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2nd quarter > science > Flashcards

science Flashcards

1
Q

energy possessed by a body by virtue of it’s position

A

potential energy

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2
Q

potential energy influenced by gravity

A

gravitational potential energy

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3
Q

SI unit of potential energy

A

joules(j)

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4
Q

possessed by elastic bodies when they are deformed

A

elastic potential energy

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5
Q

stored in gas when engine starts

A

chemical potential energy

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6
Q

energy tapped from wall sockets to electric devices

A

electric potential energy

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7
Q

formula for Gpe

A

mgh or massgravityheight

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8
Q

formula for epe

A

1/kx^2

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9
Q

formula for k

A

f/x

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10
Q

formula of f

A

f=kx

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11
Q

produced by vibrating matter

A

sound

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12
Q

space without matter

A

vacuum

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13
Q

has particles that sound can travel through

A

medium

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14
Q

6th century-amplitude of a string instrument

A

pythagoras

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15
Q

50BC-vibrating string strikes air sound is not the movement of the air but rather a vibrating body disturbing it’s surroundings

A

aristotle

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16
Q

we hear and perceive as sound

A

vibrations

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17
Q

roman philosopher discovered sound is a wave

A

anicius manlius severinus boethius

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18
Q

invented the tuning fork

A

john shore

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19
Q

used for tuning instruments

A

tuning fork

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20
Q

english mathematician

A

lord rayleigh

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21
Q

austrian physicist

A

ernst mach

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22
Q

german physicist

A

herman von helmholtz

23
Q

we use to produce sound

A

vocal cords

24
Q

sound travels in a series of______and ______

A

compressions and rarefractions

25
Q

pushed:______,pulled:_____

A

compressed,rarefield

26
Q

sound is a

A

longitudinal wave

27
Q

created after pulling and pushing out of a medium

A

longitudinal waves

28
Q

the waves move-_____to motion of material

A

parallel

29
Q

higher temperature the higher the

A

kinetic energey

30
Q

speed of sound at air temp 0 degrees

A

332m/s

31
Q

temperature increases the speed of sound increases by

A

0.6m/s

32
Q

formula for speed of sound

A

v=v0 degree+(0.6ms/c)T or v=332m/s +(0.6*T)

33
Q

formula for speed if wavelenght is given

A

v=(lambda)(f)

34
Q

occurs when sound bounces back

A

reflection of sound

35
Q

reflected sound from surfaces

A

echo

36
Q

used to determine ocean depth

A

sonar

37
Q

sonar stands for

A

sound navigation and ranging

38
Q

speed of waves in a medium is_____the distance between the barrier

A

constant

39
Q

operate and maintain sonar system

A

sonar technicians

40
Q

source is detemined by

A

v=d/t,d=vt,t=d/v

41
Q

The time it takes to travel the distance between
the barrier and source is half of the time.

A

d=vt/2

42
Q

bending of sounds as they travel

A

refraction of sound

43
Q

causes sound to be carried further and heard more during night

A

refraction of sound

44
Q

sound travels faster when_____so curves_____

A

hotter,up

45
Q

sound travels faster when_____so curves_____

A

hotter,down

46
Q

bending of sound around barriers through small openings

A

diffraction of sound

47
Q

overlapping of waves from different sources

A

inteference of sound

48
Q

occurs when two waves combine to make 1 big wave with more amplitude

A

constructive interference

49
Q

occurs when 2 waves combine to produce a wave with smaller amplitude

A

destructive interference

50
Q

contains a microphone that picks up ambient noise

A

noise cancelling head set

51
Q

two or more microphones that receive sound from different directions

A

noise cancelling microphones

52
Q

captures valid noise

A

primary microphone

53
Q

captures background noise

A

secondary microphone

2nd quarter (14 decks)

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