A car moving at a speed of 20m/s has a kinetic energy of 300,000 J what’s the cars mass

When using two-wire cable to feed a 240-v appliance that does not require a neutral wire, you should a. mark both ends of the white wire green. b. use the cable as is. c. use only the black wire. d. mark both ends and any exposed area of the white wire black.

Zeros that follow non-zeros numbers and are also to the right of a decimal point are significant

What is the final velocity of the initial velocity of 25 and -50?