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:

In raising a 6200-n piano with a pulley system, the movers note that, for every 2.2 m of rope pulled down, the piano rises 0.12 m . ideally, find the force required to lift the piano.

Aweight lifter raises a 1600 n barbell to a height of 2.0 meters. how much work was done? w = fd question 6 options: 3000 joules 30 joules 320 joules 3200 joules

Do you agree with scientist’s prediction about the warming of alaska and other polar regions?