A gas in a large cylinder which contains a piston has 4578 J of Internal energy. The piston which has a surface area of 1.4 m2 exerts a pressure of 25 P on the gas and moves 3.5 m. The new internal energy was 1883 J.
What is the change in internal energy for the gas?
Question 18
18.
Question 19
19.
A gas in a large cylinder which contains a piston has 4578 J of Internal energy. The piston which has a surface area of 1.4 m2 exerts a pressure of 25 P on the gas and moves 3.5 m. The new internal energy was 1883 J.
Find the work done by the piston on the gas to the nearest tenth of a joule.
Question 20
20.
Question 21
21.
A gas in a large cylinder which contains a piston has 4578 J of Internal energy. The piston which has a surface area of 1.4 m2 exerts a pressure of 25 P on the gas and moves 3.5 m. The new internal energy was 1883 J.
Find the heat released by the gas to the nearest tenth of a joule.
Question 22
22.
If the total heat produced by an internal combustion engine was the answer to the previous problem, then what is the efficiency of the engine if it does 1529.5J of work and 2288J of heat leaves the tailpipe? (to nearest tenth of a percent)
Question 23
23.
A 14.5kg book is pushed 23.3m across a table by an applied force of 1546N. Tthe initial velocity of the book is 0.85m/s and µk is 0.03.
Draw the FBD for this situation.
Question 24
24.
Question 25
25.
A 14.5kg book is pushed 23.3m across a table by an applied force of 1546N. Tthe initial velocity of the book is 0.85m/s and µk is 0.03.
Find the net Force in the x-direction to the nearest hundreth of a newton.
Question 26
26.
Question 27
27.
Question 28
28.
Question 29
29.
A 14.5kg book is pushed 23.3m across a table by an applied force of 1546N. Tthe initial velocity of the book is 0.85m/s and µk is 0.03.
Find the book's final velocity to nearest hundreth m/s.
Question 30
30.
Question 31
31.
Question 32
32.
Ever the life of the party, Isaac Newton jumps off of a 10 m tall roof with an initial speed of 2.3 m/s into a bounce-house below. He lands on the floor of the bounce house, 1.5 meters above the ground, and compresses it by 0.6 meters. The spring constant of the bounce-house is 3.12 x 10^4 N/m.
Find the mass of Isaac Newton to nearest tenth of a kg.
Rudolf the Red Nosed Reindeer (m=100kg) travels with a velocity of 10 m/s. If his smaller reindeer friend (m=50kg) is traveling with Rudolf at the same speed, what is his kinetic energy in comparison to Rudolf’s?
half as much
the same
double
four times as much
A 20 kg object falls 2.0 meters to the floor. At what point in its fall does the kinetic energy of the object equal its potential energy at a single moment in time?
very near to the top of the fall
at all points of the fall
the instant before it hits the floor
halfway to the floor
An object falls without friction near Earth’s surface. The loss of its potential energy is equal to its ______.
loss of height
gain in kinetic energy
loss of mass
gain in velocity
The action that would require no work to be done is _______________.
lifting a balloon filled with air from the floor to a desktop
holding a 10 Kg object over your head
pedaling a 100N bicycle up a small hill
pushing a 25Kg box of books across the floor
Running up a flight of stairs, Maria generates 250 watts of power. If it takes her 4 seconds to go up the stairs, the amount of work she does in running up the stairs is _______.
0.013 J
1000 J
75 J
2700 J
Which requires more work: lifting a 50 kg sack vertically 2 meters or lifting a 25 kg sack vertically 4 meters?
both require the same amount of work
lifting the 25 Kg sack
lifting the 50 Kg sack
Which has greater kinetic energy, a car traveling at 15 m/s or a half-as-massive car traveling at 30 m/s?
both have the same kinetic energy
the 15 m/s car
the 30 m/s car
A roller coaster car is released from rest at position A, and moves through positions B, C, and D (friction negligible)
At what point is the kinetic energy the least?
A
B
C
D
A roller coaster car is released from rest at position A, and moves through positions B, C, and D (friction negligible)
At what point is the potential energy the least?
A
B
C
D
A roller coaster car is released from rest at position A, and moves through positions B, C, and D (friction negligible)
Rank the positions from highest speed to lowest:
ABCD
DCBA
DBCA
ACBD
Potential energy is the energy an object has because of its ________.
force
position
mass
velocity
As a pendulum swings back and forth ___________.
its energy is all PE at the top of its swing
PE turns into KE as it swings down
at the lowest point in its swing, it has the greatest KE
KE turns into PE as it swings up
all of these statements are true
According to the first law of thermodynamics, the difference between energy transferred to or from a system by heat and energy transferred to or from a system by work is equivalent to which of the following?
Change in temperature
Entropy change
Change in internal energy
Specific Heat
A cup of water is scooped up from a swimming pool. Compare the temperature T and the internal energy U of the water in both the cup, and the swimming pool.
TPool > Tcup and U is same.
T is same and UPool < Ucup.
T is same, U is same.
T is same and UPool > Ucup.
TPool < Tcup and U is same.
When mechanical work is done on a system (for example, the compression of air within a bicycle tire pump),
The internal energy always increases.
Cannot be determined with the given information.
The internal energy always decreases.
Which of the following best describes the relationship between two systems in thermal equilibrium?
the volumes are equal
the average partice velocity is zero
the masses are equal
no heat is exchanged
A gas in a large cylinder which contains a piston has 4578 J of Internal energy. The piston which has a surface area of 1.4 m2 exerts a pressure of 25 P on the gas and moves 3.5 m. The new internal energy was 1883 J.
What is the equation to find the work done by the piston on the gas?
A gas in a large cylinder which contains a piston has 4578 J of Internal energy. The piston which has a surface area of 1.4 m2 exerts a pressure of 25 P on the gas and moves 3.5 m. The new internal energy was 1883 J.
What is the equation to find the heat released by the gas?
A 14.5kg book is pushed 23.3m across a table by an applied force of 1546N. Tthe initial velocity of the book is 0.85m/s and µk is 0.03.
Which of these is the Fnet equation in the x-direction?
A 14.5kg book is pushed 23.3m across a table by an applied force of 1546N. Tthe initial velocity of the book is 0.85m/s and µk is 0.03.
Which of these is the Fnet equation in the y-direction?
A 14.5kg book is pushed 23.3m across a table by an applied force of 1546N. Tthe initial velocity of the book is 0.85m/s and µk is 0.03.
Which of these is the work-kinetic energy theorem?
A 14.5kg book is pushed 23.3m across a table by an applied force of 1546N. Tthe initial velocity of the book is 0.85m/s and µk is 0.03.
Which of these is the equation to find the book's final velocity?
Ever the life of the party, Isaac Newton jumps off of a 10 m tall roof with an initial speed of 2.3 m/s into a bounce-house below. He lands on the floor of the bounce house, 1.5 meters above the ground, and compresses it by 0.6 meters. The spring constant of the bounce-house is 3.12 x 10^4 N/m.
Which of the following is the appropriate conservation of energy equation for this situation?
Ever the life of the party, Isaac Newton jumps off of a 5 m tall roof with an initial speed of 2.3 m/s into a bounce-house below. He lands on the floor of the bounce house, 1.5 meters above the ground, and compresses it by 0.3 meters. The spring constant of the bounce-house is 3.12 x 10^4 N/m.
Which of the following is the appropriate equation to find the mass of Isaac Newton?