Exam 2: Matter and Energy

Define an atom.

A vapor material exerts a pressure or force ____.

One watt of electrical energy is equal to ____.

Most of the energy we use comes from something we already have on Earth. The only "new" energy we get comes from the ____________________.

Define a molecule.

Heat is a form of energy because of the motion of molecules.

Define power.

One horsepower of work energy equals the amount of work done when lifting ____________________ pounds to the height of ____________________ foot in ____________________ minute.

An example of a fossil fuel is hydrogen.

Define density.

As heat is applied to a closed container containing a gas, the pressure inside the container will decrease.

A material that occupies space and has mass is called ____________________.

Define specific volume.

If the temperature remains constant and the volume that a gas occupies increases, the pressure will ____.

A helicopter is lifting an 800-pound unit at a rate of 200 feet per minute. How many horsepower of work energy is the helicopter using in the process?

____________________ ft-lb of work is accomplished when an 800-lb condensing unit is lifted to the top of a 40-ft building .

The law that states that "energy is neither created or destroyed, but can be converted from one form to another" is called the ____________________.

The unit of measurement of electrical power is the ____________________.

Specific volume is the term used to indicate the space a weight of gas will occupy.