4. An automobile gasoline engine is able to do 225 J of useful work with each stroke of its pistons. If the engine has an efficiency of 29%, what is the amount of work that must be done on
the pistons in the engine?

Select the best definition for wavelength. the height of an oscillating electromagnetic wave the rate at which electromagnetic waves oscillate. the distance between two crests of an electromagnetic wave. the oscillations of electric and magnetic fields select the best definition for frequency. the oscillations of electric and magnetic fields. the height of an oscillating electromagnetic wave. the distance between two crests of an electromagnetic wave. the rate at which electromagnetic waves oscillate