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sergejj [24]
2 years ago
5

Sound waves must have intensity if a person is to hear them. a. True b. False

Physics
2 answers:
BlackZzzverrR [31]2 years ago
7 0
The answer is  
A, True            

Nady [450]2 years ago
6 0

Answer:

a. True

Explanation:

Intensity is what we commonly call Volume, sound waves with no intensity or volume wouldn´t be hearable by humans, so the statement would be True, Sound waves must have intensity if a person is to hear them. The most usual unit to measure sound intencity is Decibels, and  a person with good ears can hear up to -15 dB.

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The Earth and Moon are separated by about 4.0 10^6 m. Suppose Mars is [{MathJax fullWidth='false' 2.9 \times 10^{11} }] m from E
Shalnov [3]

Answer:

a) α=7.9x10^-4 rad

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2 years ago
Tyler drives 50km north. Tyler then drives back 30km south. What distance did he cover? What was his displacement?
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Answer:

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7 0
3 years ago
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here we have

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