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qaws [65]
3 years ago
11

5. A person fishing from a pier observes that four wave crests pass by in 7.0 s and estimates that the distance between two succ

essive crests is 4.0 m. The timing starts with the first crest and ends with the fourth. What is the speed of the wave? BBoldIItalicsUUnderlineBulleted listNumbered listSuperscriptSubscript

Physics
1 answer:
TiliK225 [7]3 years ago
3 0

Answer:

v= 1.71 m/s

Explanation:

Given that

Distance between two successive crests = 4.0 m

 λ = 4 m

T= 7 sec

T is the time between 3 waves.

3 waves = 7 sec

1 wave = 7 /3 sec

So t= 7/3 s

We know that frequency f

f= 1/t= 3/7 Hz

Lets take speed of the wave is v

v= f λ

f=frequency

λ=wavelength

v= 3/7 x 4 = 12 /7

v= 1.71 m/s

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A hawk leaves its nest in Fort Worth and travels 3,000 meters east. After snacking on a tasty rodent the hawk flies another 1,50
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A ball is tossed straight up from the surface of a small, spherical asteroid with no atmosphere. The ball rises to a height equa
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Answer:

d. equal to one-fourth the acceleration at the surface of the asteroid.

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The explanation is attached as a picture with this answer

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as it can be seen in the explanation that the proportional form of the equation is used because we do not need to necessarily use to final form with "G" for comparison calculations.

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4 0
3 years ago
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4. O/N 15/P11/Q11
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Answer:

B) 4500 Pa

Explanation:

As pressure is force per unit area,

P = F/A

It stands to reason that the smallest pressure for a given force is when it is shared by the largest area.

The possible areas are

0.30(0.40) = 0.12 m²

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0.40(0.50) = 0.20 m²

The pressure when the face with the largest area (0.20 m²) is down is

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the other possible pressures would be

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which are both larger than our solution.

5 0
3 years ago
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