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biology > physics > Flashcards

physics Flashcards

1
Q

what are the 2 types of electric charge

A

positive and negative

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2
Q

what happens when you rub balloons to you hair

A

it charges up the balloon

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3
Q

what does an electric field do

A

it pulls things up

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4
Q

whats an gravitatinal field

A

it pulls things down

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5
Q

whats electricity

A

a flow of charge through a circuit

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6
Q

where do electrons get energy from

A

.battery
.cell
.or power supply

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7
Q

what do opposites do

A

attract

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8
Q

why do electrons move from positive to negative

A

because negative electrons are repealed by the negative end of the battery and is attracted to the positive end of the circuit

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9
Q

whats a series

A

a circuit in witch are joined in a single loop

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10
Q

what does parallel mean

A

loops more than one branch in a circuit

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11
Q

what does the PD across each components add up too

A

the PD across the battery

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12
Q

whats an ammeters job

A

to measure an electric current

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13
Q

whats a volmeaters job

A

to record to potential difference

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14
Q
A
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15
Q

whats a current

A

the flow of electrons being taken around the circuit

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16
Q

what does resistance mean

A

is the opposition to the flow of the charge

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17
Q

what directions do all magnetic field lines point

A

south

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18
Q

what is energy measured in

A

kilo jewels (kj)

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19
Q

what cant energy do

A

be created or destroyed

20
Q

what can energy do

A

be transferred from 1 store to another

21
Q

what is atomic/nuclear

A

stored inside atoms

22
Q

whats gravitational potential

A

objects in high positions

23
Q

what does chemical mean

A

food,fuel batterys

24
Q

what does kinetic mean

A

moving objects

25
Q

what does thermal mean

A

hot objects

26
Q

what does elastic potential mean

A

stretched object

27
Q

what can energy be transferred between stores by

A

electricity
light
sound
heating

28
Q

what energy store is a kettle

A

thermal energy store

29
Q

what do you use to measure heat

A

thermometer

30
Q

what does conduction happen in

A

solids

31
Q

what does convection happen in

A

liquids

32
Q

what are non renewable gasses

A

there gasses that run out

33
Q

what are some non renewable gasses

A

fossil fuel
coal
oil

34
Q

what are the advantages of non renewable gasses

A

it generates electricity
dissent release sulfur not expensive

35
Q

what are dis advantages of non renewable gasses

A

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

36
Q

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

A

energy

37
Q

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

A

bottom left: power
bottom right: time

38
Q

what are particals doing inside a blowen up baloon

A

mooving and coliding

39
Q

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

A

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

40
Q

if a balloon was deflated what would the particalls do

A

slow down

41
Q

when do objects float

A

when the upthrust is the same size as the weight

42
Q

what is pressure

A

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

43
Q

the bigger the weight equals to

A

the bigger pressure

44
Q

bigger surface area equals to

A

smaller pressure

45
Q

when do solids not sink

A

when the surface area is the same size as the weight

46
Q

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

A

force

47
Q
A

biology (5 decks)

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