Physics, 04.02.2020 19:56 Nextlevel3
Cell phones depend on both mechanical and electromagnetic waves to be useful. which answer below correctly identifies how each wave is used in cell phones?
mechanical waves allow the buttons to be pressed to make a call; electromagnetic waves allow a signal to be picked up when making a call
mechanical waves light up the screen; electromagnetic waves create the sound when the phone is ringing
mechanical waves allow the cell phone to emit a sound when ringing; electromagnetic waves allow a signal to be picked up when making a call.
mechanical waves allow a signal to be picked up when making a call; electromagnetic waves allow the cell phone to emit a sound when ringing
Answers: 2
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The number of passengers who arrive at the platform of a subway station for the 10 am train is a random variable with a mean of 120 and a variance of 16. find the lower bound of the probability that there will be between 100 and 140 passengers (round off to second decimal place).
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Which of these has some mechanical energy? a. an atom b. heat inside earth c. a book on a shelf d. the fire from a lit match
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Cell phones depend on both mechanical and electromagnetic waves to be useful. which answer below cor...
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