According to the law of reflection,

when two waves meet, they reflect
when two waves meet, they interfere
when a wave meets a boundary, the angle of the reflected wave is equal to the angle of the incident wave
when a wave meets a boundary, the angle of the refracted wave will be equal to the angle of the incident wave

What is the momentum of a 2 kg object moving at 15 meters per second

Which one of the following research methods can show cause and effect

In a heat engine if 1000 j of heat enters the system the piston does 500 j of work, what is the final internal energy of the system if the initial energy was 2000 j? 1. write the equation 2.list out your known variables 3.plug the numbers into the equations 4.solve 5.write your solution statement that includes initial energy and final