It takes 39.7 n to push a crate at
a constant speed across flat
ground where mk = 0.438.
what is the mass of the crate?
(unit = kg)

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.

If a simple machine reduces the strength of a force, what must be increased?

Scientists follow specific processes in order to determine valid explanations and conclusions from observations. david observed strange lights in the sky above his home outside of roswell, new mexico. the only explanation that makes sense to him is that there are ufos in the area. what should david do next to verify his explanation?