A ball of mass 4 kg falls to the floor; it lands with a speed of 6 m/s. It bounces off with the same speed. Show that its momentum has changed by 48 kg m/s ?​

Asatellite component is in the shape of a cube with 10cm edges, has an evenly distributed mass of 2 kg and one bolt hole at each of four corners. if the maximum predicted random vibration environment is 10 grms, what bolt size would be a good choice for restraint? what other factors might drive bolt size besides force/stress?

A100-watt light bulb illuminates a solar cell. the electricity from the solar cell operates a water pump that delivers 1 watt of power. what is the efficiency of the system?

What is the role of lenses in microscopy?