physics

Question 1

what are the 2 types of electric charge

Answer 1

positive and negative

Question 2

what happens when you rub balloons to you hair

Answer 2

it charges up the balloon

Question 3

what does an electric field do

Answer 3

it pulls things up

Question 4

whats an gravitatinal field

Answer 4

it pulls things down

Question 5

whats electricity

Answer 5

a flow of charge through a circuit

Question 6

where do electrons get energy from

Answer 6

.battery
.cell
.or power supply

Question 7

what do opposites do

Answer 7

attract

Question 8

why do electrons move from positive to negative

Answer 8

because negative electrons are repealed by the negative end of the battery and is attracted to the positive end of the circuit

Question 9

whats a series

Answer 9

a circuit in witch are joined in a single loop

Question 10

what does parallel mean

Answer 10

loops more than one branch in a circuit

Question 11

what does the PD across each components add up too

Answer 11

the PD across the battery

Question 12

whats an ammeters job

Answer 12

to measure an electric current

Question 13

whats a volmeaters job

Answer 13

to record to potential difference

Question 15

whats a current

Answer 15

the flow of electrons being taken around the circuit

Question 16

what does resistance mean

Answer 16

is the opposition to the flow of the charge

Question 17

what directions do all magnetic field lines point

Answer 17

south

Question 18

what is energy measured in

Answer 18

kilo jewels (kj)

Question 19

what cant energy do

Answer 19

be created or destroyed

Question 20

what can energy do

Answer 20

be transferred from 1 store to another

Question 21

what is atomic/nuclear

Answer 21

stored inside atoms

Question 22

whats gravitational potential

Answer 22

objects in high positions

Question 23

what does chemical mean

Answer 23

food,fuel batterys

Question 24

what does kinetic mean

Answer 24

moving objects

Question 25

what does thermal mean

Answer 25

hot objects

Question 26

what does elastic potential mean

Answer 26

stretched object

Question 27

what can energy be transferred between stores by

Answer 27

electricity light sound heating

Question 28

what energy store is a kettle

Answer 28

thermal energy store

Question 29

what do you use to measure heat

Answer 29

thermometer

Question 30

what does conduction happen in

Answer 30

solids

Question 31

what does convection happen in

Answer 31

liquids

Question 32

what are non renewable gasses

Answer 32

there gasses that run out

Question 33

what are some non renewable gasses

Answer 33

fossil fuel coal oil

Question 34

what are the advantages of non renewable gasses

Answer 34

it generates electricity dissent release sulfur not expensive

Question 35

what are dis advantages of non renewable gasses

Answer 35

will run out increases global warming releases carbon dioxide toxic waste in environment

Question 36

what goes at the top of an equation triangle including time power and energy

Answer 36

energy

Question 37

what goes bottom left and right on a equation triangle including power time and energy

Answer 37

bottom left: power bottom right: time

Question 38

what are particals doing inside a blowen up baloon

Answer 38

mooving and coliding

Question 39

how would you work out the power if the time was 40 sec and the energy was 70 j

Answer 39

firstly you ewould do energy devided by time as thats how it is on the triangle so it would be 70 divided by 40 wich is 1.75

Question 40

if a balloon was deflated what would the particalls do

Answer 40

slow down

Question 41

when do objects float

Answer 41

when the upthrust is the same size as the weight

Question 42

what is pressure

Answer 42

Pressure is a measure of how much force is applied over a certain area

Question 43

the bigger the weight equals to

Answer 43

the bigger pressure

Question 44

bigger surface area equals to

Answer 44

smaller pressure

Question 45

when do solids not sink

Answer 45

when the surface area is the same size as the weight

Question 46

what goes at the top of the equation triangle if the units are force pressure and surface area

Answer 46

force