General Revisoin

Question 1

On speed time graphs what do flat sections mean

Answer 1

Stationary

Question 2

On speed time graphs what do ups / downs mean

Answer 2

Constant speed

Question 3

Examples of renewable recourses

Answer 3

Wind, solar, geothermal, hydropower

Question 4

Advantages of renewable energy

Answer 4

Reduces greenhouse gasses
Stable energy prices
Environmentally friendly

Question 5

Disadvantages of renewable energy

Answer 5

Lots of space
Many emit emisiones
Initial cost is high

Question 6

E samples of non renewable energy

Answer 6

Oil
Natural gases
Coal
Nuclear energy

Question 7

Advantages of non renewable energy

Answer 7

Affordable
High in energy

Question 8

Disadvantages of non renewable energy

Answer 8

Pollute environment
Unreliable

Question 9

What are the 8 energy stores

Answer 9

Kinetic
Thermal
Nuclear
Gravitational potential
Electrostatic
Magnetic
Chemical
Elastic potential

Question 10

What are the Energy transfers

Answer 10

Heating
Work done by forces
Work done by electricity

Question 11

Efficiency equation

Answer 11

Efficiency = useful energy in / useful energy out

Question 12

GPE equation

Answer 12

GPE = m x g x h

Question 13

Kinetic energy equation

Answer 13

1/2 x m x v2

Question 14

Acceleration equation

Answer 14

Acceleration = change in velocity / time

Question 15

Scalar def

Answer 15

Only have magnitude

Question 16

Vector def

Answer 16

Has both magnitude and direction

Question 17

Scalar examples

Answer 17

Mass, volume, time, speed, density, energy

Question 18

Vector exsamples

Answer 18

Velocity
Force
Current
Gravity
Momentum
Weight
Acceleration
Displacment

Question 19

Stopping distance equation

Answer 19

Stopping distance = thinking distance + breaking distance

Question 20

Things that affect thinking distance

Answer 20

Drugs
Alcohol
Visibility
Tiredness
Speed
Distractions

Question 21

Things that affect breaking distance

Answer 21

Mass
Wet road
Worn tires
Icy road
Breaks

Question 22

Momentum equation

Answer 22

Momentum = mass x velocity

Question 23

Conservation of mass equation

Answer 23

Total mass before = total mass after

Question 24

Rate of change of momentum equation

Answer 24

Rate of change of momentum = change in momentum / time

Question 25

Recoil def

Answer 25

Momentum is conserved when 2 objects explode apart Momentum in first object must be the same in the second

Question 26

Recoil velocity equation

Answer 26

Recoil velocity = mass x speed

Question 27

Transverse waves def

Answer 27

Particles in a wave oscillate at right angles in the direction the wave travels Eg Electro magnetic, water waves

Question 28

Longitudinal wave def

Answer 28

Particles in a wave oscillate parallel to the wave direction Eg Sound waves, p waves

Question 29

Frequency def

Answer 29

Number of oscillations per second

Question 30

Amplitude def

Answer 30

Maximum displacement from a point of oscillation

Question 31

Wavelength def

Answer 31

Distance between two matching points on naighbouring wave

Question 32

What is frequency measured in

Answer 32

Hertz Hz

Question 33

Amplitude measurements

Answer 33

Decibels

Question 34

Wavelength measurements

Answer 34

Meters k

Question 35

Does a dense material have a small or large wavelength

Answer 35

Small

Question 36

Does the refraction bend towards the normal?

Answer 36

Yes

Question 37

)( What is this kind of lense called?

Answer 37

Concave

Question 38

() What is this kind of lense called?

Answer 38

Convex

Question 39

Properties of concave (diverging) lenses

Answer 39

Virtual Upright Diminished

Question 40

Properties of convex (converging) lenses

Answer 40

Real Magnified Inverted

Question 41

Power of lense equation

Answer 41

Power of lense = 1 / focal length

Question 42

Symptoms of radiation (8)

Answer 42

Hair loss Teeth falling out Cancer Vomiting Death Fever Fatigue Mutation

Question 43

4 types of radiation

Answer 43

Alpha Beta - Gamma Positron

Question 44

Half life definition

Answer 44

Time it takes the number of radioactive nuclei in a sample to decrease by half

Question 45

Example of half life

Answer 45

Carbón 14 has a half life of 5730 years It takes 5730 years for carbon - 14 to decrease by half

Question 46

Facts about beta decay particles (4)

Answer 46

Atomic mass stays the same Atomic number = +1 Weakly ionising Stopped by aluminium

Question 47

Alpha decay properties (4)

Answer 47

Atomic mass = -4 Atomic number = -2 Stoped by paper Can’t pass skin

Question 48

Positron decay properties (4)

Answer 48

Atomic mass stays the same Atomic number = -1 +1 electron Type of antimatter

Question 49

Gamma ray properties (5)

Answer 49

Atomic mass stays the same Atomic number stays the same Part of electromagnetic spectrum Stopped by thick lead Travels at speed of light

Question 50

What is energy measured in

Answer 50

J

Question 51

What are forces measured in?

Answer 51

N