Lesson 7 of 13
Checkpoint: loudness, pitch and hearing
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A sound travels far from a speaker. The same energy spreads over a bigger area. What falls?
A bell makes 12 shakes in 4 s. What is its frequency?
A string has a frequency of 5 Hz. What is its time period?
Note A has a frequency of 200 Hz. Note B has 400 Hz. Which has the higher pitch?
A sound has a frequency of 25 000 Hz. What kind of sound is it?
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