of a steel is 250Mpa. A steel rod used for implant in a femurneeds to withstand 29KN. What should the diameter of the rod be not to deform
Answers
Answer:
r = 1.922 mm
Explanation:
We are given;
Yield stress; σ = 250 MPa = 250 N/mm²
Force; F = 29 KN = 29000 N
Now, formula for yield stress is;
σ = F/A
A = F/σ
Where A is area = πr²
Thus;
r² = 2900/250π
r² = 3.6924
r = √3.6924
r = 1.922 mm
The radiation meter is showing radiation 2x as much as background. Is this a hot zone? If so why or why not?
Answers
Answer:
This is not a clear indication of the hot zone as the information of the radioactivity of the background is not provided clearly.
Explanation:
According to IAEA as well as NRCP, the hot area is defined on the basis of the radioactivity reading it shows instead of contrast or comparative reading from the background. The value of radiation activity which will be required to declare an area as hot zone is if it is greater than 0.1 mSv/h or \(1.5091\times 10^{29} kg^{-1} s^{-1}\).
A homeowner consumes 260 kWh of energy in July when the family is on vacation most of the time. Determine the average cost per kWh for the month using the following residential rate schedule: Base monthly charge of $10.00. First 100 kWh per month at 16 cents/kWh. Next 200 kWh per month at 10 cents/kWh. Over 300 kWh per month at 6 cents/kWh.
Answers
Answer:
16.2 cents
Explanation:
Given that a homeowner consumes 260 kWh of energy in July when the family is on vacation most of the time.
Where Base monthly charge of $10.00. First 100 kWh per month at 16 cents/kWh. Next 200 kWh per month at 10 cents/kWh. Over 300 kWh per month at 6 cents/kWh.
For the first 100 kWh:
16 cent × 100 = 1600 cents = 16 dollars
Since 1 dollar = 100 cents
For the remaining energy:
260 - 100 = 160 kwh
10 cents × 160 = 1600 cents = 16 dollars
The total cost = 10 + 16 + 16 = 42 dollars
Note that the base monthly of 10 dollars is added.
The cost of 260 kWh of energy consumption in July is 42 dollars
To determine the average cost per kWh for the month of July, divide the total cost by the total energy consumed.
That is, 42 / 260 = 0.1615 dollars
Convert it to cents by multiplying the result by 100.
0.1615 × 100 = 16.15 cents
Approximately 16.2 cents
A spherical tank with a radius of 0.25 m is filled with water (ρ = 1000 kg/m3). Calculate the mass and weight of the water in SI units.
Answers
The mass of the water is 65.5 kg. The weight of the water is 641.9 kgm/s²
What is the mass of a spherical tank?The mass of a spherical tank is the space contained in the tank. The mass of the spherical tank can be determined by first finding the volume of the tank, then using the relation of density, mass, and volume to find the mass.
From the given parameter:
The radius of the tank = 0.25 mThe density of the water = 1000 kg/m³The volume of the tank can be determined by using the formula:
\(\mathbf{V = \dfrac{4}{3}\pi r^3}\)
\(\mathbf{V = \dfrac{4}{3}\pi (0.25)^3}\)
V = 0.0655 m³
Using the relation that:
\(\mathbf{Density = \dfrac{mass}{volume}}\)
\(\mathbf{1000 \ kg/m^3= \dfrac{mass}{0.0655 \ m^3}}\)
mass = 1000 kg/m³ × 0.0655 m³
mass = 65.5 kg
The weight of the water can be determined by using the formula:
Weight = mass × gravity (i.e. acceleration due to gravity)
Weight = 65.5 kg × 9.8 m/s²
Weight = 641.9 kgm/s²
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The mass of the water in spherical tank is 65.4kg.
The weight of the water in spherical tank is 640.8 Newtons.
Given the data in the question:
Radius of the spherical tank; \(r = 0.25m\)Density of water; \(p = 1000kg/m^3\)Mass of water; \(m_w = \ ?\)
Weight of water; \(Ww = \ ?\)
DensityDensity \(p\) is simply the measure of the compactness of the mass of a substance. It is expressed as;
\(Density = \frac{Mass}{Volume}\)
To determine the mass and weight of the water in spherical tank,
we calculate the Volume of the spherical tank.
\(V = \frac{4}{3}\pi r^3\)
We substitute in our given values
\(V = \frac{4}{3} * \pi * (0.25m)^3\\ \\V = \frac{4}{3} * \pi * 0.015625m^3\\\\V = 0.0654 m^3\)
Now, we calculate the mass of the water; using the expression above.
\(Density = \frac{Mass}{Volume}\\Mass = Density * Volume\\\)
We substitute in our values
\(Mass = 1000kg/m^3 \ *\ 0.0654m^3\\\\Mass = 65.4kg\)
Hence, the mass of the water in spherical tank is 65.4kg.
Next we calculate the Weight which is expressed as;
\(Weight = mass\ *\ Acceleration\ of\ gravity\)
Where acceleration of gravity \(g = 9.8m/s^2\)
We substitute in our values
\(Weight = 65.4kg * 9.8m/s^2\\\\Weight = 640.8kgm/s^2\\\\Weight = 640.8N\)
Therefore, the weight of the water in spherical tank is 640.8 Newtons.
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an engineering firm is evaluating a sophisticated $80,000 laser system to measure the difference in water level between two large tanks. it is important that small differences be measured accurately. you suggest that the job can be done with a $200 manometer arrangement. an oil that is less dense than water can be used to give a 10:1 amplification of meniscus movement: a small difference in level between the tanks will cause 10 times as much deflection in the oil levels in the manometer. determine the specific gravity of the oil required for 10:1 amplification.
Answers
The specific gravity of the oil required for 10:1 amplification is 0.9.
Determine the specific gravity of the oilThe theory used in this question is the specific gravity of a substance, which is the ratio of the density of a substance to the density of water.
Explanations given below
Step 1: Calculate the specific gravity of the oil by dividing the density of the oil by the density of water.
Step 2: Multiply the specific gravity by 10 to get the amplification factor.
Step 3: Divide the desired amplification factor (10) by the calculated specific gravity to get the required specific gravity of the oil.
Example:
Desired amplification factor = 10
Calculated specific gravity = 0.9
Required specific gravity of the oil = 10 / 0.9 = 0.9
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Magnetic motor starters include overload relays that detect ____________ passing through a motor and are used to switch all types and sizes of motors.
Answers
Magnetic motor starters include overload relays that detect current passing through a motor and are used to switch all types and sizes of motors.What are Magnetic motor starters?A magnetic starter is a contactor that is designed to start and stop an electric motor.
It includes a magnetic coil that provides an electromechanical force. When electrical power is applied to the coil, a magnetic field is created. The contactor is drawn down by this magnetic force, and its contacts are closed. When power is cut off to the coil, the contactor is released, and its contacts open.How do Magnetic motor starters work?Magnetic motor starters work by using an electromagnet to energize a set of contacts. The electromagnet is fed by an external circuit, and when it receives the appropriate current, it creates a magnetic field.
The magnetic field then causes a set of contacts to close, completing the circuit to the motor. When the current to the electromagnet is stopped, the magnetic field collapses, and the contacts are opened, breaking the circuit to the motor. The overload relay protects the motor from damage by detecting when there is too much current flowing through the motor.
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Calculate the areas under the stress-strain curve (toughness) for the materials shown in Fig. below, (a) plot them as a
function of temperature, and describe your observations. (b) As expected, the elastic modulus of the polymer decreases as
temperature increases. Using the stress-strain curves in the figure, make a plot of the modulus of elasticity versus the
temperature. Comment on the shape of the curve.
Answers
Answer:
Explanation:
Wow
describe the typical ways of communicating technical information (such as sketches, test and inspection reports, work planning documents), and the amount of detail that should be included
Answers
Answer:
The most common and well known of these documents are memos and emails, which are used in every type of business. In addition to this, technical communicators also create instructions, product guides and documentation, graphs, charts, images, videos, and other forms of content.
There are many ways to communicate
technical information,
1. Planning sheet- describe the process - this
shows steps on how to make your drill drift-
telling us how us how to make it.
2.Drawings- this tells you the dimensions, size
of component/workpiece
Inspection sheets- check the measurements
are within given tolerances, this shows us
you've made it within those tolerances.
Instructions/ images of how to make your.
Leather palm gloves can protect your hands from what hazards
Answers
Answer:
They protect the entire hand from abrasion and punctures, and are a dependable, comfortable glove for a wide variety of jobs. Drivers' gloves are available in various types of leathers and can be unlined or lined for cold weather. Leather palm gloves provide maximum protection against abrasive and puncture hazards.
Gloves with leather palms offer the best defense against abrasive and puncture risks. They have leather palms and fingers and are constructed of dependable cotton or canvas.
What is abrasive?Abrasive is defined as a substance, sometimes a mineral, used to shape or polish a product by rubbing, which causes some of the workpiece to be removed due to friction. Abrasives are a particular kind of extremely hard material that are utilized in a variety of residential, industrial, and technological applications. A portion of the work piece is worn away when the abrasive is rubbed against it.
These leather gloves each offer particular levels of comfort, protection, and durability. Some of these leather gloves are suitable for use by those handling dangerous chemicals and sparks. Some can provide cut protection to an extreme degree. For workers who handle heat and water, certain types of leather gloves are recommended.
Thus, gloves with leather palms offer the best defense against abrasive and puncture risks. They have leather palms and fingers and are constructed of dependable cotton or canvas.
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how can you best limit cell phone distractions while driving
Answers
Remove your phone from reach. If you can't reach your phone, it's hard to use, so put it somewhere out of the way, like the glove compartment. Utilize the audio navigation systems.
How can distracted drivers be handled in the most effective manner?
Either slow down and allow the distracted driver to pull ahead of you or try to get ahead of them. Call 911 to voice your concern if you are unable to escape the distracted driver. Report the driver's behavior when calling 911, not just that they are texting. Always involve the police, not vigilantism.
How can we lower the danger posed by mobile phones?To put more distance between your head and the phone, use speaker mode, headphones, or ear buds. Make calls only when there is a weak signal because doing so causes cell phones to increase their RF transmission power. Think about texting instead of talking, but don't do it while driving.
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what is linear programming and provide examples of the use of
it, please :)
thank you :)
Answers
Linear programming is a mathematical method used to find the best possible outcome in a given situation, subject to certain constraints It involves optimizing a linear objective function
which is a mathematical representation of a goal, such as maximizing profit or minimizing costs, while considering linear constraints, which are limitations or restrictions on the decision variables Production Planning: A company wants to determine the optimal production levels for different products to maximize profit. Linear programming can be used to allocate limited resources, such as labor and raw materials, to different products, while satisfying demand and capacity constraints.
A shipping company needs to determine the most efficient way to transport goods from multiple origins to multiple destinations, while minimizing transportation costs. Linear programming can be used to optimize the allocation of goods to different routes, taking into account capacity restrictions and transportation cost An investor wants to allocate funds across different assets, such as stocks, bonds, and commodities, to maximize the return on investment while considering risk. Linear programming can be used to determine the optimal allocation of funds to different assets, taking into account expected returns, risk levels, and investment constraints.
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in a high pass filter, the cutoff frequency is affected only by the input resistor value not the feedback group of answer choices true false
Answers
Answer: true
Explanation: Cutoff frequency = 1/(2 *pi* R1*C) hence the cutoff frequency depends only on inpur resistance…
The claim that "in a high pass filter, the cutoff frequency is affected only by the input resistor value" is incorrect.
The statement "in a high pass filter, the cutoff frequency is affected only by the input resistor value" is FALSE. A high-pass filter is an electronic circuit that enables high-frequency signals to pass while suppressing low-frequency signals. A high-pass filter is typically used to remove the DC component of an audio signal. The high-pass filter is made up of a capacitor and a resistor that are linked in series.When the input voltage rises above the capacitive reactance (Xc), which is inversely proportional to frequency, the high-pass filter will only allow frequencies higher than the cutoff frequency (fc) to pass. The cutoff frequency is determined by the circuit's values of R and C; a larger value for either component will result in a lower cutoff frequency. When a frequency is greater than the cutoff frequency, the high-pass filter works as a low impedance path to ground.In a high-pass filter, the cutoff frequency is influenced by both the input resistor value and the feedback resistor value. As the feedback resistor value increases, the filter's cutoff frequency decreases, and vice versa.
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The volume of 1.5 kg of helium in a frictionless piston-cylinder device is initially 6 m3. Now, helium is compressed to 2 m3 while its pressure is maintained constant at 200 kPa. Determine the initial and final temperatures of helium, as well as the work required to compress it, in kJ.
Answers
Answer:
The initial temperature will be "385.1°K" as well as final will be "128.3°K".
Explanation:
The given values are:
Helium's initial volume, v₁ = 6 m³
Mass, m = 1.5 kg
Final volume, v₂ = 2 m³
Pressure, P = 200 kPa
As we know,
Work, \(W=p(v_{2}-v_{1})\)
On putting the estimated values, we get
⇒ \(=200000(2-6)\)
⇒ \(=200000\times (-4)\)
⇒ \(=800,000 \ N.m\)
Now,
Gas ideal equation will be:
⇒ \(pv_{1}=mRT_{1}\)
On putting the values. we get
⇒ \(200000\times 6=1.5\times 2077\times T_{1}\)
⇒ \(T_{1}=\frac{1200000}{3115.5}\)
⇒ \(=385.1^{\circ}K\) (Initial temperature of helium)
and,
⇒ \(pv_{2}=mRT_{2}\)
On putting the values, we get
⇒ \(200000\times 2=1.5\times 2077\times T_{2}\)
⇒ \(T_{2}=\frac{400000}{3115.5}\)
⇒ \(=128.3^{\circ}K\) (Final temperature of helium)
It's the law. Under New York law, you can get a citation for riding your bike while listening to music using headphones or earbuds in both ears. It is lawful, however, to listen to music with only one earbud keeping the other ear free.
Sensory deprivation. One of the main ways that people alert each other to danger on the road is through sound. Whether it's honking, yelling or ringing a bicycle bell, you're less likely to hear any of these warnings if you're listening to music putting you at higher risk of an accident.
Decreased attention. The more stimuli you have to contend with, the more difficult it is to dedicate your full attention to one particular task. If you get caught up in a song or story you're listening to while cycling, it can increase your distractibility which could have disastrous consequences.
The majority of cycling-related accidents involve a cyclist and a motor vehicle. Not surprisingly, the injuries a cyclist suffers in such collisions tend to be disproportionately serious and often fatal. Therefore, if you're cycling in traffic, foregoing the headphones can prove to be a life-saving decision.
Answers
Answer:s
Explanation:s
It's the law. Under New York law, you can get a citation for riding your bike while listening to music using headphones or earbuds in both ears. It is lawful, however, to listen to music with only one earbud keeping the other ear free.
Sensory deprivation. One of the main ways that people alert each other to danger on the road is through sound. Whether it's honking, yelling or ringing a bicycle bell, you're less likely to hear any of these warnings if you're listening to music putting you at higher risk of an accident.
Decreased attention. The more stimuli you have to contend with, the more difficult it is to dedicate your full attention to one particular task. If you get caught up in a song or story you're listening to while cycling, it can increase your distractibility which could have disastrous consequences.
The majority of cycling-related accidents involve a cyclist and a motor vehicle. Not surprisingly, the injuries a cyclist suffers in such collisions tend to be disproportionately serious and often fatal. Therefore, if you're cycling in traffic, foregoing the headphones can prove to be a life-saving decision.
The use of concrete was revolutionary since it could
a. Create buildings that could withstand weather
b. Create buildings that could be shaped different ways
c. Create roads that would not be broken as easily
d. Create a new ground level over old buildings
Answers
The use of concrete in construction was indeed revolutionary for several reasons, one of which was its ability to create a new ground level over old buildings. Before concrete, buildings were typically built on top of each other, leading to unstable and unsafe structures. However, with the invention of reinforcement concrete, architects and engineers were able to construct new floors and foundations without the need to demolish existing buildings.
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El tiempo hasta que falle un sistema informático sigue una distribución Exponencial con media de 600hs. (Utilice 3 decimales para sus respuestas) Si el sistema ha estado funcionando sin fallas durante 400hs ¿cuál es la probabilidad de que funcione por lo menos 200hs más?
Answers
Answer:
La probabilidad pedida es \(0.717\)
Explanation:
Primero comencemos definiendo la variable aleatoria. Para nuestro problema, la variable aleatoria es la siguiente :
\(X:\) '' El tiempo (en horas) hasta que falle un sistema informático ''
La variable aleatoria \(X\) será entonces una variable aleatoria continua.
Sabemos que sigue una distribución exponencial con una media de 600 hs.
Esto se escribe :
\(X\) ~ ε ( λ ) (I)
En donde λ es igual a la inversa de la media. Esto se escribe :
λ \(=\frac{1}{E(X)}\)
En donde \(E(X)\) es la media de la variable. Por ende, si reemplazamos los datos del ejercicio obtenemos ⇒
λ \(=\frac{1}{E(X)}\) ⇒ λ \(=\frac{1}{600}\)
Si reemplazamos el valor de λ en (I) obtenemos :
\(X\) ~ ε \((\frac{1}{600})\)
La función de distribución de \(X\) (por ser una variable aleatoria exponencial) es :
\(F_{X}(x)=P(X\leq x)=\) 1 - e ^ ( - λx) con x > 0 y \(F_{X}(x)=0\) en caso contrario.
Si reemplazamos el valor de λ en la función de distribución de \(X\) obtenemos :
\(F_{X}(x)=P(X\leq x)=1-e^{-\frac{x}{600}}\)
Dado que la variable aleatoria \(X\) se distribuye de manera exponencial, el hecho de saber que el sistema ha estado funcionando sin fallas durante 400 hs no nos aporta ninguna información sobre lo que ocurrirá después. Esta característica se conoce como propiedad de perdida de memoria de la variable aleatoria exponencial. Entonces, la probabilidad pedida se reduce a calcular :
\(P(X>200)\)
Dado que saber que el sistema ha estado funcionando sin fallas durante 400 hs no nos dice nada sobre lo que ocurrirá instantes posteriores a esas 400 hs.
Calculamos entonces la probabilidad pedida :
\(P(X>200)=1-P(X\leq 200)=1-F_{X}(200)=1-(1-e^{-\frac{200}{600}})=e^{-\frac{1}{3}}=0.717\)
which of the following situations is sufficient to represent current demand for a car?
Answers
The situation that is sufficient to represent the current demand for a car is an increase in car sales.
An increase in car sales indicates a higher demand for cars in the market. When more consumers are purchasing cars, it suggests a desire and willingness to buy vehicles, reflecting the current demand for cars. The increased sales volume demonstrates a demand for cars from the perspective of consumers.
Other factors that can provide insights into the current demand for cars include:
1. Consumer preferences: Analyzing trends and preferences in car models, features, and specifications can help gauge the current demand for specific types of cars.
2. Market research and surveys: Conducting surveys and market research studies can gather data on consumers' intentions to purchase cars, their budget considerations, and their reasons for buying or not buying.
3. Waiting lists and pre-orders: If there are extensive waiting lists or pre-orders for specific car models, it indicates a strong demand for those vehicles.
4. Inventory levels: Monitoring inventory levels at dealerships and manufacturers can provide indications of demand. Low inventory levels might suggest high demand, while high inventory levels could indicate lower demand.
By considering these factors, including an increase in car sales, one can gain a better understanding of the current demand for cars in the market.
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An ADC employing a 1000-level quantizer is used to convert an analogue signal that with bandwidth 20 kHz to binary format. Determine the minimum bit rate from this ADC.
Answers
To determine the minimum bit rate of an ADC (Analog-to-Digital Converter) with a 1000-level quantizer and a bandwidth of 20 kHz, the minimum bit rate from this ADC is 400 kHz.
In this case, the signal has a bandwidth of 20 kHz, so the minimum sampling rate required is 2 times the bandwidth, which is 2 * 20 kHz = 40 kHz. The minimum sampling rate corresponds to the minimum bit rate.
To convert an analogue signal with a 20 kHz bandwidth to a binary format using a 1000-level quantizer, each level of the quantizer requires a certain number of bits. Since there are 1000 levels, we need at least log2(1000) bits to represent each level. Rounded up to the nearest integer, log2(1000) is 10.
Therefore, the minimum bit rate of the ADC is the product of the minimum sampling rate and the number of bits per sample:
Minimum bit rate = Minimum sampling rate * Number of bits per sample
= 40 kHz * 10 bits
= 400 kHz
Hence, the minimum bit rate from this ADC is 400 kHz.
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When the value of the output cannot be determined even if the value of the controllable input is known, the model is:_________
a. analog.
b. digital.
c. stochastic.
d. deterministic.
Answers
Answer:
c. stochastic.
Explanation:
A stochastic model is a tool in statistics, used to estimate the probability distributions of intended outcomes by the allowance of random variation in any number of the inputs over time. For a stochastic model, Inputs to a quantitative model are uncertain, and the value of the output from a stochastic model cannot be easily determined, even if the value of the input that can be determined is known. The distributions of the resulting outcomes of a stochastic model is usually due to the large number of simulations involved, and it is widely used as a statistical tool in the life sciences.
Which of the following is NOT a factor that contributes to the annual cost to own an automobile
a
vehicle color
b
repairs
c
fuel
d
maintenance
Answers
Answer:
a. vehicle color
Explanation:
One might expect that the cost of owning a vehicle would not be a function of its color. There is no reason to believe that a blue car gets better gas mileage than a green car of the same make, model, and equipment. So, the appropriate choice is ...
a. vehicle color
__
However, vehicle color may play a role in ownership costs if more money is spent on washing a white car than would be spent on a black or beige car. Similarly, a light-colored car may require less use of an air-conditioner in the summer sun than does a dark-colored car, ultimately affecting fuel cost. It isn't always obvious what the features of a vehicle are that contribute to ownership cost.
Sadie is the props manager for a small community theater. Because she does not have a part onstage, Sadie is not part of the Performing Arts pathway of the Arts, AV Technology and Communication cluster.
True
False
Answers
Answer:
I think it is false!
Explanation:
Answer: I think it's true
Explanation:
Because if you were part of a play, you would have a part but if you work on props, you don't have a part onstage.
An electric, pipe-threading machine rotates, cuts, thread, and _____
Answers
An electric pipe-threading machine rotates, cuts, threads, and reams pipes to prepare them for proper connections and installations.
An electric pipe-threading machine is a versatile and essential tool used in various industries, such as plumbing, construction, and manufacturing. The primary purpose of this machine is to process and prepare pipes for installation by performing four critical operations: rotating, cutting, threading, and reaming. Rotating the pipe holds it securely in place while the other processes occur.
Cutting adjusts the pipe to the desired length. Threading creates grooves or threads on the outer surface of the pipe to enable secure connections with other threaded components. Lastly, reaming removes burrs and smooths the inner surface of the pipe, ensuring proper flow of liquids or gases and preventing leaks. This machine significantly speeds up pipe preparation and ensures a high degree of accuracy and uniformity in pipe connections.
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