P1

Question 1

Most alpha particles went straight through=

Answer 1

Most of atom is empty space

Question 2

Some positive alpha particles deflected=

Answer 2

Nucleus is positive (repulsion forces)

Question 3

Only few alpha particles deflected=

Answer 3

Small nucleus volume

Question 4

Why do models change over time

Answer 4

New evidence, Inaccurate old models

Question 5

Density

Answer 5

kg/m3 or g/cm3

Question 6

Volume

Answer 6

m3

Question 7

Density of regular shapes

Answer 7

Density= mass/ volume

Question 8

To find mass

Answer 8

Electronic balance

Question 9

To measure length

Answer 9

Ruler

Question 10

To find volume

Answer 10

Length x width x height

Question 11

What can be used to find volume in irregular shapes

Answer 11

Displacement can or measuring cylinder. The water that is displaced (moves up) is the volume of the shape

Question 12

Density of liquid

Answer 12

Density= (Mass of liquid in cylinder-mass of cylinder) divided by volume

Question 13

What state is when the particles are arranged in a regular and fixed pattern?

Answer 13

Solid

Question 14

What state is when particles are packed but disorderly?

Answer 14

Liquid

Question 15

What state is when particles are spread far apart randomly?

Answer 15

Gas

Question 16

Forces of attraction in a solid is

Answer 16

Strong

Question 17

Forces of attraction in a liquid is

Answer 17

Weak

Question 18

Forces of attraction in a gas is

Answer 18

Almost Zero and in most cases, it is zero

Question 19

Solids vibrate in a

Answer 19

Fixed position

Question 20

The motion of liquids is

Answer 20

Interchanging/sliding past eachother

Question 21

What fills the entire volume of the container

Answer 21

Gases

Question 22

Solid to gas is

Answer 22

Sublimation

Question 23

SHC (J/KgoC)

Answer 23

Energy required to raise 1kg of a substance by 1 Celsius

Question 24

SHC equation is

Answer 24

Change in thermal energy divided by (mass x temperature change)

Question 25

If the question included mass=20kg and the unit of answer given is g, you

Answer 25

Convert kg to g by x1000. Always read questions carefully in case you need to convert.

Question 26

To find energy

Answer 26

Current x potential difference x time

Question 27

Limitations of SHC on aluminium block

Answer 27

Heat escapes to surrounding- Insulate it. Part of immersion heater outside, make sure all of heater is in block.

Question 28

Increasing the temperature of a gas causes the

Answer 28

Gas particles to gain kinetic energy

Question 29

Pressure produces to any surfaces a net force at

Answer 29

Right angles

Question 30

Doing work on a gas

Answer 30

Increases temperature and kinetic energy of gas

Question 31

Weight of gases above causes

Answer 31

Atmospheric pressure

Question 32

Pressure in column of liquid

Answer 32

Height x density x gravity(10N/kg)

Question 33

If you push on a sealed syringe plunger

Answer 33

There is a force at 90o to all points on the surface of the liquid

Question 34

Absolute Zero is

Answer 34

273oC

Question 35

Atmosphere pressure is

Answer 35

Gas pressure due to density of air at that height, equal to 100kPa at the surface of earth

Question 36

Pascals is equal to

Answer 36

N/m^2

Question 37

Molecule is

Answer 37

Collection of atoms bonded together

Question 38

Internal energy is

Answer 38

Energy in a substance/system due to the arrangement and movement of particles

Question 39

Specific latent heat of fusion/melting is

Answer 39

Energy require to melt 1kg of substance (without changing temperature)

Question 40

Specific latent heat of vaporisation is

Answer 40

Energy for changing liquid to gas (1kg substance) without changing the temperature)

Question 41

E= m x L

Answer 41

Energy= mass x Specific latent heat

Question 42

Gravitational field strength

Answer 42

N/kg

Question 43

Specific Latent Heat unit

Answer 43

J/kg