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More cards in this set
Card 16
Front
What does the extent of the spreading depend on?
Back
Card 17
Front
What is the law of reflection?
Back
Card 18
Front
What kind of surfaces produce a strong echoes when soudn waves hit them?
Back
Card 19
Front
What is the definition of virtual images?
Back
Card 20
Front
What are the imaegs reflected from a plane mirror described as? (3)
Back
Card 21
Front
What kind of waves are sound waves?
Back
Card 22
Front
When objects vibrate, what makes the vibration louder on the wave?
Back
Card 23
Front
When objects vibrate, what makes the vibration's pitch higher on the wave?
Back
Card 24
Front
What is the range of human hearing?
Back
Card 25
Front
What is sound with frequencies above 20Khz called?
Back
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