We have a heat engine that produces 150 J of heat, does 40 J of work, and emits 110 J into another system. What is the efficiency of the heat engine? (show you work)

During which of the following activities may in inflatable personal flotation device to be used

The biggest difference between a motor and a generator is that, in a motor, current passes a power source, through the brushes, then the commutator.

In scientific notation, 213,000 is equal to: 2.13 (103) 0 2.13 (104) 2.13 (105) 02.13 (106)

A 4-m * 5-m * 6-m room is to be heated by a base-board resistance heater. It is desired that the resistance heater be able to raise the air temperature in the room from 5 to 25°C within 17 min.

How long till you get a rash in your pants if you poop yourself

Why does a balloon filled with helium rise while a balloon filled with an equal volume of average atmospheric air does not? A. Helium has no mass, but air does. B. Helium increases the balloon's mass more than air. C.

Consider the following controls in an automobile in motion : gas pedal, brake, steering wheel. what are the controls in this list that cause an acceleration of the car?

What material are oil pipelines made from?

3/129 A 175-lb pole vaulter carrying a uniform 16-ft, 10-lb pole approaches the jump with a velocity v and manages to barely clear the bar set at a height of 18 ft. As he clears the bar, his velocity and that of the pole are essentially zero.

A few years ago, Serena Williams dived to hit a tennis ball right after it bounced off the ground. The ball bounced on the ground 10.3 m from the net, and after Serena hit the ball it flew over the 0.