A ball of diameter d makes x revolutions when rolling a distance d on the floor. Find the distance d of the ball rolls in terms of d and x.

a small object of mass 3.66 g and charge -17.6 µc is suspended motionless above the ground when immersed in a uniform electric field perpendicular to the ground. what are the magnitude and direction of the electric field?

answer: a) y=-8x+5

a) m= -8

b) m= -2

c) m= 7

d) m= 6

beta is electron from nucleus

something from nucleus has changed, but charge must be same for cons of charge