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bija089 [108]
4 years ago
10

Which of the following terms refers to the amount of heat needed to change 1 kg of a substance from a liquid to a gas at its boi

ling point?
A. Specific heat capacity
B. Specific heat of phase changes
C. Latent heat of fusion
D. Latent heat of vaporization
Physics
1 answer:
Nataly [62]4 years ago
8 0
It's B I thinkkkkkkkk
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if the intensity of a person's voice is 4.6 x 10^-7 w/m^2 at a distance of 2.0 m, how much sound power does that person generate
777dan777 [17]

The sound power the person generated is 2.313 \times 10^{-5} \ W.

<h3>Area of the sound wave</h3>

The area of the sound wave is calculated as follows;

A = 4\pi r^2\\\\A = 4 \pi \times (2)^2\\\\A = 50.272 \ m^2

<h3>Power generated</h3>

The sound power the person generated is calculated as follows;

P = I A\\\\P = 4.6\times 10^{-7} \ W/m^2 \ \ \times \ \ 50.272 \ m^2\\\\P = 2.313 \times 10^{-5} \ W

Learn more about intensity of sound here: brainly.com/question/4431819

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2 years ago
An object with a mass of 10 kg is accelerated upward at 2 m/sec2. What force is required?
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Answer:

Answer: Given m = 10 kg and . F = 20 N. Thus, the force required to accelerate the object upward direction is 20 N.

Explanation:

Answer: Given m = 10 kg and . F = 20 N. Thus, the force required to accelerate the object upward direction is 20 N.

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3 years ago
A speaker vibrates at a frequency of 200 hz what is its period
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Period = (1) / (frequency)

Period = (1) / (200 per second)  =  0.005 second  =  5 milliseconds

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