An engine has an actual efficiency of 0.150. If you put 5200 J of heat into the engine, how much heat will be rejected into the air?

When rust forms on a piece of iron, what evidence do you have that a chemical reaction has taken place?

We measure the loudness of sound in decibels. a. True b. False

You are sitting in the back seat of a taxi. The taxi driver makes a very sharp turn to the left, but maintains a constant speed. Because you are not wearing your seatbelt, you begin to slide to the right.

Downhill skiers race over a course that's 3,500 m long in 2 minutes, 10 seconds. What is their approximate average speed for this course? O A. 1.67 m/s O B. 26.9 m/s O c. 19.2 m/s O D. 1,667 m/s

A boy pulls a wagon with a force of 6N east as another boy pushes it with a force of 4N east. What is the net force

A horse canters away from its trainer in a straight line, moving 37 m away in 9.1 s. It then turns abruptly and gallops halfway back in 1.8 s. Calculate its average speed for the entire trip. Express your answer using two significant figures.

An early submersible craft for deep-sea exploration was raised and lowered by a cable from a ship. When the craft was stationary, the tension in the cable was 7000 N {/rm N}.

What are the components of earths life support system

A car is moving with a velocity (3.0 m/s) € x ˆ + (1.0 m/s) € y ˆ and 3.0 seconds later its velocity is (6.0 m/s) € x ˆ - (3.0 m/s) € y ˆ. What is the direction of the average acceleration of the car?

When water vapor condenses on the inside of a window, the window becomes