What is energy efficiency

If someone were to throw an object vertically, and catch it as it returned back down, describe how the velocity vector of this object changes over this period.

What is the recommended daily dosage of flouride for a child over three years of age living in an area where drinking water is free fluoride

Which can occur in a physical change? The mass can increase The particles can arrange in different ways The mass can decrease. The atoms can bond to different atoms.

What is the absolute pressure of the air in your car's tires, in psi, when your pressure gauge indicates they are inflated to 39.0 psi? assume you are at sea level?

Time Intervals in Ice Ages

A heat pump absorbs heat from the atmosphere at a rate of 30 kW. If work is being done to run this heat pump at a rate of 7.7 kW, what is the coefficient of performance (COP) of the heat pump? A) 2.9B) 22C) 0.26D) 3.9E) 4.9

How do astronomers think the sun may have begun

Two identical objects are pressed against two different springs so that each spring stores 55.0J of potential energy. The objects are then released from rest.

As the band passed by, the beating drums and trumpets made Billy feel like his body was beating with the music.

Starting from rest, a solid sphere rolls without slipping down an incline plane. At the bottom of the incline, what does the angular velocity of the sphere depend upon?