At the lowest point in the jump when the student is stationary, the extension of the bungee cord is 35 meteres. The bungee cord behaves like a spring with a constant of 40 N / m. Calculate the energy stored in the stretched bungee cord.

Adding more pulleys to a system of pulleys needed to lift an object. a. increases the force b. decreases the force c. increases the amount of work d. decreases the amount of work

Red light strikes a metal surface and electrons are ejected. if violet light is now used with a 10% greater intensity, what will happen to the ejection rate (number of ejected electrons per second) and the maximum energy of the electrons? a) greater ejection rate; same maximum energyb) same ejection rate; greater maximum energyc) greater ejection rate; greater maximum energyd) same ejection rate; same maximum energye) none of the above answers are correct

The process of a material going through a change of state from a gas to a liquid