random cards :/

Question 1

explain how a force is created in terms of gas particles

Answer 1

in a gas the hotter it is the faster the particles move. the high speed of the particles results in collisions that apply a force across the surface area of the wall

Question 2

describe how a force is created in terms of momentum

Answer 2

as particles collide against a wall a change in momentum occurs. as collisions increase each second momentum changes largely each second. this change results in a force being exerted against the wall of the container. pressure = force/area or pressure is exerted due to the sum of all the collision forces

Question 3

describe how a liquid cools by evaporation

Answer 3

evaporation occurs when more energetic particles escape the surface of the liquid As this happens energy is lost by the liquid. The average kinetic energy of remaining particles decreases meaning that the temperature of the remaining liquid will also decrease

Question 4

F.A.T

factors affecting temperature

Answer 4

• surface area of liquid
• draft above liquid
• temperature of liquid

Question 5

fun facts about pressure

Answer 5

1. increasing temperature of a gas with volume constant will increase the pressure
2. when a gas is compressed its density increases
3. decreasing volume of a gas with temperature constant will increase the pressure

Question 6

what physical properties of a substance can change when it is heated

Answer 6

1. the volume and density

2. the electrical resistance

Question 7

F.I.S

factors increasing sensitivity

Answer 7

1. using a thermometer with a smaller glass bulb
2. using a narrow tube
3. using a glass bulb with a thinner wall
4. elongate the capillary

Question 8

internal energy consists of which 2 types of energy

Answer 8

kinetic

potential

Question 9

what happens to internal energy when a substance is heated

Answer 9

the internal energy will increase as well as the kinetic energy