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lianna [129]
3 years ago
14

Which of the following is an example of chemical energy converted into mechanical energy?

Physics
1 answer:
EastWind [94]3 years ago
5 0

Answer:

B

Explanation:

A is wind energy converted to mechanical energy

B is chemical energy stored in food creating energy for movement.

C electric energy to light energy

D building a campfire is chemical energy from burning wood to light energy.

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2 years ago
A tuning fork with a frequency of 512 Hz is used to tune a violin. When played together, beats are heard with a frequency of 4 H
Ganezh [65]

Answer:

<em> 508Hz</em>

Explanation:

A tuning fork with a frequency of 512 Hz is used to tune a violin. When played together, beats are heard with a frequency of 4 Hz. The string on the violin is tightened and when played again, the beats have a frequency of 2 Hz. The original frequency of the violin was ______.

When two sound waves of different frequency approach your ear, the alternating constructive and destructive interference causes the sound to be alternatively soft and loud - this phenomenon is beat production

frequency is the number of oscillation a wave makes in one seconds.

f1-f2=beats

therefore f1=512Hz

f2=?

beats=4Hz

512Hz-f2=4Hz

f2=512-4

f2=508Hz

the original frequency of the violin is 508Hz

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3 years ago
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gayaneshka [121]
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2 years ago
PLEASE HELP 15 POINTS!!!!
goldfiish [28.3K]

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15 degrees Celsius

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