A skater begins moving down a ramp with some unknown speed. She accelerates down the ramp at a rate of 1.4 meters per second^2. It takes the skater 3.2 seconds to
reach the bottom of the ramp, at which time she has a speed of 6.5 meters per second.
Determine the skater's starting speed.

What is the scientific definition of energy that relates to 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

An electromagnet is a device in which moving electric chargers in a coil of wire create a magnet. whats one advantage of using electromagnetic in devices