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il63 [147K]
3 years ago
7

a surface recieving sound is moved from it original position to a position three times farther away from the source of the sound

. The intensity of the recieved sound thus becomes
Physics
1 answer:
Delicious77 [7]3 years ago
7 0
Sound intensity = 1/(r^2)

That is Sound intensity is indirectly proportional to  the distance. Therefore, sound becomes 9 times less intense.
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Charlie pulls horizontally to the right on a wagon with a force of 37.2 N. Sara pulls horizontally to the left with a force of 2
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Answer:

The work done on the wagon is 37 joules.

Explanation:

Given that,

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F_n=F-F'

F_n=37.2-22.4

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Work done on the wagon is given by the product of net force and displacement. It is given by :

W=F_n\times d

W=14.8\ N\times 2.5\ m

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So, the work done on the wagon is 37 joules. Hence, this is the required solution.

7 0
3 years ago
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Answer:

The correct option is;

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With such successful design of experiments to replicate the conditions in which life may have first evolved on Earth, it was possible to better explain the hypothesis that life originated from inorganic molecule.

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