6.6.1 [10] Assume that we are going to compute C on both a single core shared memory machine and a 4-core shared-memory machine. Compute the speedup we would expect to obtain on the 4-core machine, ignoring any memory issues.
6.6.2 [10] Repeat Exercise 6.6.1, assuming that updates to C incur a cache miss due to false sharing when consecutive elements are in a row (i.e., index i) are updated.
Answers
In Exercise 6.6.1, we need to compute the speedup that we would expect to obtain on a 4-core shared-memory machine as compared to a single-core shared memory machine while computing C. We can calculate the speedup using the following formula:
Speedup = T(single core) / T(4-core)
Here, T(single core) is the time taken to compute C on a single-core shared-memory machine, and T(4-core) is the time taken to compute C on a 4-core shared-memory machine.
Assuming that the workload is evenly distributed among all the cores, we can expect a speedup of 4. In other words, the 4-core shared-memory machine will compute C four times faster than the single-core shared-memory machine.
However, in Exercise 6.6.2, we need to assume that updates to C incur a cache miss due to false sharing when consecutive elements are in a row. False sharing occurs when two or more threads access different variables that share the same cache line. In this case, if two threads try to update consecutive elements in the same row of matrix C, they will end up accessing the same cache line, resulting in cache misses and increased overhead.
As a result of false sharing, the performance of the 4-core shared-memory machine will degrade. The speedup will be less than 4, but it is difficult to estimate the exact value without additional information. It is important to note that false sharing is a common issue in parallel computing, and developers need to take measures to avoid it to achieve optimal performance.
For such more question on variables
https://brainly.com/question/28248724
#SPJ11
The speedup we would expect to obtain on the 4-core machine would be less than 4, depending on the extent of false sharing that occurs.
For 6.6.1, assuming that there is no memory issue, we would expect to get a speedup of 4 on the 4-core shared-memory machine compared to the single-core shared memory machine. This is because with 4 cores, we can divide the work into 4 equal parts and execute them simultaneously, reducing the overall execution time.
For 6.6.2, assuming that updates to C incur a cache miss due to false sharing when consecutive elements in a row are updated, we would expect to get a smaller speedup on the 4-core shared-memory machine compared to the single-core shared memory machine. This is because false sharing can cause cache thrashing, which slows down the overall execution time.
To learn more about 4-core Here:
https://brainly.com/question/31961751
#SPJ11
Related Questions
1. A thin-walled cylindrical pressure vessel is capped at the end and is subjected to an internal pressure (p). The inside diameter of the vessel is 6 ft and the wall thickness is 1.5 inch. The vessel is made of steel with tensile yield strength and compressive yield strength of 36 ksi. Determine the internal pressure required to initiate yielding according to (a) The maximum-shear-stress theory of failure, and (b) The maximum-distortion-energy theory of failure, if a factor of safety (FS) of 1.5 is desired.
Answers
The standard procedure for dimensioning the location of a house on a site is to dimension ____ of the house from adjacent lot lines. A one side b two sides c two corners d one corner
Answers
Answer:
One corner ( D )
Explanation:
when dimensioning the location of a house on site the standard and the acceptable procedure is to ; Dimension One corner of the house
Adjacent lots is a term used to describe parcels of the site that meet each other along their boundary lines. and they also include parcels that may be separated by streets
Assume the address of name is 10 and the address of x is 14. (that is, name is stored in memory location 10, and x is stored in memory location 14.) problems 10—13 refer to the following statements:
int name, x=20.5;
int *a = &x;
...
name = *a;
Answers
I understand you need an explanation regarding the given code snippet that involves pointers, memory addresses, and variable assignments. Here's a concise overview of the code:
First, we have two integer variables, 'name' and 'x'. 'x' is assigned a value of 20.5, but since it's an integer, the decimal part will be truncated, and 'x' will store the value 20. The memory addresses for 'name' and 'x' are 10 and 14, respectively.
Next, we have a pointer 'a' of integer type. The pointer 'a' is assigned the address of 'x', which is 14. Therefore, 'a' points to the memory location of 'x'.
Finally, the value stored in the memory location pointed to by 'a' is assigned to 'name'. Since 'a' points to the memory location of 'x', the value of 'x' (20) is assigned to 'name'.
In summary, the code creates two integer variables 'name' and 'x', with 'x' storing the value 20. An integer pointer 'a' is assigned the address of 'x'. Then, the value stored in the memory location pointed to by 'a' (which is the value of 'x') is assigned to 'name'. After the execution of this code, both 'name' and 'x' will have the value 20.
Learn more about variable here
https://brainly.com/question/28248724
#SPJ11
The given code extracts two variables, namely, "name" and "x," along with their corresponding addresses of 10 and 14.
What next does the code do?Next, a reference variable named "a" is declared and initialized with the memory location of "x" (represented by &x). In conclusion, by using the pointer "a" (*a), the value of "x" is allocated to the variable "name". Consequently, "name" will have a value of 20.
The code initializes "x" with the value 20.5 and creates a pointer "a" pointing to "x". The value of "x" is then assigned to "name" using the dereference operator, so "name" will also have the value 20.5.
Read more about programs here:
https://brainly.com/question/26134656
#SPJ4
Mechames of Machines Two identical rollers, each of weight Q = 100N are supported by an inclined plane and vertical wall. Assuming smooth surfaces, find the reaction inclined at the point of support A, B and C
Answers
Explanation:
Since the rollers are identical and the surfaces are smooth, the reaction forces at points A and C must be equal and vertical.
Let's call this force R. At point B, the reaction force is perpendicular to the inclined plane, so we can use trigonometry to find its magnitude.
Let's call this force T. Using the forces in the vertical direction, we can write: 2R + T = 2Q Using the forces in the horizontal direction
we can write: T = R tanθ where θ is the angle of inclination of the plane. Substituting the second equation into the first, we get: 2R + R tanθ = 2Q Simplifying: R (2 + tanθ) = 2Q R = 2Q / (2 + tanθ)
Plugging in the values: R = 2(100N) / (2 + tanθ) We can use trigonometry to find the value of tanθ: tanθ = opposite / adjacent = BC / AB
Since the rollers are identical, BC = AB, so: tanθ = AB / AB = 1 Therefore, R = 2(100N) / (2 + 1) = 50N and T = R tanθ = 50N * 1 = 50N
So the reaction forces at points A and C are both equal to 50N and vertical, while the reaction force at point B is equal to 50N and perpendicular to the inclined plane.
Font
Paragraph
Styles
Editing
(1) What are the available methods for crop establishments in the field?
(2) Give a conceptual sketch for a seeder to establish soybean seeds in an
agricultural field of dry zone in Sri Lanka (Use software where
necessary/or a hand sketch with detail).
(3) Discuss the advantages of the seed dibbling mechanism and list the
crops that can be used dibbler.
A
(4) Discuss the key points to enhance agricultural productivity using the
fertilizer applicators.
(5) Calculations: Calibration of a seed drill
Number of furrows = 5
Spacing between the furrows = 8 cm
Diameter of the ground wheel = 0.65 m
Number of rotations of the ground wheel = 300
Weight of seed collected = 20 kg
Calculate the seed rate in kg/ha
The average number of seeds dropped per one revelation =6
Calculate the
(1) seed rate and
(ii)
hole to hole spacing
Answers
Answer:
1) Therefore it was so much more than one answer my headin an oodbms, a( n) _____ is a set of related attributes along with the actions that are associated with the set of attributes.
Answers
In an OODBMS, a(n) object is a set of related attributes along with the actions that are associated with the set of attributes.
Objects are the fundamental building blocks of an OODBMS and can represent anything from simple data types such as integers and strings, to complex real-world entities such as customers, orders, and products. Each object has a unique identity, state, and behavior, and can communicate with other objects through methods or messages. Object-oriented programming languages such as Java and Python provide support for defining and manipulating objects, making them a popular choice for developing OODBMS applications.
Learn more about Python here:
https://brainly.com/question/30427047
#SPJ11
Hey can anyone pls solve this problem step by step thank you!! 100 POINTS!!!!
Answers
The pressure on each leg of the table is approximately 132,352.94 pascals.
How to calculate the pressureThe area of each leg is given as 4.25 cm², so the area in square meters is:
4.25 cm² * 0.0001 m²/cm² = 0.000425 m²
Pressure = Total weight / Total area
The total weight of the table is given as 225 N, and since there are four legs, the total area is:
Total area = Area of each leg * Number of legs = 0.000425 m² * 4 = 0.0017 m²
Now, we can calculate the pressure:
Pressure = 225 N / 0.0017 m² ≈ 132,352.94 Pa
Learn more about pressure on
https://brainly.com/question/28012687
#SPJ1
Full activation of an EOC can include personnel from assisting agencies.
a. true
b. false
Answers
Answer:
True
Explanation:
nothing to really explain
Hammer welding preceded resistance welding
True
False
Answers
Answer:false
Explanation:
Bc
lmk if i’m wrong lol
Knowing that M-242 N·m, determine the maximum stress in the beam shown when the radius r ofthe fillets is 4 mm and when the radius r of the fillets is 8 mm. (Round the final answers to one decimal place.) 8 mm 2 80 mm 40 mm The maximum stress in the beam when the radius of the fillets is 4 mm i The maximum stress in the beam when the radius of the fillets is 8 mm is MPa. MPa.
Answers
The maximum stress in the beam when the radius of the fillets is 4 mm is 72.4 MPa.
The maximum stress in the beam when the radius of the fillets is 8 mm is 20.1 MPa.
To find the maximum stress, the formula used is:
σm = (M/W)×y, where σm = maximum stress, M = bending moment, W = section modulus, y = distance from neutral axis to extreme fiber at section
1. Consider the case where the radius of the fillets is 4 mm:
The centroidal axis is obtained by finding the moment of areas about the neutral axis. (centroidal axis passing through point 1)
With respect to the neutral axis and centroidal axis, the top surface is in compression while the bottom surface is in tension. Maximum stress is obtained at the extreme fiber, which is at the top surface at a distance of 72 mm from the neutral axis, i.e., y = 72 mm
W = (bh/6) + 2A (use any method), where b = width = 40 mm, h = depth = 80 mm, A = area of fillet + area of semi-circle
Area of fillet = πr²/4 = π(4)²/4 = 4π
Area of semi-circle = (πr²/2) - (r²/2) = ((π×4²)/2) - (4²/2) = 8π
W = (bh/6) + 2A = (40×80/6) + 2(4π + 8π) = 1600/3 + 24π
Therefore, W = 241.14 × 10³ mm³
Maximum stress is obtained at the extreme fiber, which is at the top surface at a distance of 72 mm from the neutral axis, i.e., y = 72 mm
σm = (M/W)×y
σm = (242×10⁶/(241.14×10³))×72
= 72.42 MPa
Therefore, the maximum stress in the beam when the radius of the fillets is 4 mm is 72.4 MPa.
2. Similarly, now consider the case where the radius of the fillets is 8 mm:
The centroidal axis is obtained by finding the moment of areas about the neutral axis. (centroidal axis passing through point 2). With respect to the neutral axis and centroidal axis, the top surface is in compression while the bottom surface is in tension. Maximum stress is obtained at the extreme fiber, which is at the top surface at a distance of 64 mm from the neutral axis, i.e., y = 64 mm
W = (bh/6) + 2A (use any method), where b = width = 40 mm, h = depth = 80 mm, A = area of fillet + area of semi-circle
Area of fillet = πr²/4 = π(8)²/4 = 16π
Area of semi-circle = (πr²/2) - (r²/2) = ((π×8²)/2) - (8²/2) = 60π
W = (bh/6) + 2A = (40×80/6) + 2(16π + 60π)
= 1600/3 + 152π
Therefore, W = 2412.62 × 10³ mm³
Maximum stress is obtained at the extreme fiber, which is at the top surface at a distance of 64 mm from the neutral axis, i.e., y = 64 mm
σm = (M/W)×y
σm = (242×10⁶/(2412.62×10³))×64 = 20.14 MPa
Therefore, the maximum stress in the beam when the radius of the fillets is 8 mm is 20.1 MPa.
To know more about stress, visit the link : https://brainly.com/question/29488474
#SPJ11
A simple Rankine cycle uses water as the working fluid. The boiler operates at 6000 kPa and the condenser at 50 kPa. At the entrance of the turbine the temperature is 450 deg C. The isentropic efficiency of the turbine is 94 percent, pressure and pump losses are negligible, and the water in the condenser is subcooled by 6.3 degC. The boiler is sized for a mass flow rate of 20 kg/s. Determine the rate at which heat is added in the boiler, the power required to operate the pumps, the net power produced by the cycle, and the thermal efficiency.
Answers
Answer:
the rate at which heat is added in the boiler = 59597.4 kW
the power required to operate the pumps = 122.57 kW
The net power produced by the cycle = 17925 kW.
The thermal efficiency = 30%.
Explanation:
The specific enthalpy of saturated liquid is equal to the enthalpy of the first point which is equal to 314 kJ/ kg.
The second enthalpy is calculated from the pump work. Therefore, the second enthalpy = first enthalpy point + specific volume of water [ the pressure of the boiler - the pressure of the condenser].
The second enthalpy = 314 + 0.00103 [ 6000 - 50 ] = 320.13 kJ/kg.
The specific enthalpy for the third point = 3300 kJ/kg.
Therefore, the rate at which heat is added in the boiler = 20 × [3300 - 320.13] = 59597.4 kW.
The rate at which heat is added in the boiler = 59597.4 kW.
Also, the power required to operate the pumps = 20 × 0.00103 [6000 - 50] = 122.57 kW.
The power produced by the turbine = 20 [ 300 - ( the fourth enthalpy value)].
The fourth enthalpy value = 3300 - 0.94 [ 3300 - 2340] = 2397.6 kJ/kg
Thus, the power produced by the turbine = 20 [ 300 - 2397.6] = 18048 kW.
The power produced by the turbine = 18048 kW.
The net power produced = 18048 + 122.57 = 17925 kW.
The thermal efficiency = [net power produced] / [the rate at which heat is added in the boiler].
The thermal efficiency = 17925/ 59597.4 = 30%.
Once the ideas were narrowed down and divided into categories, the group was split into four smaller teams. What phase(s) of the design process was each of these groups responsible for?
A. Shopping
B. Safety
C. Checkout
D. Finding stuff you need
Answers
Answer:
Finding stuff you need ( D )
Explanation:
Once an idea is narrowed down and divided into categories, The next line of action would be to create smaller groups that will be brainstorm solutions towards resolving the problem/ implement the idea faced by the team.
The phase of the design process that the smaller teams created will be focused on is to model and build a prototype ( finding stuff you need ) that would help implement the ideas
A thresher is run with a V-belt. The 2 pulleys are 3 inches and 4 inches in diameter. The distance between the pulleys is adjustable. What is the minimum distance between the pulley centers to be able to use a replacement V-belt 40 inches long?
Answers
Answer:
16.4925 inches
Explanation:
What unit of electricity is used as a signal for a computer?
Answers
Answer:
A power supply unit (PSU) converts mains AC to low-voltage regulated DC power for the internal components of a computer. Modern personal computers universally use switched-mode power supplies
Answer:
Volt is the SI (Standard International) unit of electrical potential of the..
Explanation:
Which of these is a reason an engineer may choose to use a prefabricated
building component?
A. She wants the design to be an original.
B. She wants to use a material that is not standard.
C. She is not concerned with costs.
D. She wants the construction to move quickly.
Answers
The reason an engineer may choose to use a prefabricated building component is because: D. She wants the construction to move quickly.
A prefabricated building component is also referred to as prefabs and it can be defined as a component that is fully manufactured to standard in a manufacturing plant or factory and then transported to a construction site, for partial assemblage and usage by an engineer. Some examples of prefabricated building components are:
FloorPier capsWallsBox beamsComposite parapetsBox piersGenerally, the two (2) main reasons why an engineer may choose to use a prefabricated building component are:
I. To minimize negative environmental impacts by using standard materials from the manufacturing plant or factory.
II. To make the construction process move quickly.
Read more on prefabs here: https://brainly.com/question/15799927
Have you ever prototyped an idea? How did you do it?
Answers
Yes, I have prototyped an idea.
How to prototype an idea?
STEP-1 Create Your Ideas Now: Here are some initial steps you may take to speed up the idea-generation process. Conduct in-depth research Know the market value, potential rivals, manufacturing method, and overall cost of your goods.
STEP-2 Make a Simplified Version of Your Idea: Making a straightforward representation of your idea would be the next step after conducting considerable research and settling on an idea.
STEP-3 Make a Realistic Prototype: You actually start working on your prototype at this point.
STEP-4 Develop Your Prototype Until It Is Perfect: The hardest and longest phase of them all is this one.
Hence, the prototype of an idea is given.
To learn more about the Prototype from the given link
https://brainly.com/question/27896974
#SPJ9
) calculate the magnitude of the voltage drop vab when switch s1 is closed and switch s2 is open. when switch s1 is closed and switch s2 is open.
Answers
To calculate the magnitude of the voltage drop Vab, we first need to find the current flowing through the circuit when switch S1 is closed and switch S2 is open. This can be done using Ohm's Law (V = IR), where V is voltage, I is current, and R is resistance.
1. Identify the total resistance in the circuit. Since switch S2 is open, the current will only flow through the resistors connected to switch S1.
2. Apply Ohm's Law to calculate the current flowing through the circuit: I = V/R, where V is the voltage source, and R is the total resistance.
3. Calculate the voltage drop across each resistor using Ohm's Law (V = IR).
4. Determine Vab, which is the voltage drop between points A and B.
To find the magnitude of the voltage drop Vab when switch S1 is closed and switch S2 is open, you need to follow these steps: identify the total resistance in the circuit, calculate the current using Ohm's Law, find the voltage drop across each resistor, and finally determine the voltage drop between points A and B (Vab).
Learn more about voltage drop visit:
https://brainly.com/question/31431320
#SPJ11
When calculating the magnitude of the voltage drop (Vab) across a circuit with switch S1 closed and switch S2 open, you need to consider the circuit configuration, the resistances, and the voltage source.
To accurately answer this question, I would need specific information about the circuit components such as resistor values and the voltage source value. However, I can explain the process:
1. With switch S1 closed and switch S2 open, identify the active portion of the circuit.
2. Determine the total resistance (Rt) of the active circuit.
3. Apply Ohm's Law (V = I * R) to find the current (I) flowing through the circuit. (If the voltage source is given)
4. Calculate the voltage drop (Vab) across the desired portion of the circuit using the current and the resistance of that portion.
To know more about magnitude visit:
https://brainly.com/question/29766788
#SPJ11
Convert an acceleration of 12m/s² to km/h²
Answers
A fire extinguisher spits out a liquid with density using a pressurized gas. If pt is 758307 pa, d is 16 mm, h is 108 mm, and the velocity of the liquid leaving the nozzle is 33. 2 m/s, what is the density of the liquid coming out of the tank in kg/m^3? assume the tank is very wide compared to d and you are using the extinguisher in a room with 1 atm of pressure. Also, there are no frictional/viscous losses in the tube
Answers
the density of the liquid coming out of the fire extinguisher is 1732 kg/m³.
We can use Bernoulli's equation to solve this problem, which relates the pressure, velocity, and height of a fluid in a tube:
P + 1/2ρv² + ρgh = constant
where P is the pressure, ρ is the density, v is the velocity, h is the height, and g is the acceleration due to gravity. Assuming the pressure in the tank is much greater than the atmospheric pressure in the room, we can neglect the atmospheric pressure term in the equation. Also, since the tank is very wide compared to d, we can assume that the velocity of the liquid is constant across the nozzle. At the nozzle, the pressure is equal to the pressure in the tank, so we have:
P = pt = 758307 Pa
The height of the fluid in the nozzle is negligible compared to the height of the room, so we can set h = 0.
Plugging in the given values and solving for ρ, we get:
ρ = (pt - 1/2ρv²)/gh
= (758307 - 0.5ρ × (33.2)²) / (9.81 × 0.108)
Solving for ρ, we get:
ρ = 1732 kg/m³
Therefore, the density of the liquid coming out of the fire extinguisher is 1732 kg/m³.
To learn more about Bernoulli's equation click here
brainly.com/question/29865910
#SPJ4
Which of the following is false about most machine learning models?
They require numbers or collections of numbers as input.
They are flexible enough to handle all issues you might see in your dataset (lack of data, incorrect data, etc)
They are trained by iteratively adjusting their parameters to minimize a loss function.
Once trained, their model parameters can be used to make new predictions in a process called a “model inference algorithm.”
Answers
The false statement about most machine learning models is that: B. they are flexible enough to handle all issues you might see in your dataset (lack of data, incorrect data, etc).
What is machine learning?Machine learning (ML) is also referred to as deep learning or artificial intelligence (AI) and it can be defined as a subfield in computer science which is typically focused on the use of data-driven techniques (methods), computer algorithms, and technologies to develop a smart computer-controlled robot with an ability to automatically perform and manage tasks that are exclusively meant for humans or solved by using human intelligence.
Generally speaking, machine learning models are designed and developed to accept numerical data (numbers) or collections of numerical data (numbers) as an input.
Read more on machine learning here: brainly.com/question/25523571
#SPJ1
9.For a single-frequency sine wave modulating signal of 3 kHz with a carrier frequency of 36 MHz, what is the spacing between sidebands
Answers
The spacing between sidebands is equal to 6 kHz.
Given the following data:
Modulating signal = 3 kHz.Carrier frequency = 36 MHz.What is a sideband?A sideband can be defined as a band of frequencies that are lower or higher than the carrier frequency due to the modulation process. Thus, it will either be lower than or higher than the carrier frequency.
Generally, the frequency of the modulating signal is equal to the spacing between the sidebands. Therefore, a modulating signal of 3 kHz simply means that the lower sideband is 3 kHz higher while the upper sideband is 3 kHz lower.
Spacing = 3 kHz + 3 kHz = 6 kHz.
Read more on frequency here: brainly.com/question/3841958
powder actuated tools should never be used on what type of materials
Answers
Powder actuated tools should never be used on hard, brittle, or non-ductile materials.
Powder actuated tools, also known as "powder-actuated nail guns" or "direct fastening tools," are designed for driving fasteners such as nails or pins into various materials using controlled explosive charges. However, using powder actuated tools on certain materials can pose risks and potential hazards.
Materials that are hard, brittle, or non-ductile, such as concrete, ceramic tiles, glass, stone, or certain types of metal, should not be subjected to the force generated by powder actuated tools. These materials can crack, shatter, or splinter under the high impact or pressure applied by the tool, leading to structural damage, injury, or other safety concerns.
Know more about Powder actuated tools here:
https://brainly.com/question/25152714
#SPJ11
An electric train is moving north at 100 mph and a wind is blowing to the west at 10 mph. Which way does the smoke blow?
Answers
there is no smoke its a electric train
How many wires can be broken in a wire rope sling?
Answers
Five broken wires in one strand or ten broken wires spread at random were laid in a rope.
If the total number of visible broken wires in any length of eight diameters exceeds 10% of the total number of wires, or if the rope exhibits other symptoms of excessive wear, corrosion, or defect, the rope may not be utilised for the vessel's cargo gear. Special attention must be paid to the condition of wire rope portions that are close to terminal connections, are subject to anomalous wear, and are not typically exposed for inspection.
Any eye splice in a wire rope must have two tucks with one-half of the wires cut out of each strand and at least three tucks with the whole strand of rope.
Learn more about Rope here:
https://brainly.com/question/13676406
#SPJ4
Identify this instrument.
Refracting telescope
Reflecting telescope
Microscope
Radio Telescope
Answers
5. The following code fragment reads in two numbers: Scanner input = new Scanner(System.in); int i =input.nextInt(); double d = input.nextDouble(); What is the incorrect way to enter these two numbers? a. Enter an integer, a space, a double value, and then the Enter key. b. Enter an integer, two spaces, a double value, and then the Enter key.c. Enter an integer, an Enter key, a double value, and then the Enter key. d. Enter a numeric value with a decimal point, a space, an integer, and then the Enter key.
Answers
Option A,B,C; Enter an integer, a space, a double value, and then the Enter key, Enter an integer, two spaces, a double value, and then the Enter key, Enter an integer, an Enter key, a double value, and then the Enter key. code fragment reads in two numbers: Scanner input = new are incorrect.
A subroutine or unimportant section of its source code is referred to as a "code fragment" (determined in relation to the functionality of the Work Product as a whole). A product functionally equal to the Work Product comprising such Code Fragments cannot be made by combining Code Fragments, according to the Service Provider. Many of the functions of templating languages are replaced by Fragments, which leverages version control techniques. It offers diff-based templating in place of a templating language, and "fragmentation control" in place of revision control. This module offers ease-of-use for evaluating textual code snippets and, when possible, extracting available information.
Most of the functions in this module offer their best effort but may not always be accurate. For more details, review each documentation.
Learn more about code fragment here:
https://brainly.com/question/14897816
#SPJ4
perception distance plus reaction distance plus braking distance is called:
Answers
Perception distance plus reaction distance plus braking distance is called the total stopping distance.
It is the total distance a vehicle travels from the moment a driver perceives a hazard to the point where the vehicle comes to a complete stop.
1. Perception distance: This is the distance traveled by a vehicle from the moment a driver sees a hazard until they recognize the need to apply the brakes. It depends on factors such as driver alertness, visibility conditions, and speed.
2. Reaction distance: Once the driver perceives the hazard and recognizes the need to brake, there is a delay in reacting and actually applying the brakes. Reaction distance is the distance covered during this reaction time. It depends on factors like driver reaction time and vehicle speed.
3. Braking distance: After the driver applies the brakes, the vehicle still needs to travel a certain distance to come to a complete stop. Braking distance is influenced by factors such as vehicle speed, road conditions, tire grip, and braking system effectiveness.
Combining these three components gives us the total stopping distance, which is essential for understanding and maintaining safe driving distances and speeds.
Learn more about total stopping distance
https://brainly.com/question/31727539
#SPJ11
while driving off-road, you are preparing to descend a steep hill, what transmission gear should you use?
Answers
While driving off-road, you should use the lowest gear feasible when descending a steep hill. By doing this, you'll be able to keep your speed under control and keep the car under control.
The first gear in a manual gearbox would be this. This would be low range in an automated gearbox.
Additionally, keeping the engine in the lowest gear will assist keep the brakes from overheating. By transmitting heat to the brake rotors, brakes are intended to disperse it.
The brakes, however, may become overheated and begin to fade if you apply them excessively. This could make it dangerously difficult to stop the car.
Learn more about transmission gear, here:
https://brainly.com/question/28257224
#SPJ4
1.14 a wall has inner and outer surface temperatures of 16 and 6°c, respectively. the interior and exterior air temperatures are 20 and 5°c, respectively. the inner and outer convection heat transfer coefficients are 5 and 20 w/m2 ⋅k, respectively. calculate the heat flux from the interior air to the wall, from the wall to the exterior air, and from the wall to the interior air. is the wall under steady-state conditions?
Answers
The heat flux from the wall to the interior air is 240A W/m².
The heat flux from the interior air to the wall is *XX* W/m². The heat flux from the wall to the exterior air is *YY* W/m². The heat flux from the wall to the interior air is *ZZ* W/m². Yes, the wall is under steady-state conditions.
To calculate the heat flux from the interior air to the wall, we can use the equation:
q_in = h_in * A * (T_in - T_wall)
where q_in is the heat flux, h_in is the inner convection heat transfer coefficient, A is the surface area of the wall, T_in is the interior air temperature, and T_wall is the inner surface temperature of the wall. Plugging in the given values, we get:
q_in = 5 * A * (20 - 16) = 20A W/m²
To calculate the heat flux from the wall to the exterior air, we can use the equation:
q_out = h_out * A * (T_wall - T_out)
where q_out is the heat flux, h_out is the outer convection heat transfer coefficient, T_wall is the inner surface temperature of the wall, and T_out is the exterior air temperature. Plugging in the given values, we get:
q_out = 20 * A * (16 - 5) = 220A W/m²
To calculate the heat flux from the wall to the interior air, we can use the equation:
q_wall = k * A * (T_wall - T_in)
where q_wall is the heat flux, k is the thermal conductivity of the wall, and T_in is the interior air temperature. Since the thermal conductivity is not given, we cannot calculate this value. However, we know that the sum of the heat fluxes from the interior air to the wall and from the wall to the exterior air must be equal, so:
q_wall = q_in + q_out = 20A + 220A = 240A W/m²
Therefore, the heat flux from the wall to the interior air is 240A W/m².
Since the heat fluxes are constant and not changing over time, the wall is under steady-state conditions.
Know more about heat flux, here:
https://brainly.com/question/30763068
#SPJ11
On a typical 120 volt circuit in your home, you may have a 15 ampere fuse or circuit breaker. What is the maximum power (watts) that this circuit can handle? How many 10 Watt light bulbs could you turn on without blowing the fuse?
Answers
Answer:
Maximum power is
P = V × I
P = 120 × 15
P = 1800 watt