AP Physics 2 Semester 1 Final Exam

According to Pascal's Principle, what quantity increases fluid pressure at the bottom of a container?

• Depth

• Surface Area

• g

• Density

You are originally 2 m beneath the surface of a pool. If you dive to a depth of 4 m beneath the surface, the gauge water pressure:

• increases, but less than doubles.

• doubles.

• more than doubles, but less than quadruples.

• quadruples.

• more than quadruples.

A 10-kg piece of aluminum sits at the bottom of a lake, right next to a 10-kg piece of lead, which is much denser than aluminum. Which one has the greater buoyant force exerted on it?

• the aluminum

• the lead

• Both have the same buoyant force.

• It cannot be determined without knowing their volumes.

A cubical box 25.0 cm on each side is immersed in a fluid. The pressure at the top surface of the box is 109.40 kPa and the pressure on the bottom surface is 112.00 kPa. What is the density of the fluid?

• 1000 kg/m³

• 1030 kg/m³

• 1060 kg/m³

• 1090 kg/m³

• 1120 kg/m3

When you blow some air above a paper strip, the paper rises. This happens because

• the air above the paper moves faster and the pressure is higher.

• the air above the paper moves faster and the pressure is lower.

• the air above the paper moves faster and the pressure remains constant.

• the air above the paper moves slower and the pressure is higher.

• the air above the paper moves slower and the pressure is lower.

An incompressible fluid flows steadily through a pipe that has a change in diameter. The fluid speed at a location where the pipe diameter is 8.0 cm is 1.28 m/s. What is the fluid speed at a location where the diameter has narrowed to 4.0 cm?

• 0.32 m/s

• 0.64 m/s

• 1.3 m/s

• 2.6 m/s

• 5.1 m/s

The absolute temperature of an ideal gas is directly proportional to which of the following quantities?

• The average speed of its molecules

• The average momentum of its molecules

• The average kinetic energy of its molecules

• The mass of its molecules

• It is proportional to all of the above quantities.

An electric heating coil is keeping the water inside a container a constant temperature 100°F, while the temperature of the surrounding air is 50°F. Which statement is correct?

• The thermal energy released by the heating coil in 1 h is equal to the thermal energy that leaves the water in the same time period.

• The thermal energy released by the heating coil in 1 h is larger than the thermal energy that leaves the water in the same time period.

• The thermal energy released by the heating coil in 1 h is smaller than the thermal energy that leaves the water in the same time period.

• All thermal energy released by the heating coil remains as thermal energy of the water.

If you wanted to know how much the temperature of a particular piece of material would rise when a known amount of energy was added to it by heating, which of the following quantities would be most helpful to know?

• initial temperature

• specific heat

• density

• thermal conductivity

A cyclic process is carried out on an ideal gas such that it returns to its initial state at the end of a cycle, as shown in the PV diagram in the figure. If the process is carried out in a clockwise sense around the enclosed area, as shown on the figure, then the change of internal energy over the full cycle

• is positive.

• is negative.

• is zero.

• cannot be determined from the information given.