Afour-cylinder gasoline engine has an efficiency of 28 % and delivers 280 j of work per cycle per cylinder. a) if the engine runs at 25 cycles per second (1500 rpm), determine the work done per second. b)what is the total heat input per second from the gasoline. c) if the energy content of gasoline is 130 mj per gallon, how long does one gallon last?

Which subatomic particle has a negative charge

Aphoton is absorbed by an electron that is in the n = 3 state of a hydrogen atom, causing the hydrogen atom to become ionized. very far away from the nucleus, the released electron has a velocity of 750,000 m/s. what was the wavelength of the absorbed photon?

Aplayground slide is 8.80 ft long and makes an angle of 25.0° with the horizontal. a 63.0-kg child, initially at the top, slides all the way down to the bottom of the slide. (a) choosing the bottom of the slide as the reference configuration, what is the system's potential energy when the child is at the top and at the bottom of the slide? what is the change in potential energy as the child slides from the top to the bottom of the slide? (include the sign of the value in your answer.)