Suppose that John lives on a square block that is 200 meters per side, and in the evenings, he walks with his dog around the block for a little exercise. If John walks once around the block, what distance does he travel? _m If John walks once around the block back to his house, what is his final displacement? _m

Positrons are spontaneously emitted from the nuclei of

1. a camcorder has a power rating of 19 watts. if the output voltage from its battery is 7 volts, what current does it use?answer units 2. a 1.5m wire carries a 6 a current when a potential difference of 57 v is applied. what is the resistance of the wire? yourunits 3. a clothes dryer uses about 2 amps of current from a 240 volt line. how much power does it use? yourunits 4.

Which of these metals are magnetic?