Experience 2 quiz

Match the following

• Constructive Interference

• 
• Destructive Interference

• 
• Doppler Effect

• 
• Interference pattern

• 
• Diffraction

• 

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HS-PS4-A

HS-PS4-A-3

Mathematical Equivalence

ON

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HS-PS4-A

A standing wave with 4 antinodes and 3 nodes has a wavelength equal to

• L

• 2L

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HS-PS4-A

The wave speed of a rope is proportional to the square of

• the tension in the rope

• the length of the rope

• the materials in the rope

• the thickness of the rope

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HS-PS4-A

The speed of sound in air is ​ (a)   ​ (b)   . Select the number and the unit.

• 343
• 334
• 32

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HS-PS4-A

When two sound waves interfere with each other, loudness is an indication of ​ (a)  

• Constructive Interference
• Destructive Interference
• the doppler effect
• a frequency change

Answer explanation

Sound waves--> Loudness-->Amplitude

Wave Interference is summative. We add the waves together. An increase in amplitude means two waves added together and formed a louder wave.

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HS-PS4-A

HS-PS4-A-3

Reorder these to tell the story about sound going through noise cancelling headphones.

• A microphone "hears" ambient noises

• the listener hears their music, not the noise.

• The ambient noise wave is inverted

• destructive interference occurs prior to reaching the ear

• The speaker transmits the original and inverted waves

Answer explanation

An ambient noise (sound wave) is detected by a microphone. This wave is measured and an inverted wave is produced by the speaker (headset) causing destructive interference to occur, thus the listener hears great music without the noise.

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HS-PS4-A

HS-PS4-A-3

HS-PS4-C-1