The human body is 65% oxygen by mass. If a person has a mass of 75.0 kg, what is the mass oxygen in his body?

Brandi poses as Lady Justice for a skit in her government class. She holds a set of scales above her head with her right hand and a sword by her side in her left hand. She holds the pose for 10 minutes.

How much work is needed to lift a 3kg create a vertical displacement of 22m

An object falls for 1.7 seconds. Assuming uniform acceleration, how far has it moved?

A 513 g ball strikes a wall at 14.7 m/s and rebounds at 11.3 m/s. The ball is in contact with the wall for 0.038 s. What is the magnitude of the average force acting on the ball during the collision? Answer in units of N.

Two children weighing 15 and 25 kilograms are sitting on opposite sides of a seesaw, both 2 meters from the axis of rotation.

A herringbone or tire track pattern on a radiograph is a result of

A 7150-kg railroad car travels alone on a level frictionless track with a constant speed of 24.5 m/s. A 3100-kg load, initially at rest, is dropped onto the car What will be the car's new speed?

How is friction related to conservation if mechanical energy?

Does the ear drum vibrates when struck by sound waves and directly sends a message to the brain that is then recognized as sound?

Think of an example that you could use to convice a friend that an object at rest has an "internal hold back property" that is different from a frictional force or the force of the earth's gravity.