AP Physics 2 Semester Practice

Water flowing in a horizontal pipe speeds up as it goes from a section with a large diameter to a section with a small diameter. Which of the following can explain why the speed of the water increases?

• gravitational potential energy of water-Earth system increases

• gravitational potential energy of water-Earth system decreases

• work is done because the water the larger pipe has a higher pressure

• work is done because the water in the larger pipe has a lower pressure

Salt water is more dense than fresh water. A ship floats in both fresh water and salt water. Compared to the fresh water, the amount of water displaced in the salt water is

• more

• less

• cannot be determined

• the wood

• the iron

• both have the same buoyant force

• cannot be determined without knowing their densities

A fisherman is in a boat in a small pond. He has a steel anchor on the boat. He drops the anchor in the pond, allowing it to skink. As a result, the water level in the pond will:

• rise

• stay the same

• lower

• all of the above

An underground tunnel has two openings, with one opening a few meters higher than the other. If air moves past the higher opening at a greater speed than it moves past the lower opening, what happens inside the tunnel?

• the air does not move

• air moves from the lower opening toward the higher opening

• air moves from the higher opening toward the lower opening

• air enters both openings

Tags

NGSS.MS-ESS2-6

During one stage of a reversible process, the temperature of an ideal gas remains constant as its volume decreased. Which one of the following statements concerning this situation is true?

• the process is adiabatic

• the average kinetic energy of the gas molecules increases

• the pressure of the gas decreases in this process

• heat flows out of the gas and into the surroundings

Tags

NGSS.HS-PS3-4

A student wants to increase the temperature of an ideal gas in a cylinder that is initially at room temperature. The cylinder has a movable piston. Which of the following correctly indicates an action the student could take to increase the temperature of the gas, and why the temperature increases?

• push the piston in rapidly. temperature will increase because energy will be transferred to the surroundings by cooling

• pull the piston out slowly. the gas will have time to absorb energy from the surroundings by heating as it expands

• pull the piston out rapidly. gas will expand violently and increase in temperature

• push the pin in slowly. gas will compress and increase in temperature

Tags

NGSS.HS-PS2-1

If the only force acting on an electron is due to a uniform electric field, the electron moves with constant:

• acceleration in a direction opposite to that of the field

• acceleration in a direction perpendicular to that of the field

• acceleration in the direction of the field

• speed in a direction opposite to that of the field

Tags

NGSS.HS-PS2-1

A gas undergoes an isobaric process while absorbing a small amount of heat. If the change in internal energy is large and positive, will work and change in volume be positive or negative?

Tags

NGSS.HS-PS3-2

Helium gas is sealed in a container. The container is heated, causing the temperature to increases at a constant rate. Which of the following statements is NOT true?

• the pressure of the gas increases at a constant rate

• temperature of the gas increases at a constant rate

• the average kinetic energy of the gas particles increases at a constant rate

• the average speed of the gas particles increases at a constant rate

Tags

NGSS.HS-PS3-2