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Mrac [35]
3 years ago
11

A sound wave of 70 cm travels 840 m in 2.5 sec. What is the velocity and frequency of sound?

Physics
1 answer:
Darya [45]3 years ago
5 0
-- Speed = (distance) / (time to cover the distance) = 840/2.5 = 336 m/s

-- Frequency = (speed) / (wavelength) = 336/0.70 = 480 Hz. 
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➷ Earth's gravity is approximately 9.81

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3 years ago
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In a transformer, energy is carried from the primary coil to the secondary coil by:________
likoan [24]

In a transformer, energy is carried from the primary coil to the secondary coil by magnetic field in the iron core.

To find the answer, we have to know more about the transformer.

<h3>How transformer works?</h3>
  • An item utilized in the transfer of electric energy is a transformer.
  • AC current is used for transmission.
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Thus, we can conclude that, in a transformer, energy is carried from the primary coil to the secondary coil by magnetic field in the iron core.

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brainly.com/question/26787198

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3 years ago
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B . it should be convert energy.
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