physics 1

Question 1

describe solids

Answer 1

regular arrangement, all touching
vibrates
strong and high attraction

Question 2

describe liquids

Answer 2

irregular arrangement and all touching
moves freely
weaker attraction

Question 3

describe gases

Answer 3

irregular not touching
moves freely at high speeds
negligible attraction

Question 4

what is the name of solid to gas

Answer 4

sublimation

Question 5

how is density calculated

Answer 5

mass decided by volume

Question 6

what is the metric for density

Answer 6

kg/m^3

Question 7

what is the metric for volume

Answer 7

m^3

Question 8

how do you measure the volume of an irregular solid

Answer 8

find how much water displaces
- fill the can to the spout, with water
- lower the object into the eureka can and collect the water that leaved the spout into the cylinder
- measure the volume of water displaced by reading the meniscus

Question 9

what are two pieces of equipment what are used to find displacement of water

Answer 9

eureka can
measuring cylinder

Question 10

what happens if u overestimate mass when tryin to calculate density

Answer 10

larger answer
density is proportional

Question 11

what happens if u overestimate volume when tryin to calculate density

Answer 11

answer is smaller
inversely proportional

Question 12

how do you measure the mass of a liquid

Answer 12

• weigh empty, dry cylinder or beaker
• pour liquid into container
• weigh container + liquid
• subtract contianer weight from combined container and liquid weight

Question 13

what’s the setup for doing 5 markers

Answer 13

Values
Equation
Substitute
Rearrange
Answer
Units

Question 14

how do you measure the volume of a liquid

Answer 14

• read the volume from the markings in the measuring cylinder, when on a flat surface
  -make sure it is the meniscus that is read at eye level for accuracy

Question 15

what happens when potential energy rises

Answer 15

particles more further apart
change of state

Question 16

what is internal energy

Answer 16

potential + kinetic energy

Question 17

what happens when kinetic energy rises

Answer 17

increased temperature
particles more / vibrate faster

Question 18

only _________ can change at one time

Answer 18

either potential or kinetic energy

Question 19

change in state equals..?

Answer 19

potential energy

Question 20

remaining state equals..?

Answer 20

kinetic energy

Question 21

P1 x V1 =?

Answer 21

P2 x V2

Question 22

what is ‘work’

Answer 22

transfer of energy by a force

Question 23

what happens when the particles bounce off the walls of the container

Answer 23

they move faster
increases pressure

Question 24

what is boyles law

Answer 24

pressure is inversely proportional to volume at a constant temperature

Question 25

why does a bicycle pump get hot

Answer 25

• more gas in same volume • more frequent collisions • increase in pressure • increase in temperature

Question 26

how do you increase gas pressure

Answer 26

• putting more particles in more collisions • increasing temp hits container harder n more frequently average energy increase

Question 27

what angle is force at on the walls when particles hit

Answer 27

right angles

Question 28

specific latent heat equation

Answer 28

energy (j) x mass (kg) x specific latent heat (j/kg)

Question 29

specific heat capacity equation

Answer 29

energy (j) = mass (kg) x specific heat capacity (j/kg*c) x temperature change (*c)

Question 30

explain the chemical energy store

Answer 30

substances, (foods, fuels) that release energy in a chemical reaction

Question 31

explain the kinetic energy store

Answer 31

moving objects

Question 32

explain the gravitational potential energy store

Answer 32

objects raised above ground

Question 33

explain the elastic potential energy store

Answer 33

stretched or compressed objects

Question 34

explain the thermal energy store

Answer 34

all objects due to particle movement

Question 35

explain the nuclear energy store

Answer 35

the nucleus of atoms

Question 36

explain the electrostatic energy store

Answer 36

separation of charges

Question 37

an objects falls, explain the three transfers

Answer 37

decrease in GPE store increase in KE store waste in energy to environment via heating and sound stores

Question 38

particle diagrams, pos n neg

Answer 38

pos : easy to draw / see arrangement neg : can’t see forces between particles particles look flat rather than 3d movement isn’t shown

Question 39

kinetic models (eg marbles or animation)

Answer 39

pos : easy to see particle arrangement can see the movement of particles neg : can’t see forces between particles

Question 40

measure the vol of small objects

Answer 40

put them in a measuring cylinder w 100cm^3 of water inside read the meniscus to calculate the amount of water displaced

Question 41

internal energy is

Answer 41

the temperature of any substance related to the average speed of its particles

Question 42

why to particles move around

Answer 42

because they have energy in their kinetic stores

Question 43

what energy store increased when particles move further apart

Answer 43

potential energy

Question 44

energy needed to change one kilogram of solid to liquid

Answer 44

specific latent heat of fusion

Question 45

energy needed to change one kilogram of liquid to gas

Answer 45

specific latent heat of vaporisation

Question 46

what is specific heat capacity

Answer 46

the amount of energy needed to change the temperature of 1kg of substance by 1*c

Question 47

1 watt is

Answer 47

1 joule per second

Question 48

how to reduce energy transfers in homes

Answer 48

- double glazing - thick walls - walls made of materials with low thermal conductivity - insulation

Question 49

reducing energy transfer in devices

Answer 49

- lubricator : reduces friction - streamlining : reduces air resistance