Physics || P14 - P15

Question 1

Density Formula?

Answer 1

Density =

Mass
———
Volume

Question 2

Thermal Energy Formula?

In Book

Answer 2

Thermal Energy =

Mass x Specific Latent Heat

Q
M L

Question 3

K is?

Answer 3

Spring Constant

Question 4

L is?

Answer 4

Specific Latent Heat

Question 5

Spring Constant Formula?

Answer 5

Spring Constant (K) =

Force (F)
———
Extension (X),

Force measured in Newtons and extension measured in Meters,
Spring constant measured in N/m.

Question 6

Link Between Force and Extension?

Answer 6

Larger force is needed to cause a bigger extension,

More work needed to be done to cause a larger extension,

The force is gravitational force.

Question 7

How To Find Word Done Or Energy Stored On A Graph?

Answer 7

You calculate the area under the linear section of your force-extension graph,

Do this up to the value of force given.

Question 8

Linear Means?

Answer 8

Straight line,

We see this on a graph of force-extension before the elastic limit.

Question 9

Elastic Limit?

Answer 9

This is the point the spring can be stretched to,

If you stretch it past this point, the spring will not return to its original state,

This means the work done is equal to the energy in the ELASTIC POTENTIAL ENERGY STORE.

Question 10

Spring Constant?

Answer 10

Force needed to produce an extension of 1 metre,

Symbol is K.

Question 11

Specific Heat Capacity?

Answer 11

Amount of energy needed to increase temperature of 1kg of substance by 1 degree.

Question 12

Specific Latent Heat?

Answer 12

Amount of energy to make 1kg of substance change state.

Question 13

Triangle Means?

Answer 13

Change In

Question 14

How Is A Stiffer Spring Shown On Graph?

Answer 14

A steeper line.

Question 15

How Is A Rubber Band Shown On. A Graph?

Answer 15

Linear then curves right and then curves upward.

Question 16

Elastic Definition?

Answer 16

When stretched, it will return to its original shape when the forces are removed.

Question 17

Investigating Densities - Core Practical?

Answer 17

We used a displacement can filled with water and a measuring cylinder,

We placed the object into the displacement can,

The amount of water displaced by the object and in the measuring cylinder is the volume of the object,

We can then find the density by Mass / Volume.

Question 18

Solid To Gas?

Answer 18

Sublimation

Question 19

Gas To Solid?

Answer 19

Deposition

Question 20

Liquid To Solid?

Answer 20

Freezing

Question 21

Solid To Liquid?

Answer 21

Melting

Question 22

Liquid To Gas?

Answer 22

Condensing

Question 23

Gas To Liquid?

Answer 23

Evaporation

Question 24

Thermal Energy?

Answer 24

Energy stored in the movement of particles that make up substances.

Question 25

Potential Energy Stores?

Answer 25

How much energy the object has stored,

Used for elastic, kinetic movement, etc.

Question 26

Breaking Intermolecular Bonds?

Answer 26

When you heat a solid, energy is being transferred to potential energy stores,

This energy causes the particles to vibrate or move faster,

When a substance boils or melts, the temperature does not increase because the energy is being used to break intermolecular bonds.

Question 27

Forming Intermolecular Bonds?

Answer 27

The temperature of a substance does not decrease when the particles are forming bonds,

This is because bonds ares forming between particles and the substances temperature doesn’t change until all bonds are formed.

Question 28

Kelvin To Celsius?

Answer 28

Subtract 273,

When K is 0, C is -273.

Question 29

Celsius To Kelvin?

Answer 29

Add 273,

When K is 0, C is -273.

Question 30

Change In Thermal Energy Formula?

Answer 30

Change In Thermal Energy =

Mass x Specific Heat Capacity x Temperature Change,

Mass - kg,
Specific Heat Capacity - J/kg Degrees Celsius,
Temperature Change - Degrees Celsius.

Question 31

Electrically Transferring Energy?

Answer 31

Change doing work against a resistance,

This could be heating and radiation.

Question 32

Closed System?

Answer 32

Doesn’t give energy out of take any energy in.

Question 33

Mechanically Transferring Energy?

Answer 33

This could be pushing or stretching,

Making a movement on an object.