If you have a device that has an energy efficiency of 0.4 and you put in 100 units of energy, how many units of useful energy will you get out of it?

An African Swallow, flying with a horizontal velocity of 80 m/s due North, drops a coconut from a height of 8 m. When does the coconut hit the ground after it is released?

URED What is the main use of freshwater worldwide? O A. Industrial uses, such as manufacturing O O B. Agricultural uses, such as watering crops C. Residential uses, such as bathing and cooking O D. Recreational uses, such as boating and swimmitig

10. A worker uses a pulley system to raise a 24.0 kg carton 16.5 m. A force of 129 N is exerted and the rope is pulled 33.0 m. a. What is the mechanical advantage of the pulley system?

Two clowns are launched from the same spring-loaded circus cannon with the spring compressed the same distance each time. Clown A has a 40-kg mass; clown B a 60-kg mass. The relation between their kinetic energies at the instant of launch is

An 80-kg quarterback jumps straight up in the air right before throwing a 0.43-kg football horizontally at 15 m/s. how fast will he be moving backward just after releasing the ball?

Felix has three metal bowls that are the same shape and size. Felix fills each bowl to the top with boiling water. The first bowl holds 2.5 liters, the second bowl holds 1.0 liter, and the third bowl holds 0.75 liters.

Assume that you are performing general maintenance on your bicycle using a black lubricant. When you lubricate the brake levers, what type of fingerprints are you most likely to leave on them?

Suppose you have 100kg of fresh strawberries. What would be the approximate mass of the strawberries after freeze-drying

A PCV valve is used to control the

When an object has a negative charge, which of these describes the electric field surrounding the object? A. It's neutral. B. It gets stronger away from the object. C. It becomes positive away from the object. D.