An object on earth's surface has a weight of 609 n. what is its mass?
64.6 kg
62.1 kg
63.3 kg
60.9 kg

Which of the following correctly describes the early view of catastrophism?

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.

What kind of simple machine is a catapult?