Aspeaker fixed to a moving platform moves toward a wall, emitting a steady sound with a frequency of 245 hz. a person on the platform right next to the speaker detects the sound waves reflected off the wall and those emitted by the speaker.
how fast should the platform move, vp, for the person to detect a beat frequency of 3.00 hz?
answer: 4 joules
given: charge = 1c
potential difference = 4v
now, we can find the work done is moving a charge across a potential difference. the formula used is:
work done (w) = charge (q) × potential difference (v)
⇒ work done = 1c×4v
= 4 joules
they usually lose their electrons to the the other element.
peer pressure is a big one