Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Physics ie hell > Physics definitions > Flashcards

Physics definitions Flashcards

You may prefer our related Brainscape-certified flashcards:
Physics 101 flashcards AP® Physics flashcards
1
Q

scalar

A

quantity with magnitude only

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

vector

A

quantity with magnitude and direction

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

moment

A

force * perpendicular distance from pivot

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

displacement

A

the shortest distance between 2 points

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

terminal velocity

A

constant maximum velocity of an object when resistive forces balance accelerating forces

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

momentum

A

mass * velocity

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

N2L

A

rate of change of momentum of an object is proportional to the resultant force

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

N3L

A

if body A exerts a force on B, then B exerts and equal and opposite force on A

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

principle of conservation of momentum

A

the vector sum of moments in a system remains constant provided there is no external force

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

elastic collision

A

collision where there is no change in the kinetic energy

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

inelastic collision

A

collision where kinetic energy is lost

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

work

A

magnitude of the force * distance moved in direction of force

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

principle of conservation of energy

A

energy cannot be created or destroyed, only transferred from one form to another

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

potential energy

A

energy possessed by an object due to its position

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

kinetic energy

A

energy possessed by an object due to its velocity

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

elastic potential energy

A

energy possessed by an object when it is deformed by forces acting on it

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

energy

A

the amount to work it can do

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

power

A

energy transferred per second / work done per second

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

Hooke’s law

A

the tension in a spring or a wire is proportional to its extension, provided the extension is not too great

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

spring constant

A

the force per unit extension

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

stress

A

force per cross-sectional area

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
22
Q

strain

A

extension per unit length due to applied stress

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
23
Q

young modulus

A

stress / strain

24
Q

ductile material

A

material that can be drawn into a wire

25
Q

elastic limit

A

point where deformation ceases to be elastic

26
Q

brittle material

A

material with no region of plastic flow

27
Q

black body

A

a body that absorbs all electromagnetic radiation that falls on it and emits all electromagnetic radiation equally

28
Q

Wien’s displacement law

A

the wavelength of peak emission from a black body is inversely proportional to the absolute temperature

29
Q

Stefan’s law

A

P = Aσt^4

30
Q

luminosity of a star

A

the total energy a star emits per unit time

31
Q

intensity

A

I = P / 4πR^2

32
Q

lepton

A

a fundamental particle that does not experience the strong force

33
Q

hadron

A

particles consisting of quarks and antiquarks that experience the strong force

34
Q

baryon

A

a hadron made up of 3 quarks or 3 antiquarks

35
Q

meson

A

a hadron consisting of a quark-antiquark pair

36
Q

electric current

A

rate of flow of electric charge

37
Q

potential difference

A

work done per unit charge moved

V = W / Q

38
Q

Ohm’s law

A

the current in a wire is proportional to the pd provided external conditions remain constant

39
Q

electrical resistance

A

the pd per unit current

R = V / I

40
Q

resistivity

A

the resistance of a 1m length with 1m^2 cross-sectional area

ρ = RA / l

41
Q

emf

A

the energy converted from a form into electrical potential energy per coulomb of charge through the source

42
Q

progressive wave

A

a pattern of disturbances travelling through a medium and carrying energy through it, involving oscillations around their equilibrium positions

43
Q

transverse wave

A

a wave where the particles oscillate at right angles to the direction of travel

44
Q

longitudinal wave

A

a wave where the particles oscillate in the direction of travel

45
Q

polarised wave

A

a transverse wave in which particles only oscillate in one direction

46
Q

in phase

A

two waves that have the same frequency and are in the the same point in their cycles

47
Q

wavelength

A

minimum distance between 2 points on the wave oscillating in phase

48
Q

frequency

A

the number of cycles of a wave that pass a given point in one second

49
Q

speed of a wave

A

the distance that a wave profile moves in a unit time

50
Q

diffraction

A

the spreading out of waves when they meet obstacles

51
Q

the principle of superposition

A

if waves from 2 sources occupy the same region then the total amplitude at any point is the vector sum of the amplitudes at that point

52
Q

phase difference

A

the difference in position of 2 points within a cycle of oscillation

53
Q

coherence

A

waves or wave sources which have a constant phase difference between them

54
Q

stationary wave

A

a pattern of disturbances in a medium in which energy is not propagated, it has nodes where amplitude is 0 and antinodes where amplitude is at a maximum

55
Q

refractive index

A

a measure of optical , ratio of the speed of light in a vacuum to the speed of light in the material

56
Q

Snell’s law

A

n of medium 1 * sin(θ in medium 1) = n of medium 2 * sin(θ in medium 2)

Physics ie hell (1 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions