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finlep [7]
2 years ago
12

A sound wave moving with a speed of 1500 m/s is sent from a submarine to the ocean floor. It reflects off the

Physics
1 answer:
Alekssandra [29.7K]2 years ago
3 0

Answer:

the distance between the submarine and the ocean floor is 11,250 m

Explanation:

Given;

speed of the wave, v = 1500 m/s

time of motion of the wave, t = 15 s

The time taken to receive the echo is calculated as;

time \ of \ motion \ (t) = \frac{total \ distance }{speed \ of \ wave} = \frac{2d}{v}  \\\\2d = vt\\\\d = \frac{vt}{2} \\\\d = \frac{1500 \times 15}{2} \\\\d = 11,250 \ m

Therefore, the distance between the submarine and the ocean floor is 11,250 m

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PLEASE HELP ASAP!!! CORRECT ANSWERS ONLY PLEASE!!! A IS NOT THE CORRECT ANSWER
patriot [66]

Answer: A

<u>Explanation:</u>

NOTES:

d = 650 meters

t = 10 seconds

**********************************

v = d/t

  = 650 meters/10 seconds

  = 65 meters/second

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3 years ago
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vekshin1

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Find the force necessary to start the crate moving, given that the mass of the crate is 32 kg and the coefficient of static fric
fiasKO [112]

Answer:

178.75 N

Explanation:

The force necessary to start moving the crate must be equal to or more than the frictional force (resistive force) acting on the crate but moving in an opposite direction to the frictional force.

So, we find the frictional force, Fr:

Fr = -μmg

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Hence, the force necessary to move the crate must be at least equal to but opposite in direction to this frictional force.

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3 0
2 years ago
An unknown noise is generated in a building. Sound waves move toward an open doorway. Waves of which wavelength would diffract t
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3 years ago
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Find the quotient 3^15 × 3^3
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Answer:

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The Law of Exponents applies here

3^15 x 3^3 is a product, not a quotient

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