June 2016 Physics Regents Questions 11-20 Question Preview (ID: 59810)

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What is the sign of the net charge on A and B?

a) A is positive and B is positive.

b) A is positive and B is negative.

c) A is negative and B is negative.

d) A is negative and B is positive.

A horizontal force of 20 newtons eastward causes a 10-kilogram box to have a displacement of 5 meters eastward. The total work done on the box by the 20-newton force is

a) 40 J

b) 100 J

c) 200 J

d) 1000 J

A block initially at rest on a horizontal, frictionless surface is accelerated by a constant horizontal force of 5.0 newtons. If 15 joules of work is done on the block by this force while accelerating it, the kinetic energy of the block increases by

a) 3.0 J

b) 15 J

c) 20 J

d) 75 J

If PE is the gravitational potential energy of A relative to the ground, then the gravitational potential energy of B relative to the ground is

a) PE

b) 2PE

c) PE/2

d) 4PE

What is the kinetic energy of a 55-kilogram skier traveling at 9.0 meters per second?

a) 2.5 × 10^2 J

b) 5.0 × 10^2 J

c) 2.2 × 10^3 J

d) 4.9 × 10^3 J

A 5.09 × 10^14-hertz electromagnetic wave is traveling through a transparent medium. The main factor that determines the speed of this wave is the

a) nature of the medium

b) amplitude of the wave

c) phase of the wave

d) distance traveled through the medium

A motor does a total of 480 joules of work in 5.0 seconds to lift a 12-kilogram block to the top of a ramp. The average power developed by the motor is

a) 8.0 W

b) 40. W

c) 96 W

d) 2400 W

A 5.8 × 10^4-watt elevator motor can lift a total weight of 2.1 × 10^4 newtons with a maximum constant speed of

a) 0.28 m/s

b) 0.36 m/s

c) 2.8 m/s

d) 3.6 m/s

A stationary police officer directs radio waves emitted by a radar gun at a vehicle moving toward the officer. Compared to the emitted radio waves, the radio waves reflected from the vehicle and received by the radar gun have a

a) longer wavelength

b) higher speed

c) longer period

d) higher frequency

A light wave strikes the Moon and reflects toward Earth. As the light wave travels from the Moon toward Earth, the wave carries

a) energy, only

b) matter, only

c) both energy and matter

d) neither energy nor matter

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