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BTEC SCIENCE > Physics > Flashcards

Physics Flashcards

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1
Q

What is kinetic energy and what is it used for

A

The energy of a moving object. It is used move things

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2
Q

What is heat energy and what is it used for

A

It is used to make things hot. It is the thermal energy

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3
Q

What is light energy what is it used for

A

It is the sunlight and it is used for light bulbs and other for light

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4
Q

What is sound energy and what is it used for

A

The energy given of by an object and it is used in musical instruments

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5
Q

What is electrical energy and what is it used for

A

It is the stactic charge and is used for supply of electricity

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6
Q

What is elastic energy and what is it used for

A

It is use to store energy in stretched or squashed objects

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7
Q

What is nuclear energy and what is it used for

A

It is in the nuclei of atoms and is used in nuclear fuel assembly

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8
Q

What is gravitational potential energy and what is it used for

A

It is stored in rocks because of its position. The energy is transferred to kinetic energy when it falls

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9
Q

How does heat move through an object

A

By conduction

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10
Q

What is an example of a good conductor of heat

A

Metal

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11
Q

What is an example of a poor conductor of heat

A

An insulator like glass

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12
Q

What is the process of heat energy

A

The hot particles move to the colder particles and collide

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13
Q

When does convection occur

A

It occurs when particles with lots of heat energy move in a liquid or gas and take the place with less heat energy

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14
Q

What objects have thermal energy

A

All objects

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15
Q

What is another word for thermal radiation

A

Infrared radiation

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16
Q

What objects emit the most amount of radiation

A

The hotter objects

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17
Q

What type of radiation is inferred radiation a type of

A

Electromagnetic radiation

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18
Q

What is sound cause by

A

The movement of particles

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19
Q

An example of vibration

A

A speaker moving in time of the music

20
Q

How does the sound move from place to place

A

The vibration moves through the air until it reaches the ear drum

21
Q

How does electric energy transfer work

A

The battery from the lamp splits two ways to produce light and thermal energy

22
Q

What is energy measured in

A

Jules

23
Q

What is the conservation of energy

A

It can never be lost, destroyed or created. It can can be turned into different forms

24
Q

What is the equation for calculating efficiency

A

Efficiency= useful energy output x 100%

Total energy input.

25
Q

Three types of fossil fuels

A

Coal, oil and natural gas

26
Q

Where the energy stored in fossil fuels come from

A

Sun light

27
Q

How do plants get energy from sunlight

A

Photosynthesis

28
Q

How did the animals become fossil fuel

A

The remains were left under pressure and heated

29
Q

Are fossil fuels renewable or non renewable source of energy

A

Non renewable

30
Q

How do solar cells work

A

They convert light energy into electrical energy

31
Q

What is a positive and a negative of solar panels

A

They do not produce any pollution but they only work when the sun is shining

32
Q

How do wind turbines work

A

They convert kinetic energy into electrical energy

33
Q

What is the amplitude of a wave

A

The maximum height of the wave measured

34
Q

What’s the wavelength of a wave

A

The shortest distance between one point and the same point to the next wave

35
Q

What’s the frequency of a wave

A

The number of waves passing the point every second

36
Q

How do you calculate wave speed

A

Wave speed= frequency x wavelength

37
Q

What do the wave lengths do when it increses

A

It gets shorter with increasing frequency

38
Q

Example of low frequency waves

A

Radio waves

39
Q

Example of a high frequency wave

A

Gamma rays

40
Q

What is the use for radio waves

A

TV and radio signal

41
Q

What’s is the use for microwaves

A

For cooking and satellite transition

42
Q

What’s the use for infrared radiation

A

Cooking and optical fibers

43
Q

What is the use of visuals light

A

Optical fibers and photography

44
Q

What’s is the use of ultra violet

A

Security marking and florist lights

45
Q

What are x rays used for

A

Airport security scanners and medical x rays

46
Q

What are gamma rays used for

A

Sterllising food and killing cancer cells

BTEC SCIENCE (3 decks)

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