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AveGali [126]
3 years ago
11

You put a new battery into your MP3 player and listen to a song. What are the energy transformations taking place in this system

?

Physics
1 answer:
otez555 [7]3 years ago
5 0

Answer:

B. Chemical energy to electric energy to kinetic energy to sound energy

Explanation:

A battery is a device that converts chemical energy, stored in the chemical substance contained inside the battery, into electric energy, by pushing electrons along the circuit at which the battery is connected.

In an MP3 player, this electron (which form an electric current) pass through a sound transducer, which is a device that converts the electric energy of the current into kinetic energy, by producing the vibrations of the loudspeaker (or of the headphones).

As a result, the air surrounding the loudspeakers/headphones start to vibrate, producing sound waves, and the sound that we hear: in this last stage, therefore, kinetic energy has been converted into sound energy.

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A laser beam with a frequency of 180 Hz forms an 8 m standing wave with 10 nodes.
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Answer:33

Explanation:

F = frequency

N =  Node count

w = wave lenght

v = wave velocity

L = distance wave traveled

First find wave length of laser

w = (2/(N))*(L)

w = (2/(10))*(8)

w = 1.6

then using (w), find velocity

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8 0
3 years ago
The manipulation of natural sounds via the medium of magnetic tape is called
alexandr1967 [171]
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3 years ago
50.0 meters away from a building. Tip of the building makes an angle of 63.0° with the horizontal. What is the height of the bui
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Answer:

98.13m

Explanation:

Complete question

Daniel is 50.0 meters away from a building. Tip of the building makes an angle of 63.0° with the horizontal. What is the height of the building

CHECK THE ATTACHMENT

From the figure, using trigonometry

Tan(θ ) = opposite/adjacent

Where Angle (θ )= 63°

Opposite= X = height of the building

Adjacent= 50 m

Then substitute the values we have

Tan(63)= X/50

1.9626= X/50

X= 1.9626 × 50

X= 98.13m

Hence, the height of the building is 98.13m

8 0
3 years ago
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