Describe how natural and synthetic interact

When many atoms are split in a chain reaction, a large explosion occurs. this is an example of what type of energy conservation

Aboxcar traveling at 12 m/s approaches a string of 5 identical boxcars sitting stationary on the track. the moving boxcar collides and links with the stationary cars and they all move off together along the track. what is the final speed of the cars immediately after the collision? (you may take the mass of each boxcar to be 18,537 kg.)

Aregion of space in which a measurable gravitational force is indicated by the force exerted on a test mass is called