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kirill [66]
3 years ago
7

What happens when a sound wave passes from water to air?

Physics
2 answers:
atroni [7]3 years ago
6 0

Sound travells much faster in water than in air.

The wave is both reflected and tranmitted. Some goes into the water..and goes FASTER and some bounces back.
s344n2d4d5 [400]3 years ago
4 0
It slows down. The molecules/particles aren't as close together, resulting in slower movement.
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You are driving to the grocery store at 20 m/s. You are 110 m from an intersection when the light turns red. You have a reaction
Lynna [10]

Answer:

a)

reaction time = 0.70 s

distance travelled in reaction time = v*t

= 20 m/s * 0.70 s

= 14 m

So, when brake is applied, distance remaining= 110 m - 14 m = 96 m

Answer: 96 m

b)

vf = 0 m/s

d = 96 m

vi = 20 m/s

use:

vf^2 = vi^2 + 2*a*d

0 = 20^2 + 2*a*96

-400 = 2*a*96

a = -2.08 m/s^2

Answer: -2.08 m/s^2

c)

use:

vf = vi + a*t

0 = 20 - 2.08*t

t = 9.6 s

Answer: 9.6 s

Explanation:

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3 years ago
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Eduardwww [97]

Answer:

C. Both

Explanation:

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Aliun [14]

Answer:

The change in length per unit length per degree rise in temperature of copper is 0.000017k

Explanation:

Given that :

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Explanation:

thats my answer

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