Pls answer

in the formula:
fm=k m1m2/r2
r is the distance:

a) from the north pole
b) between poles m1 and m2
c) from m1 to the nearest magnetic body
d) between the magnetic lines of force

Using the free-body diagram, calculate the net force acting on the sled. is the sled in a state of dynamic equilibrium?

This is a form of winter precipitation. it is frozen precipitation falling as ice pellets. snowflakes melt into raindrops as they pass through a thin layer of warmer air. the raindrops then refreeze into particles of ice when they fall into a layer of sub-freezing air near the surface of the earth. this precipitation is called a) hail. b) rain. c) sleet. d) snow.

What was the purpose of the apollo program? to put a man in orbit to launch a spy satellite to launch a space station to put man on the moon