Humans can hear the squeaks and clicks that bats emit while using echolocation to see their surroundings TRUE OR FALSE?

A2 kg ball travellng to the right with a speed of 4 m/s collidees with a 5 kg ball traveling to the left with a speed of 3 m/s. take right to be the positive direction. what is the total momentum of the two balls before they collide? what is the total momentum of the two balls after they collide?

The energy released by a nuclear fusion reaction is produced when

What is the state of matter with a specific volume but no definite shape