When earth and the moon are separated by a
distance of 3.84 × 10^8 meters, the magnitude of
the gravitational force of attraction between
them is 2.0 × 10^20 newtons. what would be the
magnitude of this gravitational force of attraction
if earth and the moon were separated by a
distance of 1.92 × 10^8 meters?
(1) 5.0 × 10^19 n (3) 4.0 × 10^20 n
(2) 2.0 × 10^20 n (4) 8.0 × 10^20 n

Gasoline comes from petroleum, which is made from ancient living things. petroleum, therefore, contains a type of energy. a. heat b. nuclear c. biological d. chemical potential

How can waves travel through ground?

Two cannon balls weighing 18 kg and 24 kg are chained together and fired horizontally with a velocity of 165 m/s from the top of a 21-m wall. the chain breaks during the flight of the cannonballs and the 18-kg cannonball strikes the ground at t = 1.5 s, at a distance of 240 m from the foot of the wall, and 7 m to the right of the line of fire. determine the position of the other cannonball at that instant. neglect the resistance of the air.