A 1,500-kg car doubles its speed from 50 km/h to 00 km/h . By how times does the kinetic energy from the car's forward motion increase ?

What happens to the light rays when they hit the specimen?

Do you agree with scientist’s prediction about the warming of alaska and other polar regions?

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