Two spherical objects have equal masses and experience a gravitational force of 85 N towards one another. Their centers are 36 mm apart. (a) Determine each of their masses. (b) Determine the “new” force of attraction if both of the masses are doubled.

In all trials, the magnitude of the final velocity for g1 + g2 was less than the magnitude of any initial velocity. as mass increased, what happened to the velocity? the velocity decreased. the velocity increased. the velocity of g1 + g2 could not be measured. the velocity was not affected by the mass increase.

Apebble is thrown into a calm lake, ripples are formed from the center and move outward. the water particles in the lake travel in a circular pattern that moves up and down on the surface of a lake, and the energy travels a) diagonally. b) downward. c) horizontally. d) upward.

Atomic nuclei of almost all elements consist of