Suppose a ball is dropped from a height onto a spring. The spring is compressed by the falling ball and the relaunches the ball into the air. Will the ball bounce higher, lower, or to the same height? Ignore friction.
a) The answer cannot be determined from the info.
b) higher
c) the same height
d) lower

increase masses, decrease separation

the minimum amperage that the current in this wire would have to have so that its weight is completely supported by the magnetic force due to earth's field, assuming that no other forces except gravity act on it

305.7

explanation:

density =m/v

density =917/3.00

density = 305.

approximately = 305.7

in four significant figures