Assessment prep

Question 1

What is pressure in gas. And the temp

Answer 1

The particles in a solid simply vibrate around a fixed point, the particles in a liquid roll over each other. The particles in a gas are moving very quickly in random directions. The speeds of the particles in the gas vary but, on average, they move quicker than they do in liquids and solids.

Here is the equation for pressure in gas

P1 V1=P2 V2
And the temp will rise and go quicker than solids and liquids

Question 2

What is the changes of state

Answer 2

There are three states of mater

Like solids what are they stick together and they vibrate about a fixed position 
And also they sit very closely together 
apart
The particles of liquid 
are randomly arranged
move around each other
sit close together
The particles in a gas 
They randomly arranged and also they move quickly in all directions and also they are far

Question 3

What is Specific latent heat

Answer 3

The amount of energy needed to melt or vaporise 1 kg at its melting or boiling point

Here is a equation of specific latent heat .

E=m*L

Question 4

What is the structure of the atom

Answer 4

You many know that the atom has a proton,neutron,electron

The protron has
Relative mass of 1
And the relative charge is +1

The neutron
Relative mass
1
Relative charge 0

Electron
Relative mass very small
Relative charge -1

Question 5

What is radiation

Answer 5

The radtion
You have alpha beta and gamma
See this link
http://bit.ly/Alphaandbetaandgammabbcbitesize

Question 6

What is vector and scalar

Answer 6

A physical quantity is something that can be measured. Scalar quantities only have a magnitude or size

And here is some examples

Examples of scalar quantities

Some examples of scalar quantities include:

temperature, eg 10 degrees Celsius (°C)
mass, eg 5 kilograms (kg)
energy, eg 2,000 joules (J)
distance, eg 19 metres (m)
speed, eg 8 metres per second (m/s)
density, eg 1,500 kilograms per metre cubed (kg/m³)

Here is a equation

Calculate the total mass of a 75 kg climber carrying a 15 kg backpack.

75 kg + 15 kg = 90 kg

Subtracting scalars

Scalar quantities can be subtracted by subtracting one value from another.

Example

A room is heated from 12°C to 21°C using a radiator. Calculate the increase in temperature.

21°C - 12°C = 9°C

What is a vector

Vector quantities have both magnitude and an associated direction. This makes them different from scalar quantities, which just have magnitude.

Examples of vector quantities

Some examples of vector quantities include:

force, eg 20 newtons (N) to the left
displacement, eg 50 kilometres (km) east
velocity, eg 11 metres per second (m/s) upwards
acceleration, eg 9.8 metres per second squared (m/s²) downwards
momentum, eg 250 kilogram metres per second (kg m/s) south west
The direction of a vector can be given in a written description, or drawn as an arrow. The length of an arrow represents the magnitude of the quantity. The diagrams show three examples of vectors, drawn to different scales.

Question 7

Distance time graphs

Answer 7

To calculate the distance time graphs represented by the green , from 0 to 4 s

Here is some equations

Charge in distance = (8-0) = 8m
Charge in time = (4-0) = 4 s

Speed = distance / time 
Speed = 8\4 
Speed = 2m/s 

See added link

https://www.bbc.co.uk/bitesize/guides/z2wy6yc/revision/3

Question 8

Speed time graphs

Answer 8

When you have to do speed time graphs

Here is a example

Calculate the speed of the object represented by the green line in the graph, from 0 to 4 s.

change in distance = (8 – 0) = 8 m

change in time = (4 – 0) = 4 s

Speed = distance/time

speed = 8 ÷ 4

speed = 2 m/s

Question 9

Work done

Answer 9

Work done you have do
Work=force*distance

Put when you place it in a triangle you have to place E F*D

When a force causes a body to move, work is being done on the object by the force. Work is the measure of energy transfer when a force (F) moves an object through a distance (d).

So when work is done, energy has been transferred from one energy store to another, and so:

energy transferred = work done

Energy transferred and work done are both measured in joules (J).

Calculating work done

The amount of work done when a force acts on a body depends on two things:

the size of the force acting on the object
the distance through which the force causes the body to move in the direction of the force
The equation used to calculate the work done is:

work done = force × distance