Energy Stores And Transfers

Question 1

Name 8 energy stores

Answer 1

Kinetic
Thermal
Chemical
Gravitational potential
Elastic potential
Electrostatic
Magnetic
Nuclear

Question 2

Closed systems?

Answer 2

Where neither matter or energy can enter or leave. The net change of total energy is always zero

Question 3

What transfer is an object moving due to a force acting on it e.g pulling, pushing

Answer 3

Mechanically transferred

Question 4

What transfer is a charge moving through potential difference?

Answer 4

Electrically transferred

Question 5

What transfer is from a hotter object to a colder object e.g heating a pan of water

Answer 5

By heating

Question 6

What transfer is energy transferred by e.g light/sound waves

Answer 6

By radiation

Question 7

What is work done?

Answer 7

Is another way of saying energy transferred. Can be done by a moving charge or by a force moving through an object

Question 8

What is the conservation of energy principle?

Answer 8

Can be transferred usefully, stored, or dissipated but can never be created or destroyed

Question 9

Energy transfer from a falling object

Answer 9

When something falls its gravitational potential energy store is transferred into a Kinetic energy store
Energy lost from gpe store= energy gained from kinetic energy store

Question 10

What is the experiment for specific heat capacity?

Answer 10

To investigate a solid material you will need a block of the material with two holes in it for the heater and thermometer and after water is poured in then measure each side from the same distance each side

Question 11

What happens to energy when it is used?

Answer 11

Energy is never used up; it is transferred between different energy stores and objects.

Question 12

What is an energy store?

Answer 12

An energy store is a way in which energy is held within an object or system.

Question 13

List the eight energy stores you need to know.

Answer 13

• Thermal energy stores
• Kinetic energy stores
• Gravitational potential energy stores
• Elastic potential energy stores
• Chemical energy stores
• Magnetic energy stores
• Electrostatic energy stores
• Nuclear energy stores

Question 14

How is energy transferred mechanically?

Answer 14

By a force doing work.

Question 15

How is energy transferred electrically?

Answer 15

By work done by moving charges.

Question 16

How is energy transferred by heating?

Answer 16

Through thermal contact between objects.

Question 17

How is energy transferred by radiation?

Answer 17

Through light or sound.

Question 18

What is a system in the context of energy transfer?

Answer 18

A system is a single object or a group of objects that are of interest.

Question 19

What occurs when a system changes?

Answer 19

Energy is transferred into or away from the system.

Question 20

What is a closed system?

Answer 20

A closed system is one where neither matter nor energy can enter or leave.

Question 21

What is the net change in energy of a closed system?

Answer 21

The net change in the total energy of a closed system is always zero.

Question 22

Fill in the blank: Energy can be transferred by _______.

Answer 22

[heating]

Question 23

What happens to energy when water is boiled in a kettle?

Answer 23

Energy is transferred to the water’s thermal energy store, causing the temperature to rise.

Question 24

What does it mean to refer to energy in terms of its store?

Answer 24

It means to specify the type of energy, such as saying ‘it has energy in its thermal energy store.’