If a crest with an amplitude of 7 cm interferes with a trough with an amplitude of 10 cm, the resulting wave has an amplitude of:

Avery hard rubber ball (m = 0.5 kg) is falling vertically at 4 m/s just before it bounces on the floor. the ball rebounds back at essentially the same speed. if the collision with the floor lasts 0.05 s, what is the average force exerted by the floor on the ball?

Atomic nuclei of almost all elements consist of

Which levels of government establish and implement educational requirements for minors