AP Physics 2: Algebra-Based Unit 2

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1 point

I only

II only

I and II only

I and III only

I, II, and III

1 point

I only

II only

I and II only

I, II, and III

1 point

III only

I and II only

II and III only

I, II, and III

None

1 point

The total internal energy and the number of gas molecules in this system.

The average kinetic energy of all gas molecules in this system.

The moles of gas in this system.

The root-mean-square velocity and the gram-molecular mass of the gas in this system.

A, B, and C only

Any of the above

What do we know for certain about a system undergoing this process? *

1 point

The temperature is dropping.

The system is transferring energy to its surroundings.

The system is being compressed.

U total is decreasing.

1 point

III only

I and III only

I, II, and III

None

Which of the following correctly identifies the unique characteristic of each thermodynamic process? *

1 point

Isobaric: ∆P=0; Isothermal: Q = 0; Adiabatic: ∆U = 0; Isochoric: ∆V = 0

Isobaric: ∆P=0; Isothermal: Q = 0; Adiabatic: ∆T = 0; Isochoric: ∆V = 0

Isobaric: P = constant; Isothermal: ∆U = 0; Adiabatic: Q = 0; Isochoric: ∆V = 0

Isobaric: ∆V = 0; Isothermal: ∆T = 0; Adiabatic: Q = 0; Isochoric: P = constant

1 point

I only

II only

I and II only

II and III only

I, II, and III

P and V represent positive integers. The lowest thermodynamic process changes volume at a constant pressure of P. Which of the following correctly ranks the work done on the gas by the processes? *

1 point

W1=W2=W3

W1>W2>W3

W1<W2<W3

(W1=W3)<W2

More information is needed to answer this question.

Which of the following correctly identifies any changes to the system? *

1 point

∆T < 0, ∆U < 0, ∆W = 0, ∆Q < 0

∆T < 0, ∆U < 0, ∆W > 0, ∆Q < 0

∆T < 0, ∆U < 0, ∆W < 0, ∆Q = 0

∆T < 0, ∆U = 0, ∆W = 0, ∆Q = 0

What is the total amount of work done by the gas in the thermodynamic process ABCD? What is the total amount of work done by the surroundings? *

1 point

Option 1

Option 2

Option 3

Option 4

What is the total amount of work done by the gas in the thermodynamic process ABC? What is the total amount of work done by the surroundings? *

1 point

Option 1

Option 2

Option 3

Option 4

Four identical students hold one of each material with a dimension 15cm×15cm×15cm at room temperature. Note that those students hold the materials in the same position. Which of the following correctly ranks the level of “warmness” the students feel from the “coldest” material to the “warmest”? *

1 point

Silicon, Ordinary Glass, Silver, Gold

Gold, Silver, Ordinary Glass, Silicon

Ordinary Glass, Silicon, Gold, Silver

Silver, Gold, Silicon, Ordinary Glass

More information is needed.

At 1 ℃, 12×10^23 molecules of helium gas are moving closely together. The molar mass of helium gas is 4.00 g/mol. Which of the following is closest to the root-mean-square velocity of the helium gas? *

1 point

3.22×10^-12 m/s

5.51×10^-11 m/s

1.74×10^-9 m/s

More information is needed.

One mole of gas undergoes this ABC thermodynamic process. Which of the following correctly identifies the temperature of the gas at state C (TC) and the temperature change for the entire ABC process (∆T)? *

1 point

Option 1

Option 2

Option 3

Option 4

1 point

Option 1

Option 2

Option 3

Option 4

200 J of heat leaves the hot reservoir of a heat engine. 80 J of heat is received by the cold reservoir. What is the efficiency of the engine? *

1 point

20%

40%

60%

80%

Which of the following formulas calculates the theoretical maximum possible heat engine efficiency for a given hot reservoir and cold reservoir? *

1 point

Option 1

Option 2

Option 3

Option 4

Two solids A and B in an isolated room are connected by a block of Silver at 294 K, which has a high thermal conductivity. Solid A has a temperature 1.5 times as high as solid B. TA>294 K. The system is the room. After an hour, what do we know for sure? *

1 point

The temperatures of the two solids are the same.

Some work is done on solid B.

The room’s temperature is 294 K.

The entropy of the system increases.

None of the above

1 point