an Empty airplane has a mass of 30400 kg and a takeoff acceleration of 1.20 metre per second square what is the net force accelerating the plane

What produces a record of seismic waves? richter scale seismogram barometer seismograph

Ihave a density of 1.61g/cm^3 and a mass of 28g. find the missing value

A14 kg rock starting from rest free falls through a distance of 5.0 m with no air resistance. find the momentum change of the rock caused by its fall and the resulting change in the magnitude of earths velocity. earth mass is 6.0 * 10^24 kg. show your work assuming the rock earth system is closed.