an adiabatic closed system is accelerated from 0 m/s to 54 m/s. determine the specific energy change of this system, in kj/kg.
Answers
E=(v22-v12)/2 can be used to calculate the specific energy change from the change in velocity. Put the specified energy change (e=0.578 kJ/kg) to find the supplied values.
An adiabatic closed system is what?DEFINITION: A system is said to be adiabatic if no thermal energy (heat) crosses the boundaries (in practice, this is accomplished through the use of insulation, so this is often also called an "insulated" system).
How does the adiabatic process work in a closed system?
A gas-filled cylinder that is closed by a piston can roughly represent a closed adiabatic system. Now that the gas is being compressed swiftly, heat transfer to the environment may be disregarded, and for the duration of the compression, an approximative adiabatic system is formed.
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Related Questions
Is the formula for acceleration, A = change in velocity / change in time?
Answers
Answer:
cant see to find the answer sorry :( i tried :( good luck !! youll do great <333
Explanation:
The percentage change in any economic variable, including the consumer price index (cpi), is measured by which equation?
Answers
The percentage change in any economic variable, including the Consumer Price Index (CPI), is typically measured using the following equation:
Percentage Change = ((New Value - Old Value) / Old Value) * 100
This equation calculates the difference between the new value and the old value, divided by the old value, and then multiplied by 100 to express it as a percentage.
To specifically calculate the percentage change in the CPI, you would substitute the respective values of the CPI for "New Value" and "Old Value" in the equation. This allows you to determine the percentage change in the CPI over a given period, indicating the inflation or deflation rate in the economy.
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(a) Explain what is meant by a frequency of 40kHz.
Answers
To solve this we must be knowing each and every concept related to frequency. Therefore, 40kHz represents, 40,000 times something is happening per sec.
What is frequency?In physics, frequency is the quantity of waves that travel through a given point in one unit of time; it is also the amount of cycles and vibrations that a body undergoing periodic motion undergoes in one unit of time.
After traveling through a sequence of events or locations and returning towards its initial condition, an object in vibration is thought to have traversed one cycle and one vibration. Also see angular velocity and simple harmonic motion. 40kHz represents the number of something that is happening per second. 40,000 times something is happening per sec.
Therefore, 40kHz represents, 40,000 times something is happening per sec.
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Select the correct answer from each drop-down menu.
What causes atoms to form covalent bonds?
The number of
In a covalent bond, two atoms are held together by the attraction between
covalent bonds that an atom can form depends on the number of
in the atom.
Answers
Answer:
YES the first option
Explanation:
two atom are held together
Answer:
In a covalent bond, two atoms are held together by the attraction between each atom and the shared electrons. The number of covalent bonds that an atom can form depends on the number of valence electrons in the atom.
what is the definition for scientific model?
Answers
Answer:
Explanation:
Scientific modelling is a scientific activity, the aim of which is to make a particular part or feature of the world easier to understand, define, quantify, visualize, or simulate by referencing it to existing and usually commonly accepted knowledge.
How many units of energy are consumed if one uses 10 litres of petrol
Answers
Depending on the formulation, gasoline's energy content can vary, but a standard approximation states that one liter of gasoline has around 34 megajoules (MJ) of energy in it.
As a result, 10 liters of gasoline would have about how much energy is in a liter of gasoline?A liter of gasoline has 31,536,000 joules of energy, which helps to put joules in perspective. A kilowatt-hour has a joule value of 3,600,000. Hence, the energy contained in a liter of gasoline is 8.76 kW/hr,
which is a much more manageable value. How many kilometers are in 10 liters of gasoline?Let's find out how many kilometers a car can travel on a single tank of gasoline now. The distance driven here is 145 kilometers of distance in 10 litres. So, in 10 litres = 145 km distance covered. That is, in one litre of petrol a car travels a total distance of 14.5 km.
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Q1. An event has spacetime coordinates (x,t)=1,300 m,3.0 s in reference frame S. What are the spacetime that moves in the negative x - direction at 0.03c ? (1) Spacetime coordinates (Point System; 4 marks) (2) Use Lorentz transformation equation to answer the question (Rubric 4 marks)
Answers
The spacetime Using Lorentz transformation equation coordinates in the moving frame are (1303.93 m, 3.01 s).
Given information:
An event has spacetime coordinates (x,t)=1,300 m,3.0 s in reference frame S.What are the spacetime that moves in the negative x - direction at 0.03c?We know that the coordinates of the same event as observed from two different inertial frames are related by the Lorentz transformation equations.
Using Lorentz transformation equation:(x', t') = (γ(x − vt), γ(t − vx/c²))where γ = 1/√(1−v²/c²) represents the Lorentz factor, x is the position in the stationary frame, t is time in the stationary frame, x' is the position in the moving frame, t' is time in the moving frame, v is the relative velocity between the two frames and c is the speed of light in vacuum.We are given,x = 1,300 mt = 3.0 s, v = −0.03c (since the motion is in the negative x direction)∴ γ = 1/√(1−v²/c²) = 1/√(1−0.03²) = 1/0.997
The spacetime coordinates in the moving frame, (x', t') = (γ(x − vt), γ(t − vx/c²))= [1/0.997 (1300 - (-0.03c)(3.0))] m, [1/0.997 (3.0 - (-0.03c)(1300)/c²)] s= (1303.93 m, 3.01 s) [correct to 2 decimal places]
Therefore, the spacetime coordinates in the moving frame are (1303.93 m, 3.01 s).
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a battery-operated power tool such as a cordless drill converts
Answers
A battery-operated power tool, such as a cordless drill, converts electrical energy stored in the battery into mechanical energy through the use of a motor.
The battery, typically a lithium-ion or nickel-cadmium type, supplies the necessary voltage and current to the motor. As electricity flows through the motor's coils, it generates a magnetic field that interacts with permanent magnets, creating rotational force (torque) to turn the drill bit or drive a screw. The conversion of electrical energy to mechanical energy allows for enhanced portability and convenience, eliminating the need for a power cord and enabling users to work in a wide range of locations. Cordless drills often come with variable speed settings and torque adjustments, providing greater versatility and control for various tasks.
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A complete electric circuit includes a voltage source, current, wires, and something to _________ the flow of current.
Answers
Answer:
If you ground the flow of current like the last part of your question states you will not have a complete circuit as the circuit will open on a short circuit. To make a complete circuit operate you need a power source, an overload device to protect the conductors of the circuit, conductors to carry the current and a load across the power source which causes the current to flow in the circuit.
Explanation:
Leave any one of these things out and you will not have a complete circuit.
A complete electric circuit includes a voltage source, current, wires, and load to flow the current.
What is load in an electric circuit?An electrical load can be described as an electrical component of a circuit that consumes electrical power such as electrical appliances, bulbs, and lights. The electrical load may also refer to the power consumed by a circuit. An electrical load is opposed to a power source, such as a battery, which produces power.
If an electric circuit contains an output port, a pair of terminals that generates an electrical signal, the circuit connected to this terminal is the load. Load influences the performance of circuits according to the output voltages or currents, such as voltage sources, and amplifiers.
Mains power outlets supply power at constant voltage, with electrical appliances connected to the power circuit making up the load. When a high-power device switches on, it drastically reduces the load impedance.
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A ball sits on the table not moving. A child comes along and gives the ball a push. Which law is best described by this example?
A. Newton's First Law
B. Newton's Second Law
C. Newton's Third Law
D. Avagadro's Law
Answers
Answer:
A Newton's First law
Explanation:
In Newtons first law of motion it states that that every object will remain at rest or in uniform motion in a straight line unless compelled to change its state by the action of an external force. Which mean the ball will not move until the force of the child come and pushes on the ball.
4. A chandelier brightens a ballroom after a waiter moves a switch
Answers
Answer:
because switch moves after a waiter
Explanation:
Considerando que los coeficientes de dilatación de los siguientes metales son: hierro 11.7 x 10-6; plomo 27.3 x 10-6; cobre 16.7 x 10-6. Si tienes 3 varillas de 4 m de longitud de los diferentes metales al incrementar su temperatura 10°C cada uno, el que tendrá una mayor longitud será e
Answers
Answer:
el plomo será el más largo
Explanation:
Dado que;
longitud inicial (l1) = 4m
Longitud final l2
aumento de temperatura (θ) = 10 ° C
Coeficiente de expansión lineal α
Ahora para el hierro;
α = 11,7 x 10-6
Desde;
l2-l / l1θ = α
l2 = α l1θ + l1
l2 = l1 (αθ + 1)
l2 = 4 ((11,7 x 10-6 * 10) + 1)
l2 = 4.00044 m
Para el plomo
l2 = 4 ((27,3 x 10-6 * 10) + 1)
l2 = 4,00109 m
Para cobre
l2 = 4 ((16,7 x 10-6 * 10) + 1)
l2 = 4.000668 m
Por lo tanto, el plomo será el más largo
Five race cars speed toward the finish line at the Jasper County Speedway. The table lists each car’s speed in meters/second. If each car has the same mass, which car will require the longest time to come to a full stop?
Car A Car B Car C Car D Car E
890 m/s 850 m/s 790 m/s 895 m/s 870 m/s
Car A
Car B
Car C
Car D
Car E
Answers
Answer:
Car D
Explanation:
Answer:
The corect answer is car D hope this helped (:
Explanation:
Given:
I=45C, t=0.5h, V=10V. Find resistance.
Answers
Given: I=45C, t=0.5h, V=10V. The resistance is 0.22Ω.
The relationship between resistance, voltage, and current can be defined by the formula R = V / I, the unit of resistance is the ohm (Ω). Here is how to solve the given problem:
Given I = 45 C, t = 0.5 h, V = 10 V.
As we know, R = V / I.
Putting the given values in the formula, R = 10 / 45 R = 2 / 9 R = 0.22 Ω.
The formula for resistance is R = V/I. Ohm's law states that the current flowing through a conductor between two points is directly proportional to the voltage across the two points, this relationship is represented mathematically as I = V/R, where I represents current, V represents voltage, and R represents resistance. In this case, the voltage is 10V, and the current is 45C over a time of 0.5 hours. Therefore, the resistance can be calculated by dividing the voltage by the current, which gives an answer of 0.22Ω
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PLEASE HELP! I WILL MARK BRAINLIEST! tight guitar string has a frequency of 560 Hz as its third harmonic. What will be its fundamental frequency if it is fingered at a length of only 60% of its original length?
Answers
Answer:
Original fundamental frequency = 311.111 Hz (Approx)
Explanation:
Given:
Frequency (f) = 560 Hz
3rd harmonic
Used length = 60%
Find:
Original fundamental frequency.
Computation:
Fundamental frequency = Frequency (f) / 3rd harmonic
Fundamental frequency = 560 / 3
Original fundamental frequency = 560 / 3(60%)
Original fundamental frequency = 560 / 1.8
Original fundamental frequency = 311.111 Hz (Approx)
Do you hear sounds around you as one frequency at a time or as many frequencies at once?
Answers
Answer:
The commonly stated range of human hearing is 20 Hz to 20 kHz. Under ideal laboratory conditions, humans can hear sound as low as 12 Hz and as high as 28 kHz, though the threshold increases sharply at 15 kHz in adults, corresponding to the last auditory channel of the cochlea.
Explanation:
hope it help
mark me as brainliest
Answer:
20 Hz to 20 kHz. Humans can hear sound as low as 12 Hz and as high as 28 kHz, though the threshold increases sharply at 15 kHz.
Explanation:
learned this in physics about 2 years ago and its stuck with me ever since lol. sorry i am not the best at explaining lol
A motorcycle patrolman starts from rest at A two seconds after a car, speeding at the constant rate of 120km/h, passes point A. If the patrolman accelerates at the rate of 6m/s^2 until he reaches his maximum permissible speed of 150km/h, which he maintains, calculate the distance from point A to the point at which be overtakes the car
Answers
The distance from point A to the point at which the patrolman overtakes the car is 2700 meters.
The distance from point A to the point at which the motorcycle patrolman overtakes the car is 2700 meters. Here's a step-by-step breakdown of the calculations:
Step 1:
Distance covered by the car in 2 seconds:
Distance = Speed * Time
Speed = 120 km/hr = (120/3600) m/s = (1/30) m/s
Time = 2 seconds
Distance = (1/30) m/s * 2 s = 2/30 km = (2/30) * 1000 m = 66.67 m
Step 2:
Calculating the time taken by the motorcycle patrolman to reach a speed of 150 km/h:
Using the equation v = u + at
Initial velocity (u) = 0 m/s
Final velocity (v) = 150 km/h = (150000/3600) m/s = (125/3) m/s
Acceleration (a) = 6 m/s^2
(125/3) m/s = 0 m/s + 6 m/s^2 * t
Solving for t:
t = (125/3) / 6 sec = (125/3) * (1/6) sec = 125/18 sec
Step 3:
Calculating the distance covered by the motorcycle patrolman in the first (125/18) seconds:
Using the equation s = ut + (1/2)at^2
Initial velocity (u) = 0 m/s
Acceleration (a) = 6 m/s^2
Time (t) = 125/18 sec
s = 0 * (125/18) + (1/2) * 6 * ((125/18)^2) = 1562.5/9 m
Step 4:
Calculating the time taken by the motorcycle patrolman to overtake the car:
Let the time taken be t sec
Speed of the car = 120 km/hr = (100/3) m/s
Distance covered by the car in time t = (100/3) m/s * t
Distance covered by the motorcycle patrolman in time t = Distance covered by the car in time t + Distance covered by the motorcycle patrolman in the first (125/18) sec
Time taken = (Distance to be covered) / (Speed of the motorcycle patrolman)
= (Distance covered by the motorcycle patrolman in time t - Distance covered by the motorcycle patrolman in the first (125/18) sec) / [(150000/3600) m/s]
= [(100/3) * t + 1562.5/9 - 1562.5/9] / [(150000/3600)] sec
= [(100/3) * t] / [(150000/3600)] sec
= (1/45) * t sec
The two times should be equal, so we can set up the equation:
(100/3) * t + 1562.5/9 = (1/45) * t
Solving for t:
(3200/45) * t + 1562.5/9 = t
[(3200/45) - (1/45)] * t = 1562.5/9
t = (1562.5 * 45) / (9 * 3199) sec
Step 5:
Distance from point A to the point at which the motorcycle patrolman overtakes the car:
Distance = Distance covered by the motorcycle patrolman in the first (125/18) sec + Distance covered by the motorcycle patrolman in time t
Distance = 1562.5
/9 + [(100/3) * t + 1562.5/9 - 1562.5/9] m
= 1562.5/9 + (100/3) * (1562.5 * 45) / (9 * 3199) m
= 1562.5/9 + 10425/3199 m
= [(1562.5 * 3199) + 10425] / 28791 m
= 2700 m
Therefore, the distance from point A to the point at which the motorcycle patrolman overtakes the car is 2700 meters.
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suppose you lift a stone that has a mass of 5.9 kilograms off the floor onto a shelf that is 0.5 meters high. how much work have you done?
Answers
Work done to lift the stone of mass 5.9 kg is 28.91 J.
The work done through pressure is made of the displacement and the component of the carried-out force of the object inside the direction of displacement. whilst we push a block with a few pressure ' F ' the body movements with a few accelerations, paintings are carried out. paintings executed is written as W = F.
The paintings executed by using pressure are defined to be manufactured from the aspect of the force in the path of the displacement and the significance of this displacement. formula. work can be calculated by multiplying pressure and Distance within the course of force as follows. W = F × d.
Work is achieved whenever a pressure actions something over a distance. you can calculate the strength transferred, or work carried out, by multiplying the pressure via the space moved in the route of the pressure.
Calculation:-
mass = 5.9
g = 9.8 m/s
f = 0.5 m
work done = mgh
= 5.9 × 9.8 × 0.5 J
= 28.91 J
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which particles most likely will be dispositive first as a velocity of a stream carrying a mixture of particles decreases
Answers
As the velocity of a stream carrying a mixture of particles decreases, the heaviest particles will most likely be deposited first. This phenomenon is known as sedimentation.
The process of sedimentation separates particles of different sizes and densities from a mixture by allowing them to settle at different rates due to gravity. The heavier particles settle faster than lighter ones. Therefore, they are the first to be deposited.Sedimentation can occur naturally or artificially. For example, in a river, sedimentation can occur naturally due to changes in water flow and velocity. Artificial sedimentation can be used in water treatment plants to remove impurities from water
The heaviest particles will most likely be deposited first as the velocity of a stream carrying a mixture of particles decreases.Explanation: This is due to the process of sedimentation, which separates particles of different sizes and densities from a mixture by allowing them to settle at different rates due to gravity. The heavier particles settle faster than lighter ones, and hence they are the first to be deposited.
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What is the basic sequence of operation at the beginning of a freezer defrost?
a. Compressor shuts off, evaporator fans run, and heaters come on
b. Evaporator fans shut off, compressor shuts off, and heaters come on
c. Fans and heaters are delayed until the compressor cycles off
Answers
The basic sequence of operation at the beginning of a freezer defrost is: evaporator fans shut off, the compressor shuts off, and heaters come on. Therefore, the correct answer is option B.
A freezer is an appliance that preserves food at temperatures below 0°C by using a refrigerant such as Freon or ammonia. The function of a freezer is to preserve food by keeping it at a temperature below freezing, which prevents the growth of bacteria and other microorganisms that can cause spoilage.
Freezers are also used to make ice, which can be used to keep drinks and other items cold. Additionally, freezers can be used to store frozen foods, such as frozen vegetables, meats, and desserts, which can be thawed and cooked at a later time.
Defrosting a freezer is important as it helps to prevent the buildup of ice on the evaporator coils and ensures the proper functioning of the freezer.
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What are the characteristics of terristrial animals?
Answers
Answer:
They are provided with keen senses of sight, smell and hearing.
Answer:
Terrestrial animals
breathe through skin or nostrils, have differently adapted bodies, and exchange of gases is done from air, whereasWhich of the following is an example of a dry lubricant? oil grease graphite petroleum
ANSWER ASAP WILL GIVE BRAINLIEST!
Answers
Answer:
Dry lubricants or solid lubricants are materials that, despite being in the solid phase, are able to reduce friction between two surfaces sliding against each other without the need for a liquid oil medium.
Explanation:
Answer:
Your answer is graphite :) Have a nice day
Explanation:
What is the answer? I am trying to do some exercise
Answers
Answer:
fourth quadrant.
Explanation:
First, let us see how many 2 pi radians are there in 40 pi /7. The answer is found by dividing 40 pi / 7 by 2 pi
\(\frac{40\pi}{7}\div2\pi=\frac{40\pi}{7}\times\frac{1}{2\pi}\)\(=\frac{40\pi}{7}\times\frac{1}{2\pi}=\frac{20}{7}=2R6\)Meaning ( 40 pi / 7 ) / ( 2pi ) = 2 Remainder 6
Meaning there are 2 complete revolutions in ( 40 pi / 7 ).
How about the revolution that is incomplete?
Now,
\(\frac{40\pi}{7}-2(2\pi)=\frac{40}{7}\pi-4\pi\)\(=\frac{12}{7}\pi\)\(=1.71\pi\)Which if we plot, looks like
Meaning that 40 pi / 7 lies in the fourth quadrant.
When a cracker or bread dissolves in your mouth, is that a physical or chemical change?
Answers
Answer:
Chemical change.
Explanation:
The saliva or salivary amylase is a bio-catalyst...it causes chemical change during the dissolving process. Also, once the food is dissolved it can't be brought back to it's original state.
Which types of electromagnetic waves have higher frequencies than the waves that make up ultraviolet light? Select two options. Radio waves infrared light microwaves gamma rays visible light X-rays.
Answers
Answer:
the answer is equal to the microwave gamma rays visible light x-rays.
An atom of xenon has a mass number of 127 amu. How many neutrons
does it contain? *
Answers
Answer:
73 neutrons.
Explanation:
Data obtained from the question:
Mass number of Xenon = 127.
Neutron number =...?
We can obtain the number of neutron present as follow:
Atomic number of Xenon = 54
Recall:
Atomic number = proton number = 54
Mass number = proton + neutron
127 = 54 + Neutron
Neutron = 127 – 54
Neutron = 73.
Therefore, 73 neutrons are present in the Xenon atom.
A 1-kg book is at rest on a desk. Determine the force the desk exerts on the book
Answers
\(\displaystyle F_n = 9.8 \ N\)
General Formulas and Concepts:Math
Pre-Algebra
Order of Operations: BPEMDAS
BracketsParenthesisExponentsMultiplicationDivisionAdditionSubtractionLeft to RightPhysics
Forces
SI Unit: Newtons N
Free Body Diagrams
Gravitational Force: \(\displaystyle F_g = mg\)
m is mass (in kg)g is Earth's gravity (9.8 m/s²)Normal Force: \(\displaystyle F_n\)
Newton's Law of Motions
Newton's 1st Law of Motion: An object at rest remains at rest and an object in motion stays in motionNewton's 2nd Law of Motion: F = ma (Force is equal to [constant] mass times acceleration)Newton's 3rd Law of Motion: For every action, there is an equal and opposite reactionExplanation:Step 1: Define
1 kg book at rest
Step 2: FBD
See Attachment
Draw a free body diagram to label the forces acting upon the book. We see that we would have gravitational force from Earth pointing downwards and normal force from the surface of the desk pointing upwards.
Since the book is not moving, we know that ∑F = 0 (sum of forces equal to 0).
Step 4: Find Normal Force
Define Forces [Newton's Law of Motions]: \(\displaystyle \sum F = 0\)[Newton's Law of Motions] Substitute in forces: \(\displaystyle F_g - F_n = 0\)[Newton's Law of Motions] [Addition Property of Equality] Isolate \(\displaystyle F_n\): \(\displaystyle F_g = F_n\)[Newton's Law of Motions] Substitute in \(\displaystyle F_g\): \(\displaystyle mg = F_n\)[Newton's Law of Motions] Rewrite: \(\displaystyle F_n = mg\)[Newton's Law of Motions] Substitute in variables: \(\displaystyle F_n = (1 \ kg)(9.8 \ \frac{m}{s^2})\)[Newton's Law of Motions] Multiply: \(\displaystyle F_n = 9.8 \ N\)
How much energy does a 50kg rock have if it sitting on the edge of a 15m cliff
Answers
Answer:
14715 joules
Explanation:
There are 2 ways of collecting the sun’s energy. What are they? Give an example of each.
Answers
A light spring with force constant 3.70 N/m is compressed by 8.64 cm as it is held between a 0.261-kg block on the left and a 0.522-kg block on the right, both resting on a horizontal surface. The spring exerts a force on each block, tending to push them apart. The blocks are simultaneously released from rest. Find the acceleration with which each block starts to move, given that the coefficient of kinetic friction between each block and the surface is the following. (Let the coordinate system be positive to the right and negative to the left. Be sure to include the sign to indicate the direction of the acceleration.) (a) μ = 0 heavier block lighter block (b) μ = 0.110 heavier block lighter block (c) μ = 0.480 heavier block lighter block m/s² m/s² m/s² m/s² m/s² m/s²
Answers
The lighter block will also accelerate to the right with an acceleration of -0.82 m/s².
(a) μ = 0
The heavier block will accelerate to the right with an acceleration of:
a = F / m = k x / m = (3.70 N/m) (0.0864 m) / 0.261 kg = 1.22 m/s²
The lighter block will also accelerate to the right with an acceleration of 1.22 m/s².
(b) μ = 0.110
The heavier block will accelerate to the right with an acceleration of:
a = F - μk / m = k x / m - μk / m = (3.70 N/m) (0.0864 m) / 0.261 kg - (0.110)(0.261 kg)(9.80 m/s²) = 0.68 m/s²
The lighter block will not accelerate because the force of friction is greater than the force of the spring.
(c) μ = 0.480
The heavier block will accelerate to the right with an acceleration of:
a = F - μk / m = k x / m - μk / m = (3.70 N/m)(0.0864 m) / 0.261 kg - (0.480)(0.261 kg) (9.80 m/s²) = -0.82 m/s²
Therefore, the lighter block will also accelerate to the right with an acceleration of -0.82 m/s².
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