Besides fossil fuels, the only other significant commercial sources of energy are ______________ and ______________.

Currently, in the United States, which sector of the economy uses the most energy?

Currently, in the United States, which fuel has the largest consumption?

The process by which electricity can be generated by using running or falling water is known as

A watt is one ______________ per second.

The bob of a simple pendulum is 0.50 m above the floor at its lowest position. Calculate the maximum speed of the bob when it is held at a maximum height of 2.5 m and released. ​ ​

Although the United States has less than 5% of the world’s population, it accounts for approximately ______________ of the world’s annual consumption of fossil fuels.

A 0.10-kg ball is dropped from a height of 10 m and rebounds to a height of 8.0 m. a. Is energy conserved in the ball? b. If not, how much energy was lost, and what happened to it?

A horsepower is a unit of power equal to 550 ______________.

Given 10 kWh of electricity and assuming no losses, how much work, in joules, could be done?