11 What is the frequency of a wave if it's wavelength is 50m, and it is travelling at 2,800,000 m/s?
Give your answer in kHz. *m
(2 Points)

If we decrease the amount of force and keep all other factors the same what will happen to the amount of work

Working alone at its constant rate, pump x pumped out ¼ of the water in a tank in 2 hours. then pumps y and z started working and the three pumps, working simultaneously at their respective constant rates, pumped out the rest of the water in 3 hours. if pump y, working alone at its constant rate, would have taken 18 hours to pump out the rest of the water, how many hours would it have taken pump z, working alone at its constant rate, to pump out all of the water that was pumped out of the tank? a) 6b) 12c) 15d) 18e) 24

Asatellite orbits earth in a circular orbit. does earth's gravity do work on the satellite? explain.