Atuning fork vibrating in the air produces sound waves. these waves are best classified as

Which explanation describes the forces involved for a person to walk down the sidewalk? a. the person's feet push backward on the sidewalk; the sidewalk pushes backward on the person. b. the person's feet push forward on the sidewalk; the sidewalk does not push on the person. c. the person's feet push backward on the sidewalk; the sidewalk pushes forward on the person. d. the person's feet push forward on the sidewalk; the sidewalk pushes forward on the person.

The built in flash in a compact camera is usally capable of giving correct exsposure for distance up to how many meters?

Acamcorder has a power rating of 20 watts. if the output voltage from its battery is 9 volts, what current does it use?