Physics

Question 1

What is kinetic energy and what is it used for

Answer 1

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

Question 2

What is heat energy and what is it used for

Answer 2

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

Question 3

What is light energy what is it used for

Answer 3

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

Question 4

What is sound energy and what is it used for

Answer 4

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

Question 5

What is electrical energy and what is it used for

Answer 5

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

Question 6

What is elastic energy and what is it used for

Answer 6

It is use to store energy in stretched or squashed objects

Question 7

What is nuclear energy and what is it used for

Answer 7

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

Question 8

What is gravitational potential energy and what is it used for

Answer 8

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

Question 9

How does heat move through an object

Answer 9

By conduction

Question 10

What is an example of a good conductor of heat

Answer 10

Metal

Question 11

What is an example of a poor conductor of heat

Answer 11

An insulator like glass

Question 12

What is the process of heat energy

Answer 12

The hot particles move to the colder particles and collide

Question 13

When does convection occur

Answer 13

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

Question 14

What objects have thermal energy

Answer 14

All objects

Question 15

What is another word for thermal radiation

Answer 15

Infrared radiation

Question 16

What objects emit the most amount of radiation

Answer 16

The hotter objects

Question 17

What type of radiation is inferred radiation a type of

Answer 17

Electromagnetic radiation

Question 18

What is sound cause by

Answer 18

The movement of particles

Question 19

An example of vibration

Answer 19

A speaker moving in time of the music

Question 20

How does the sound move from place to place

Answer 20

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

Question 21

How does electric energy transfer work

Answer 21

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

Question 22

What is energy measured in

Answer 22

Jules

Question 23

What is the conservation of energy

Answer 23

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

Question 24

What is the equation for calculating efficiency

Answer 24

Efficiency= useful energy output x 100%

Total energy input.

Question 25

Three types of fossil fuels

Answer 25

Coal, oil and natural gas

Question 26

Where the energy stored in fossil fuels come from

Answer 26

Sun light

Question 27

How do plants get energy from sunlight

Answer 27

Photosynthesis

Question 28

How did the animals become fossil fuel

Answer 28

The remains were left under pressure and heated

Question 29

Are fossil fuels renewable or non renewable source of energy

Answer 29

Non renewable

Question 30

How do solar cells work

Answer 30

They convert light energy into electrical energy

Question 31

What is a positive and a negative of solar panels

Answer 31

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

Question 32

How do wind turbines work

Answer 32

They convert kinetic energy into electrical energy

Question 33

What is the amplitude of a wave

Answer 33

The maximum height of the wave measured

Question 34

What’s the wavelength of a wave

Answer 34

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

Question 35

What’s the frequency of a wave

Answer 35

The number of waves passing the point every second

Question 36

How do you calculate wave speed

Answer 36

Wave speed= frequency x wavelength

Question 37

What do the wave lengths do when it increses

Answer 37

It gets shorter with increasing frequency

Question 38

Example of low frequency waves

Answer 38

Radio waves

Question 39

Example of a high frequency wave

Answer 39

Gamma rays

Question 40

What is the use for radio waves

Answer 40

TV and radio signal

Question 41

What’s is the use for microwaves

Answer 41

For cooking and satellite transition

Question 42

What’s the use for infrared radiation

Answer 42

Cooking and optical fibers

Question 43

What is the use of visuals light

Answer 43

Optical fibers and photography

Question 44

What’s is the use of ultra violet

Answer 44

Security marking and florist lights

Question 45

What are x rays used for

Answer 45

Airport security scanners and medical x rays

Question 46

What are gamma rays used for

Answer 46

Sterllising food and killing cancer cells