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Flashcards in Chapter 10 Deck (28):
1

Potential Energy

energy that has the potential to do work and so the energy is ‘stored’, such 339as gravitational energy, elastic energy and chemical energy

2

Gravitational energy

energy stored due to the height of an object above a base level

3

Elastic Energy

the potential energy stored in a stretched elastic material

4

Chemical energy

potential energy derived from chemical reactions

5

Electrical energy

the energy made available by the flow of electric charge through a conductor

6

Kinetic energy

energy due to the motion of an object

7

Heat energy

Heat energy (or thermal energy or simply heat) is defined as a form of energy which transfers among particles in a substance (or system) by means of kinetic energy of those particles. ... In physical equations, the amount of heat transferred is usually denoted by the symbol Q.

8

Light energy

Light energy is defined as how nature moves energy at an extremely rapid rate, and it makes up about 99% of the body's atoms and cells, and signal all body parts to carry out their respective tasks. An example of light energy is the movement of a radio signal.

9

Sound energy

Sound is the movement of energy through substances in longitudinal (compression/rarefaction) waves. Sound is produced when a force causes an object or substance to vibrate — the energy is transferred through the substance in a wave.

10

Law of conservation of energy

a law that states that energy cannot be made or lost. However, energy can be transformed from one type to another or transferred from one object to another.

11

Efficiency

the fraction of energy supplied to a device as useful energy. It is usually expressed as a percentage.

12

Thermal energy transfer

Heat may be transferred by means of conduction, convection, or radiation. Conduction is the transfer of thermal energy (heat in transfer) due to collisions between the molecules in the object. Collisions between adjacent atoms and molecules transfer kinetic energy from the warmer to the cooler object.

13

Conduction

transfer of heat through collisions between particles

14

Convection

transfer of heat through the flow of particles

15

Radiation

a method of heat transfer that does not require particles to transfer heat from one place to another

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Reflected

bounced off

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Transmitted

passed through something, such as light or sound passing through air

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Absorbed

taken in

19

Conductor

a material or device that conducts or transmits heat or electricity, especially when regarded in terms of its capacity to do this.

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Insulator

a material that is a poor conductor of heat

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Luminous

releasing its own light

22

Incandescent

describes objects that emit light when they are hot

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Bioluminescent

describes living things that release light energy

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Non-luminous

describes objects that do not emit their own light, but can be seen by reflected light

25

Vibrations

repeated fast, back-and-forth movements

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Compression

the process of pushing a material into itself

27

Rarefaction

in sound waves, the layers of air particles that are spread apart (between compressions)

28

Frequency/Pitch

number of vibrations in one second, or the number of wavelengths passing in one second