Wave Motion
Q: The distance a point on a wave moves from its mean position is called?
Did You Know?
The correct answer is 'must'. 'Must' is used for positive deductions when we are almost certain something is true based on evidence. Example: 'She must be tired after working all day.' Other modals: 'can't' is for negative deductions (e.g., 'He can't be the thief'), 'should' expresses expectation (e.g., 'He should arrive soon'), and 'may' indicates possibility. Deduction modals allow us to make informed guesses from clues.
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