Calculate the efficiency of an engine if the work input is 300. j and the work output is 100. j

An astronaut weighs 199 lb. what is his weight in newtons?

A simple atwood's machine uses a massless pulley and two masses m1 and m2. starting from rest, the speed of the two masses is 7.7 m/s at the end of 4.3 s.

Because of the curvature of the earth, the maximum distance D that you can see from the top of a tall building of height h is estimated by the formula D = 2rh + h2 where r = 3960 mi is the radius of the earth and D and h are also measured in miles.

Which branch of physics deals with the study of force, energy, and motion?

What is the region where the magnetic force will affect other magnets?

0.2000 kg of water at 20.00°C is contained in a 0.1000-kg copper container. The container is shaken vigorously for 10.00 minutes to cause the temperature to rise to 22.00°C. Calculate the work done on the system and the heat supplied to the system.

Suppose all of the apples have a mass of 0.10 kg and one of the apples in the bowl (C) is 1.0 meter off the ground. If the apple (C) falls from the table, what is the maximum kinetic energy it can gain?

Where would a car traveling on a roller coaster have the most potential energy At the bottom It's always the same At the top Halfway to the top

Is a magnetic reversal a threat to life on Earth? Whay do you say?

What are the adaptions of the tundra