Chapter 10: Mechanical & sound waves

The moving black dot is called:

• a node
• an anti-node
• an anti-amplitude
• the wangy bit

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The stationary dot is called:

• a node.
• an anti-node.
• the amplitude.
• the not moving bit.

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A standing wave is formed on a string.  Which of the following statements is/are true?
∎  Progressive waves are travelling along the string in both directions.
∎  The standing wave is an example of superposition.
∎  The wavelength of the standing wave is d.

• 1, 2 and 3
• Only 1 and 2
• Only 2 and 3
• Only 1

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Standing waves are created by

• Two identical waves reflecting off each other

• Two identical waves being diffracted together

• Two identical waves move through each other in opposite directions

• Two identical waves are diffracted from two identical sources

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In the diagram which letters represent the nodes

• A B C

• A C E

• B D

• B D E

• A C D

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What kind of wave is pictured?

• Transverse
• Longitudinal
• surface
• none of the above

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The lowest point on a wave is the:

• Amplitude
• Crest
• Trough
• Wavelength

What does a wave carry from place to place?

• energy

• matter

• people

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The highest point on a transverse wave is the

• compression

• crest

• rest position

• trough

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The number of waves that pass somewhere in a second is:

• amplitude

• frequency

• wavelength

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