This one question is on fotoeletric effect. does the kinetic energy of the ejected electrons from metal depends on the intensity of radiation that is hitting that metal.

In a heat engine if 1000 j of heat enters the system the piston does 500 j of work, what is the final internal energy of the system if the initial energy was 2000 j? 1. write the equation 2.list out your known variables 3.plug the numbers into the equations 4.solve 5.write your solution statement that includes initial energy and final

What is the force that opposes motion and works against the downward pull? a) friction b) gravity c) weight d) acceleration

What distance does a car travel as its speed changes from 0 to 20 m/s in 17 s at constant acceleration?