Energy And States Of Matter

Question 1

What has chemical energy?

Answer 1

Foods, fuels

Question 2

What has kinetic energy

Answer 2

Running, anything moving

Question 3

What has gravitational energy

Answer 3

Tree
Cloud
Etc

Question 4

What has elastic energy

Answer 4

Spring
Elastic band

Question 5

What has thermal energy

Answer 5

Fire

Question 6

What is the conservation of mass

Answer 6

Energy cannot be destroyed or created but can be transferred, transformed or dispersed

Question 7

What is the equation for power, linking energy and time

Answer 7

Power = energy divided by time
P equals e over t

Question 8

What is the equation got work done

Answer 8

Force x distance

Question 9

What is the equation for efficiency

Answer 9

Useful output energy divided by total input

Question 10

What is the gravitational field strength on earth

Answer 10

9.8 N/KG

Question 11

What is the equation for gravitation potential energy

Answer 11

GPE=MGH
GPE = MASS X GRAVITATION FIELD STRENGTH (9.8) X HEIGHT

Question 12

What is the equation for kinetic energy

Answer 12

1/2 x mass x velocity squared

Question 13

What is the equation for elastic potential energy

Answer 13

Ee = 1/2 x spring constant x extension squared
1/2 x k x e squared

Question 14

What’s the definition of density

Answer 14

The more mass in terms of volume is more dense

Question 15

What is the equation for density

Answer 15

Density = mass/volume
Density = Kg/m cubed or g/cm cubed

Question 16

How would you find the density of a irregular object

Answer 16

Measure mass then Using a displacement beaker, fill with water then place object in and measure excess water that pours out
Then use density equation

Question 17

What’s an independent variable

Answer 17

What you change

Question 18

What’s an dependent variable

Answer 18

What you measure

Question 19

What’s an control variable

Answer 19

What you keep the same

Question 20

What are the 3 errors

Answer 20

Systematic syntax and human

Question 21

What’s are the 3 states

Answer 21

Solid liquid and gas

Question 22

Solid to liquid is?

Answer 22

Melting

Question 23

Liquid to solid is

Answer 23

Freezing

Question 24

Liquid to gas is

Answer 24

Boiling

Question 25

Has to liquid is

Answer 25

Condensing

Question 26

Solid to gas is

Answer 26

Sublimation

Question 27

Describe a solids particles

Answer 27

Fixed position but vibrate

Question 28

Describe a liquids particles

Answer 28

Most are touching and can flow over each other ,fill their container ,stick to bottom

Question 29

Describe gas particles

Answer 29

Free to move , scattered

Question 30

What is the specific heat capacity of a substance ? ( definition)

Answer 30

Amount of energy required to change the temperature of 1 kilogram of the substance by 1 degrees Celsius

Question 31

What is the units of specific heat capacity

Answer 31

J/KG/degrees Celsius

Question 32

What is the equation for specific heat capacity

Answer 32

Change in thermal energy = mass x specific heat capacity x temperature change Delta E = m x c x delta feta

Question 33

What is meant by delta

Answer 33

Change in

Question 34

What is mean by feta

Answer 34

Unknown answer

Question 35

What is the specific latent heat of a substance mean

Answer 35

The specific latent heat of a a substance tells us how much energy is needed to change the state of 1kg of a substance without changing the temperature

Question 36

What is the specific latent heat of fusion

Answer 36

Solid - Liquid , Liquid - Solid Melting and solidifying

Question 37

What is the specific latent heat of vaporisation

Answer 37

Liquid - Gas , Gas - liquid Evaporation/ condensing

Question 38

What is the equation for specific latent heat

Answer 38

Energy = mass x specific latent heat E = m x L

Question 39

What is the equation for pressure

Answer 39

Force / area

Question 40

What 3 thing effect the pressure in a gas

Answer 40

Temperature , volume and amount of gas particles

Question 41

What 2 equation are there for power when thinking about national grid

Answer 41

Power = current x voltage = P = I x v Power = current squared x resistance P = I squared x R

Question 42

What happens when a current flows through a wire and why is the current lowered

Answer 42

Some energy is lost as heat meaning higher current the higher energy loss, therefore the current is made low, but to achieve same power, the supply is boosted

Question 43

What is a step up transformer

Answer 43

Used to increase the voltage massively because the current is low to avoid energy loss as heat

Question 44

What’s a step down transformer

Answer 44

Needed to reduce the voltage that goes to your home because if it’s too high your house will blow up

Question 45

What is carbon capture

Answer 45

Capture carbon for emissions and stores of buries is deep underground

Question 46

Name energy types

Answer 46

Chemical gravitational elastic thermal magnetic nuclear electrostatic

Question 47

What is a system

Answer 47

Object or group of objects

Question 48

What is internal energy

Answer 48

The internal energy is the total amount of kinetic energy and chemical potential energy of all the particles in the system. When energy is given to raise the temperature , particles speed up and gain kinetic energy.

Question 49

What is the kinetic theory

Answer 49

More movement in gas - free to move Liquid - flow, decent movement Solid- fixed position and vibrate