Bill has a mass of 85 kg and is skating west. he increases his speed from 3 m/s to 5 m/s by applying a force for 3 seconds. what force did he apply?

To do work, this truck uses energy stored in chemical fuel and an electrical battery. how much total energy does this truck put out?

Unpolarized light falls on two polarizer sheets whose transmission axes are at right angles. a third polarizer is placed between the first two so that its axis makes a 52-degree angle with the axis of the first polarizer. a) what fraction of the incident light intensity is transmitted through the first polaroid? b) what fraction of the incident light intensity is transmitted through the second polaroid? c) what is the angle of polarization of the light that enters the third polaroid? d) what fraction of the incident light intensity is transmitted through the third polaroid. e) what happens if the middle polaroid is removed?

State the following: boyle's law and charle's law