Waves in Communication

At what points would you measure the wavelength of a sound wave?

• Crest to Crest

• Rarefaction to Compression

• Compression to Compression

• Rarefaction to Rarefaction

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NGSS.HS-PS4-1

Radio Waves are an example of _________ waves.

• mechanical

• electromagnetic

• light

• sound

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Frequency is always measured in _________

• kilometers

• Hertz

• centimeters

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The electromagnet in a microphone converts the vibrations from sound waves into ______

• different amplitudes of sound

• electric energy

• digital data

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Which wave is pictured?

• Transverse

• Longitudinal

• Both

• Neither

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NGSS.HS-PS4-1

What is transferred from one point to another in a wave?

• Matter

• Light

• Energy

• Magnetism

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Fluctuating electrical impulses cause the strength of the ____________ to change. This causes the diaphragm and speaker to move at different speeds

• air molecules

• permanent magnet

• electromagnet

• modulation

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NGSS.HS-PS2-5

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What kind of wave is this?

• Transverse

• Longitudinal

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NGSS.HS-PS4-1

A mobile phone emits a microwave.

At what distance is the intensity 7.5. ( k=3)

I = k/r²

• 0.48

• 0.63

• 0.75

• 0.54

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NGSS.HS-PS4-5

FM or short-wave local radio is transmitted at 95.2 MHz. What is the radio wavelength? The speed of light is 3 x 10⁸ m/s

V=fλ

• 3.15Km

• 3.15m

• 3,151m

• 3,151,260m

Tags

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