A 50.0 kg box is pushed along the floor with a force of 85 N. It is moved 8.0 m. How much work was done in moving the box? Formula:
W = Fd
W(lifting) = mgh g = 9.8 m/s^2
P = W/t

Science and technology are interdependent. advances in one lead to advances in the other. give an example of this phenomenon.

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

Explain why electric current cannot exist if a current doesn't have a voltage source.