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Power of Waves > Waves > Flashcards

Waves Flashcards

1
Q

What is the Conservation of energy?

A

Energy cannot be destroyed or created only converted into other forms of energy.
E.g
Light Bulbs > electrical > light + heat

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2
Q

What is a conductor?

A

Something that conducts heat.

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3
Q

What is an insulator?

A

Something that insulates heat.

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4
Q

What are convection currents?

A

The movement of hot and cold liquids and gases.

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5
Q

Radiation

A

Is the transfer of heat directly from the source to the object by a wave, travelling as Rays. Heat radiation is also known as Infra-Red radiation.

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6
Q

What is sound energy?

A

Sound is a form of energy caused by vibration. The energy created travels as a compression.

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7
Q

Waves

A

Waves transmit energy from one place to another.

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8
Q

Longitudinal wave

A

Longitudinal (compression wave)
E.g
Sound waves

THEY ARE EITHER DOT OR LINED DIAGRAMS NOT WAVEY ONES

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9
Q

Transverse waves

A

Transverse waves
E.g
Water and light waves

NOT DOT OR LINED THEY ARE WAVEY ONES

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10
Q

Name five types of energy

A 
Kinetic-movement 
Chemical-battery 
Heat-sun
Gravitational potential 
Light 
Electrical
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11
Q

Frequency

A

Frequency is the number of times wave vibrates per second.

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12
Q

What is frequency measured in?

A

Hertz (Hz)

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13
Q

High pitched wave

A

Short wave length and high frequency

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14
Q

Wave Equation

A

Speed if any wave can be calculated by:

            V= f /|

           /| =  V
                \_\_\_
                  f

           f =  V
               \_\_\_
                /|

V=velocity (speed) of wave (m/sec)
f=frequency (Hz)
/|=wave length (m)

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15
Q

Wave Equation

A

Frequency (Hz) = S waves
_________________
Time taken for S waves

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16
Q

What is energy measured in?

A

Joules

17
Q

Ultra-sound

A

Ultra-sound is sound with a frequency above the normal range of human hearing, or 20 000 Hz

18
Q

How is Ultra-sound used?

A

Ultrasound is used to detect defaults, wellbeing and gender of a baby in the womb. To locate lost objects,
E.g
MH70

19
Q

What are the main parts of the ear?

A

The outer ear
The middle ear
The inner ear

20
Q

External ear

Pinna

A

The outermost part of the ear

Collects the energy of the vibrating air and tunnels it along the ear canal

21
Q

External ear

Ear canal

A

Thin tube contains wax and tiny hairs

Traps dust and directs sound to the tympanic membrane

22
Q

Middle ear

Tympanic membrane

A

Cone shape membrane

Transmits sound from air to the ossicles

23
Q 
Middle ear
Ear ossicles:
Malleus
Incus
Stapes
A

Connected to the tympanic membrane

Sends vibrations from eardrum to the inner ear

24
Q

Middle ear

Oval window

A

Thin layer of skin at the entrance to the inner ear

Receives vibration from eardrum

25
Q

Middle ear

Round window

A

Tissue membrane

Vibrates with the kinetic energy

Power of Waves (1 decks)

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