Exam 4: Work and Energy

One ______________ is equal to one joule per second.

Which of the following is not a scalar quantity?

Which of the following is a vector quantity?

"Ice that burns" is better known as

For which of the following reasons is production of ethanol unwise?

Which of the following is a vector quantity?

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 student weighing 700 N climbs a flight of stairs 5.0 m high in 10 s.What power was required?

When a 6-kg object increases its potential energy by 180 J,approximately how has its position changed?

The two types of mechanical energy are ______________ and ______________.

A student weighing 200 N climbs a flight of stairs 9.0 m high in 4 s.What power is required to perform this task?

When the height of an object is doubled,its gravitational potential energy is increased by a factor of ______________.

The energy of motion is called

A stone is dropped from a bridge 15 m above a river.With what speed does the stone hit the water? ​

Power is

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

A negative potential energy may be made positive by changing the ______________ point.

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?

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

The United States' most abundant fuel supply is ______________.