Physical Science. Energy

Active application

A solar collector on which sunlight heats air, water, or some liquid that is pumped in pipes to generate electricity

Hot, dry rock

Accounts for 85% percent of the total geothermal resources; normally occurs near former volcanic activity

Alternative energy sources are those that _____.

Are not in the wide spread use today.

Natural gas forms in much the same way that petroleum does. The major difference is natural gas forms______.

At higher temperatures

Solar energy is the energy produced directly or indirectly ____.

By utilizing sunlight as an alternative energy source.

Fossil fuels _____.

Contain the stored radiant energy of organisms that lived millions of years ago.

Energy cannot be converted from kinetic to potential energy.

False

Our supply of fossil fuels, such as petroleum and natural gas, is effectively unlimited as technology develops to extract more of it.

False, the amount of fossil fuels is finite. The rate we are using it vastly exceeds the rate of renewal.

Nuclear power produces electricity by using the energy released during_____, which in turns heats water create steam. The steam is used to run turbine.

Fission

Coal, petroleum, and natural gas are examples of _____ fuels. They contain the stored radiant energy from organisms that lived millions of years ago.

Fossil

The unit of work is a Newton-meter. One newton meter is called a ___.

Joule

hot water

Makes up most of the recoverable geothermal resources; results from the convection patterns in groundwater

In a vacuum where air resistance is zero, which variable below has no effort on the final falling velocity of an object?

Mass

matter and energy

Matter can be moving or at rest to supply energy

A force is a result of an interaction that is capable of changing the state of ____ of an object.

Motion

Kinetic energy is defined as the energy of_____.

Motion

dry steam

Occurs rarely and most known examples are in national parks in the United States

Potential energy is the energy due to______.

Position

Work done on an object will increase that amount of energy the object has. The increase in energy can come from increases in_____.

Potential energy, kinetic energy, and temperature or any combination of these.

Work divided by time equals______.

Power

From 1973 to 2011, the U.S economic output increased about 100 percent, and the per capita energy use_____.

Stayed about the same, due to savings from energy efficiency improvements.

Fission

The splitting of larger nuclei into smaller, more stable nuclei.

When energy is_____, work on heating occurs.

Transformed

Geo pressurized resources

Underground collections of hot water that contain dissolved natural gas

solar power

Uses a polycrystalline compound that generates electricity when exposed to light

Passive application

Uses energy flow by natural means without the use of mechanical devices

power tower

Uses thousand of small mirrors focused on a boiler filled with motion salt to generate steam.

Biodiesel, used in Diesel engines, is a _____.

Vegetable-based oil

The conservation of energy is important because we lose most of the potential energy in fuel as____.

Waste heat

Energy is used to do ____ on an object.

Work

Which formula below defines work?

Work= force x distance (W=Fd)

radiant energy

energy carried by an electromagnetic wave

Energy

the ability to do work

Law of Conservation of Energy

the law that states that energy cannot be created or destroyed but can be changed from one form to another