Exam 4: Work and Energy

A mixture of ethanol and gasoline is called

The largest reserve of energy in the United States is in what form?

Work is the process by which energy is ______________.

Which of the following sources of energy presents the fewest pollution problems under normal operating conditions?

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

Potential-energy values may be

In lifting an object,work is done against ______________.

Which of the following is not a unit of work?

The energy of position is called

Power is

The SI unit of power is the ______________.

The time rate of doing work is called ______________.

When the kinetic energy of a simple pendulum decreases,the ______________ of the pendulum increases.

A 2-hp motor can do the same amount of work as a 1-hp motor in ______________ the time. n

Work requires

Which of the following four objects has different kinetic energy?

A 4-kg object falls vertically a distance of 5 m.Its potential energy has changed by approximately how much?

When a moving object's velocity doubles,its kinetic energy increases by a factor of ______________.

A joule/meter (J/m)is a unit of

It is estimated that the global reserve of methane hydrate is ______________ the global reserves of coal,oil,and natural gas.