Energy

Energy

The ability to do work

Energy units

Joules

kinetic energy

energy of motion

potential energy

Stored energy based on position or chemical composition

What affects KE

Mass and velocity

kinetic energy formula

KE= (mv^2)/2

PE is sometimes referred to as

Gravitational Potential Energy

Weight is in

Newton's

PE formula

PE= w•h

What affects PE

Height and weight

Mechanical energy

The total energy of motion and prostituir of an object

ME can be

All PE, all KE, or some of both

mechanical energy formula

ME= PE+KE

Thermal energy

The total potential and kinetic energy of the particles of an object

Radiant (electromagnetic) energy

Energy that travels in transverse waves

electrical energy

The energy of electric charges

chemical energy

A form of potential energy that is stored in chemical bonds that hold chemical compounds together.

Nuclear energy

Potential energy stored in the nucleus of an atom

Nuclear fission

Nucleus splits

Nuclear fission ex

Not in nature; in nuclear power plants or atomic bombs

Nuclear fusion

Nuclei dude or join together

Ex of nuclear fusion

Stars, sun, nuclear power plant, hydrogen bomb

energy transformation

A change from one form of energy to another

Law of Conservation of Energy

Energy cannot be created or destroyed

In every conversion some energy is always turned into ___ energy

Thermal

nonrenewable resource

a resource that cannot be replaced

Ex of non renewable resources

Fossil fuels like coal petroleum, natural gas), nuclear energy

renewable resource

Can be used and replaced in nature over a relatively short period of time

Ex of renewable resources

Solar, wind , hydroelectric, geothermal, biomass

Nuclear energy is caused by

Changes in the nuclei of atoms

Pros of nuclear energy

Concentrated; no smog

Cons of nuclear energy

Radioactive waste, radioactive elements are unrenewable

Pros of geothermal energy

Almost limitless, power plants require little land

Geothermal energy cons

Only practical near hot spots, waste water can damage soil

Biomass pros

Renewable

Biomass cons

Requires large areas of farmland, produce smoke