June 2017 Physics Regents Questions 21-30 Question Preview (ID: 59806)

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An electric toaster is rated 1200 watts at 120 volts. What is the total electrical energy used to operate the toaster for 30. seconds?

a) 1.8 × 10^3 J

b) 3.6 × 10^3 J

c) 1.8 × 10^4 J

d) 3.6 × 10^4 J

What is the rate at which work is done in lifting a 35-kilogram object vertically at a constant speed of 5.0 meters per second?

a) 1700 W

b) 340 W

c) 180 W

d) 7.0 W

When a wave travels through a medium, the wave transfers

a) mass, only

b) energy, only

c) both mass and energy

d) neither mass nor energy

Glass may shatter when exposed to sound of a particular frequency. This phenomenon is an example of

a) refraction

b) diffraction

c) resonance

d) the Doppler effect

Which waves require a material medium for transmission?

a) light waves

b) radio waves

c) sound waves

d) microwaves

Which type of oscillation would most likely produce an electromagnetic wave?

a) a vibrating tuning fork

b) a washing machine agitator at work

c) a swinging pendulum

d) an electron traveling back and forth in a wire

If monochromatic light passes from water into air with an angle of incidence of 35°, which characteristic of the light will remain the same?

a) frequency

b) wavelength

c) speed

d) direction

The absolute index of refraction of medium Y is twice as great as the absolute index of refraction of medium X. As a light ray travels from medium X into medium Y, the speed of the light ray is

a) halved

b) doubled

c) quartered

d) quadrupled

At the instant shown, point P on the rope is moving toward the

a) bottom of the page

b) top of the page

c) left

d) right

When an isolated conductor is placed in the vicinity of a positive charge, the conductor is attracted to the charge. The charge of the conductor

a) must be positive

b) must be negative

c) could be neutral or positive

d) could be neutral or negative

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