2. Jemma stands in the water as waves of amplitude 0.75m pass by. a) A crest passes Jemma's head. The next crest passes two seconds later.
Calculate the frequency of the wave.

1.state2.trash3.the earth

Answer(a)   the matererials that are in contact, the two materials and the nature of their surfaces/// (b)/// the force pushing the two surfaces together, pushing the surfaces together causes the more of the asperities to come together and increases the surface area in contact with each other

Give more info about the experiment