P1 Conservation and Dissipation of energy

Question 1

In physics, a system is defined as:

Answer 1

An object or group of objects

Question 2

When a system is in equilibrium, nothing changes and so:

Answer 2

Nothing happens

Question 3

When there is a change in a system, things happen, and when things happen:

Answer 3

Energy is transferred

Question 4

Energy is measured in units of:

Answer 4

joules(J)

Question 5

A thermodynamic system can be:

Answer 5

isolated, closed or open

Question 6

An open system allows:

Answer 6

the exchange of energy and matter to or from its surroundings

Question 7

A closed system can:

Answer 7

exchange energy but not matter to or from its surroundings

Question 8

An isolated system:

Answer 8

does not allow the transfer of matter or energy to or from its surroundings

Question 9

The principle of conservation of energy states that:

Answer 9

Energy cannot be created or destroyed, it can only be transferred from one store to another

Question 10

For a closed system, the total amount of energy is:

Answer 10

constant

Question 11

Kinetic Energy Store:

Answer 11

Moving objects have energy in their kinetic store

Question 12

Gravitational Potential Energy Store:

Answer 12

Objects gain energy in their gravitational potential
store when they are lifted above ground

Question 13

Elastic Energy Store:

Answer 13

Objects have energy in their elastic potential store
if they are stretched

Question 14

Electrostatic Energy Store:

Answer 14

Objects with charge (Like electrons and protons) interacting with one another have energy in their electrostatic store

Question 15

Magnetic Energy Store:

Answer 15

Magnetic interacting with each other have energy
in their magnetic store

Question 16

Chemical Energy Store:

Answer 16

Objects with energy in their chemical store can
release energy in chemical reactions

Question 17

Nuclear Energy Store:

Answer 17

Atomic nuclei release energy from their nuclear
store during nuclear reactions

Question 18

Thermal Energy Store:

Answer 18

All objects have energy in their thermal store, the hotter the object, the more energy it has in this store

Question 19

Mechanical working energy transfer:

Answer 19

When a force acts on an object e.g. pulling,
pushing, stretching, squashing

Question 20

Electrical
working Energy Transfer:

Answer 20

A charge (current) moving through a potential
difference e.g. charge flowing around a circuit

Question 21

Heating by
particles Energy Transfer

Answer 21

Energy is transferred from a hotter object
to a colder one

Question 22

Heating by
radiation

Answer 22

Energy transferred by electromdanetic waves
e.g. Light