What is the name of the invisible line which helps us measure the angle of refraction
Explain how sound travels
What is the scientific name for this part of the ear
What is frequency
What does the amplitude on an oscilloscope trace depend on
What happens to the ear when it hears something of high pitch
What happens to the ear when it hears something loud. Why?
Explain what happens when white light refracts in a rectangular Perspex block
This sound has a high frequency and a high amplitude, what could it be
A violin
A can opener
A horse
An electric toothbrush
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