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physics As level cie > defenitions > Flashcards

defenitions Flashcards

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1
Q

Resistance

A

potential difference/ current

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2
Q

pressure

A

force/area

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3
Q

plastic deformation

A

when the load is removed and the object does not return to its original shape or length

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4
Q

power

A

power is the rate of doing work

power = work done/ time

power= energy transfered/ time

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5
Q

spontaneous radioactive decay

A

decay occurs and cannot be affected by external/environmental factors or two stated factors such as chemical/pressure/temperature/humidity

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6
Q

Internal energy

A

sum of potential energy and kinetic energy of atoms or molecules

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7
Q

Thermals equilibrium

A

the condition under which two substances in physical contact with each other exchange no heat energy. They will be at rhe same temperature

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8
Q

Amplitude modulation

A

amplitude of carrier wave varies in synchrony with displacement of inforamtion signal

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9
Q

noise

A

unwanted energy or power that is random

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10
Q

antiquark

A

the anti matter partner of the quark

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11
Q

anti particle

A

the generic term for an anti matter partner of a particle

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12
Q

newtons 1st law

A

a body continues at constant velocity unless acted on by a resultant force

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13
Q

Newtons 2nd law

A

force = rate of change of momentum/ time F=M/A

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14
Q

Newtons 3rd law

A

for every action there is an equal and opposite reaction.

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15
Q

newtons law of gravitation

A

force is proportional to the product of the masses and ivnversly porportional to the square of the seperation

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16
Q

law of conservation of mommentum

A

for a collison occurring between 2 objects ina isolatex systum the total mommentum of both objects before the collision is equal to the total mommentum of the two objects after the collision.

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17
Q

hook’s law

A

the force needed to extend or compress a spring by some distance is proportional to that distance.

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18
Q

electromagnetic waves in order

A

in order of inreasing frequenct

Raging Martians Invaded Venus Using Xray Guns

Radio waves, Microwaves, Infrared, Visible light, Ultraviolet, Xrays, Gamma rays

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19
Q

Acceleration

A

change in velocity/ time taken or rate of change in velocity

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20
Q

frequency of a sound wave

A

20Hz-20KHz

21
Q

wavelength of Gamma Ray

A

less than 0.01nm wavelength

22
Q

wavelength of xray

A

0.01nm- 10 nm

23
Q

wavelength of ultra violet

A

10nm- 400 nm

24
Q

wavelength of visible light

A

400nm-700nm

25
Q

wavelength of infa red

A

700nm-1x10^6nm

26
Q

microwave wavelength

A

1x10^6 nm -1x10^7 nm

27
Q

wavelength of radio wave

A

1x10^7nm - 1x10^9

28
Q

weight equation

A

weight= mass x gravity

29
Q

momentum equation

A

momentum= mass x velocity

30
Q

suvat equation

A 
s=ut + 1/2at
s=1/2(v+u)t
v= u +at
v^2=u^2 + 2as
s=vt - 1\2at^2
31
Q

resistance, voltage, current, power equations ( there are four of them)

A

V=IxR
P=IxV
P=I^2xV
P=V^2/R

32
Q

current charge time equation

A

I=🔺Q/🔺t

33
Q

fundamental wave equation for light waves

A

speed of light= frequency X wavelength

34
Q

work done equation

A

work done = force x distance

35
Q

kinetic energy equation

A

Ke=1/2mv^2

36
Q

denfition of kinetic energy

A

kinetic energy is the energy possessed by virtue of its motion

37
Q

kinteitc energy mommentum mass equation

A

K.E= momentum^2/2xmass

38
Q

relation of ke and wd

A

kinetic energy = work done

39
Q

work done equation using u and v

A

W=1/2mv^2-1/2mu^2

40
Q

what is potential energy

A

the energy possessed by a body by virtue of its positin in afield or state of strain is called potential energy

41
Q

definiton gravitational potential energy

A

the enregy possessed by a body due to its position in the gravtiational field of earth called gravitation potential energy

42
Q

potential energy equation

A

P.E= mgh

43
Q

deffiniton of potential energy of a spring

A

when a spring is streched or compressed from its normal position a restoring force is set up inside the spring

44
Q

spring force equation

A

F=-kx where k is the spring constant and the -ve sign indicates that restoring force is opposite to the displacement

45
Q

total work done on a spring equation

A

work done on a spring = 1/2kx^2

46
Q

conservation of energy

A

energy xan neither be created nor destroyed. it can only be transformed from one form into another withour gain or loss

47
Q

stess equation

A

force/area

48
Q

strain equations

A

strain=🔺L/L

49
Q

young modulus equation

A

stress / strain

physics As level cie (2 decks)

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