You fill a car with gasoline. The car now has... ( what energy)

An electron and a proton have the same kinetic energy upon entering a region of constant magnetic field and their velocity vectors are perpendicular to the magnetic field. suppose the magnetic field is strong enough to allow the particles to circle in the field. note: you'll need to look up the masses for an electron and proton. 1) what is the ratio of the radii of their circular paths rp/re?

Will you chech and finish these for me, because i am stumped with them.

Using the work energy theorem. what is the velocity of a 850kg car after starting at rest when 13,000j of work is done to it.