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Shtirlitz [24]
3 years ago
14

What is the speed of a wave in (m/s) with a 5 meter wavelength and a period of 20 seconds?

Physics
1 answer:
arlik [135]3 years ago
6 0

Answer: 0.25 m/s

Explanation:  Speed = wavelengt · frequency  

v = λf   and frequency is 1/period  f = 1/T

Then v = λ/T = 5 m / 20 s = 0.25 m/s

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Signment
jeka94

Answer:

v = 5.15 m/s

Explanation:

At constant velocity, the cable tension will equal the car weight of 984(9.81) = 9,653 N

As the cable tension is less than this value, the car must be accelerating downward.

7730 = 984(9.81 - a)

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kinematic equations s = ut + ½at² and v = u + at

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u = 2.65 m/s    the car's initial velocity was upward at 2.65 m/s

v = 2.65 + (-1.95)(4.00)

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