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Physics > Energy And States Of Matter > Flashcards

Energy And States Of Matter Flashcards

1
Q

What has chemical energy?

A

Foods, fuels

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2
Q

What has kinetic energy

A

Running, anything moving

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3
Q

What has gravitational energy

A

Tree
Cloud
Etc

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4
Q

What has elastic energy

A

Spring
Elastic band

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5
Q

What has thermal energy

A

Fire

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6
Q

What is the conservation of mass

A

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

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7
Q

What is the equation for power, linking energy and time

A

Power = energy divided by time
P equals e over t

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8
Q

What is the equation got work done

A

Force x distance

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9
Q

What is the equation for efficiency

A

Useful output energy divided by total input

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10
Q

What is the gravitational field strength on earth

A

9.8 N/KG

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11
Q

What is the equation for gravitation potential energy

A

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

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12
Q

What is the equation for kinetic energy

A

1/2 x mass x velocity squared

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13
Q

What is the equation for elastic potential energy

A

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

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14
Q

What’s the definition of density

A

The more mass in terms of volume is more dense

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15
Q

What is the equation for density

A

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

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16
Q

How would you find the density of a irregular object

A

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

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17
Q

What’s an independent variable

A

What you change

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18
Q

What’s an dependent variable

A

What you measure

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19
Q

What’s an control variable

A

What you keep the same

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20
Q

What are the 3 errors

A

Systematic syntax and human

21
Q

What’s are the 3 states

A

Solid liquid and gas

22
Q

Solid to liquid is?

A

Melting

23
Q

Liquid to solid is

A

Freezing

24
Q

Liquid to gas is

A

Boiling

25
Q

Has to liquid is

A

Condensing

26
Q

Solid to gas is

A

Sublimation

27
Q

Describe a solids particles

A

Fixed position but vibrate

28
Q

Describe a liquids particles

A

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

29
Q

Describe gas particles

A

Free to move , scattered

30
Q

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

A

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

31
Q

What is the units of specific heat capacity

A

J/KG/degrees Celsius

32
Q

What is the equation for specific heat capacity

A

Change in thermal energy = mass x specific heat capacity x temperature change

Delta E = m x c x delta feta

33
Q

What is meant by delta

A

Change in

34
Q

What is mean by feta

A

Unknown answer

35
Q

What is the specific latent heat of a substance mean

A

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

36
Q

What is the specific latent heat of fusion

A

Solid - Liquid , Liquid - Solid
Melting and solidifying

37
Q

What is the specific latent heat of vaporisation

A

Liquid - Gas , Gas - liquid
Evaporation/ condensing

38
Q

What is the equation for specific latent heat

A

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

39
Q

What is the equation for pressure

A

Force / area

40
Q

What 3 thing effect the pressure in a gas

A

Temperature , volume and amount of gas particles

41
Q

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

A

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

42
Q

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

A

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

43
Q

What is a step up transformer

A

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

44
Q

What’s a step down transformer

A

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

45
Q

What is carbon capture

A

Capture carbon for emissions and stores of buries is deep underground

46
Q

Name energy types

A

Chemical gravitational elastic thermal magnetic nuclear electrostatic

47
Q

What is a system

A

Object or group of objects

48
Q

What is internal energy

A

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.

49
Q

What is the kinetic theory

A

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

Physics (1 decks)

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