A body of mass 50kg explodes and splits into three pieces, the first piece has mass of 10kg and velocity of [ -18 23 ]m/s and the second piece has mass of 18kg and velocity of [ 25 -18 ]m/s what id is the velocity of the piece.

What are similarities and differences of reflection, refraction, diffraction and absorption?

If an astronaut takes an object to the moon the following is true (choose only one). a the mass will change but the weight will be the same. b both the mass and the weight of the object will be the same. c the weight will change but the mass will be the same. d both the mass and the weight of the object will change.

When you jump from an elevated position you usually bend your knees upon reaching the ground. by doing this, you make the time of the impact about 10 times as great as for a stiff-legged landing. in this way the average force your body experiences is a) less than 1/10 as great. b) more than 1/10 as great. c) about 1/10 as great. d) about 10 times as great.