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Flashcards in P1.6 Deck (14)
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1
Q

What does Efficiency mean?

A

How good a device is at converting energy into useful forms.

2
Q

What is chemical energy?

A

It is stored in chemical elements/compounds which can be released in a reaction.
e.g. metabolising foods, burning hydrocarbons

3
Q

What is elastic potential energy?

A

Energy stored in a material that has been stretched or compressed which is then released when the constriction is released
e.g. pulled elastic band, stretched metal string

4
Q

What is electrical energy?

A

Flow of electrons in an electric current

5
Q

What is gravitational potential energy?

A

The energy stored in things that can fall, the high the object the more GPE it has.

6
Q

What is kinetic energy?

A

A moving object

7
Q

What is light energy?

A

part of the electromagnetic spectrum and energy is carried by photons. It is emitted by anything at a high temperature.
e.g. sun, light bulb

8
Q

What is nuclear energy?

A

The energy stored in the nuclei of an atom. energy released when atoms undergo a nuclear reaction.
e.g. fission

9
Q

What is sound energy?

A

Carried by the vibrations of sound waves.

e.g. vocal chords, loud speakers

10
Q

What is thermal energy?

A

Energy transferred by heating, the hotter the object the more thermal energy.

11
Q

What is the conservation of energy law?

A

Energy cannot be created or destroyed ( therefore it must be transferred)

12
Q

properties of a dull black shiny surface?

A

Loses energy more quickly
Good radiator/emitter of heat
Good absorber of heat radiation

13
Q

properties of bright shiny surface?

A

poor radiator of heat

poor absorber because it reflects heat radiation away

14
Q

Investigation of heat radiation

A

matt black beaker and silver shiny beaker, compare temp over time of water.