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S3 Physics 2022 > Waves > Flashcards

Waves Flashcards

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1
Q

How are sound waves produced

A

They are produced mechanically

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2
Q

how do you measure the speed of sound

A

S= D / T

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3
Q

what is the relationship between frequency and pitch

A

They both are how many waves are in a bar

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4
Q

What’s the relationship between the amplitude of and volume of loud notes and quite notes

A

the Relationship is how high the waves are

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5
Q

true or false? transverse waves are perpendicular at the right angles

A

true

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6
Q

do sound have different frequency

A

yes they do

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7
Q

true or false waves are movements of sound

A

false

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8
Q

describe longitudinal waves

A

in longitudinal waves the substance moves parallel to the direction of the motion of the wave

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9
Q

What level of volume can begin to damage your hearing?

A

Any sound(s) over 100 dB can damage our hearing.

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10
Q

What is the range of human hearing?

A

20Hz - 20,000Hz

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11
Q

What is the formula for wavelength

A

Wavelength = velocity divided by frequency

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12
Q

What makes a sound an “Ultrasound”

A

Any sound that is over 20,000Hz is an Ultrasound

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13
Q

Are there any methods of reducing noise level?

A

Use items such as sound dampening foam or use a pair of noise cancelling headphones that will produce a mirror of unwanted noise that will cancel it.

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14
Q

What can ultrasound be used for?

A

Imaging babes in a whom, imaging kidney stones and breaking-down kidney stones

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15
Q

what is the threshold for hearing?

A

0dB

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16
Q

What is the unit for time

A

Seconds

17
Q

State the units of wavelength.

A

Metre

18
Q

what is the range of human hearing ?

A

(20-20,000Hz).

19
Q

What formula do you use to calculate the frequency from the period

A

Frequency = 1 over period (F = 1/T)

20
Q

What is the wave speed?

A

Distance travelled by a wave per second.

21
Q

What is the equation for wavelength?

A

v=d/t

22
Q

What is frequency?

A

Number of waves per second.

23
Q

What is the symbol and units for frequency?

A

Symbol=F, units=Hertz(Hz).

24
Q

What is the term period as the time taken for one wave to pass a fixed point

A

Frequency

25
Q

What is the period of a wave from a graph

A

The time period for one of the things from a cycle

S3 Physics 2022 (2 decks)

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