Conservation of Energy

Question 1

What are the eight main sources of energy?

Answer 1

1. Magnetic
2. Thermal
3. Chemical
4. Kinetic
5. Electrostatic
6. Elastic potential
7. Gravitational potential
8. Nuclear

Question 2

What is Magnetic Energy?

Answer 2

The energy stored when repelling / attracting poles have been pushed closer together / further apart

Question 3

What is internal (thermal) Energy?

Answer 3

The total kinetic and potential energy of the particles in an object

Question 4

What is Chemical Energy?

Answer 4

The energy stored in chemical bonds

Question 5

What is Kinetic Energy?

Answer 5

The energy of a moving object.

Question 6

What is Electrostatic Energy?

Answer 6

The energy stored when repelling / attracting charges have been moved closer together / pulled apart

Question 7

What is Elastic Potential Energy?

Answer 7

The energy stored when an object is stretched or squashed.

Question 8

What is gravitational potential Energy?

Answer 8

The energy of an object at height.

Question 9

What is Nuclear Energy?

Answer 9

The energy stored in the nucleus of an atom.

Question 10

What are the four main pathways?

Answer 10

1. Mechanical Work
2. Electrical Work
3. Heating
4. Radiation

Question 11

What is Mechanical Work?

Answer 11

force moving an object through a distance

Question 12

What is Electrical Work?

Answer 12

charges moving due to a potential difference

Question 13

What is heating?

Answer 13

due to temperature difference caused electrically or by chemical reaction

Question 14

What is radiation?

Answer 14

energy transferred as a wave

Question 15

What is on the y axis and what’s is on the x axis of a distance time graph?

Answer 15

Distance is on the y axis
Time is on the x axis

Question 16

What does Acceleration mean?

Answer 16

The rate of change in velocity

Question 17

What is waste energy?

Answer 17

the energy that is not used by the device for its desired purpose

Question 18

What is stopping distance?

Answer 18

The total distance a car travels from when the driver notices an obstruction to when the car stops.

Question 19

What are 3 advantages of hydroelectricity?

Answer 19

It is renewable
Can increase or decrease energy output
It is cheap to run

Question 20

For a light bulb what is the main ‘wasted’ energy output?

Answer 20

Heat Energy

Question 21

What is the equation that summaries Newtons second law?

Answer 21

Force = mass x acceleration

Question 22

What is work done?

Answer 22

the energy transfer that occurs when a force is used to move an object

Question 23

What does a distance time grape show?

Answer 23

How the distance travelled by an object is affected over time

Question 24

What is a non contact force?

Answer 24

a force which acts on an object without coming into contact with it

Question 25

What is the force that pushes back at an equal force?

Answer 25

Normal Contact Force

Question 26

What happens to the GPE of an object when it falls?

Answer 26

The gravitational potential energy of an object decreases when it falls

Question 27

What is braking distance?

Answer 27

the distance a car travels from when a driver applies the brakes and the car stops moving

Question 28

Is distance a scalar or vector quantity?

Answer 28

Scalar

Question 29

For a light bulb what is the 'useful' energy output?

Answer 29

Light energy

Question 30

What does Kinetic energy store mean?

Answer 30

The energy an object possesses due to a motion

Question 31

What does efficiency mean?

Answer 31

the measure of the proportion of energy that is transferred usefully

Question 32

What does magnetic energy store mean?

Answer 32

the energy stored when repelling magnetic poles are pushed closer together or pulled apart

Question 33

What are two components of stoping distance?

Answer 33

Thinking distance + Braking distance

Question 34

Is air resistant a contact or non contact force?

Answer 34

a contact force

Question 35

How is wind power generated?

Answer 35

By wind turbines that when spun creates energy

Question 36

Is friction a non contact or contact force?

Answer 36

contact force

Question 37

Is tension a contact or non contact force?

Answer 37

contact force

Question 38

What is wave power?

Answer 38

The water in the sea rises and falls because of waves on the surface this creates kinetic energy that drives electricity generators

Question 39

What energy transfer takes place when generating wind power?

Answer 39

Kinetic energy

Question 40

What is the difference between speed an velocity?

Answer 40

Speed is scalar Velocity is a vector and only tells you the direction

Question 41

What is Newton's first law?

Answer 41

A resultant force is required to change the motion of an object

Question 42

What is dissipated energy?

Answer 42

Energy that is lost in the surroundings

Question 43

What is a vector quantity?

Answer 43

have magnitude and direction

Question 44

Is magnetic force a contact or non contact force?

Answer 44

Non-Contact

Question 45

What are 3 types of fossil fuels and their states?

Answer 45

Coal (solid) Crude oil (liquid) natural gas (gas)

Question 46

What are 3 disadvantages of fossil fuels?

Answer 46

Limited resources produce carbon dioxide produce toxic gas when burned

Question 47

Is velocity a scalar or vector quantity?

Answer 47

Vector

Question 48

What are 2 advantages of nuclear energy?

Answer 48

Don't produce any pollutants Can be used in any conditions

Question 49

What is a scalar quantity?

Answer 49

only have magnitude

Question 50

What is a electrostatic store?

Answer 50

energy stored when repelling charges have been moved closer together or pulled apart

Question 51

What is the formula for velocity?

Answer 51

velocity = displacement / time

Question 52

What energy resource is most widely used to power vehicles?

Answer 52

Types of crude oil

Question 53

What are the units for kinetic energy?

Answer 53

Joules

Question 54

What is the conservation of energy law?

Answer 54

energy can be transferred but can never be created