AP B MC

A ball is thrown with an initially speed of 20 m/s at a angle of 60 degrees to the ground. If air resistance is negligible, what is the ball's speed at the instant it reaches its maximum height from the ground.

The maximum energy of photoelectrons emitted from a metal surface depends on which of the following?
I. The intensity of the incident light.
II. The frequency of the incident light
III. The work function of the metal

At a point of observation, the time between successive crests of a passing wave is 0.2 s. Which of the following must be true of the wave?

The index of refraction of air increases linearly with its density. A ray or light passes through an interface from vacuum into air. Statements that are true as the air is heated at constant pressure include which of the following?
I. The frequency of refracted light in the air decreases.
II. The wavelength of refracted light in the air decreases
III. The speed of light in the air increases.

Two skaters are initially at rest next to each other on frictionless ice. Skater A pushes on skater B. If skater A has greater mass than skater B, which of the following correctly relates the magnitudes of their momentums p and their kinetic energies K after the push.

When a voltage V is connected across a capacitor of capacitance C, charges of equal magnitude Q and opposite sign are on the plates, and the energy stored in the capacitor is U. If C is doubled and V is not changed, how are Q and U affected?

The wavelength of yellow sodium light in vacuum is approximately 6.0 x 10-7 m. The frequency of the light is most nearly

For the hydrogen atom, how does the potential energy U of the atom change as the energy level n increases?

A small care with mass m and speed 2v and a large car with mass 2m and speed v both travel the same circular section of an unbaked road. If the frictional force required to keep the small car on the road without skidding is F, then the frictional force required to keep the large car on the road without skidding is

Traveling waves are generated on a string fixed at both ends. The string has a length L, a linear mass density μ, and a tension T. Which of the following will cause the wave speed to increase?
I. Using the same string but increasing the tension.
II. Using a longer string with the same μ and T
III. Using a string with the same L and T but a smaller μ

When a light wave passes from air into glass, quantities that remain constant include which of the following.
I. Frequency
II. Wavelength
III. Velocity

A student wants to determine experimentally, without disconnecting any wires in the circuit, the DC current moving through a copper wire. Which of the following items of laboratory equipment would be sufficient to make the necessary measurements for this demonstration?

The present theory of the nature of light suggests that it

Which of the following experimental observations provides the best support for the statement, "Light behaves like a wave"?

Young's double-slit experiment is performed with a pair of slits separated by a distance d. A screen is a distance L away from the slits, and the distance from the central maximum to the nth bright fringe is x. What is the wavelength of this light?

An object is placed 12 cm in front of a concave mirror. The mirror forms a real inverted image that is the same size as the object, also at 12 cm in front of the mirror. The focal length of the mirror is

Which of the following is true of the conservation of momentum and kinetic energy?

A force of constant magnitude F and fixed direction acts on an object of mass m that is initially at rest. If the force acts for a time interval Δt over a displacement Δx, what is the magnitude of the resultant changes in the linear momentum of the object?