Question
Two tuning forks produce 4 beats per second. If one has
a frequency of 256 Hz, the frequency of the other is:Solution
Beats = |f1 − f2| ⇒ f2 = 256 ± 4 = 252 or 260 Hz.
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A descriptive essay should always be:
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A formal letter should always be:
Tom said that the burglar had come in through the window.
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Select the most appropriate direct form of the given sentence.
A worker told his companion that he was totally exhausted and couldn’t walk anymore.