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3 years ago

8

A water wave travels 36 meters in 15 seconds. What is the speed of the wave?

2 answers:

Arisa [49]3 years ago

4 0

Since the question above is looking for the SPEEd of the WAVE, the formula that should be used is SPEED = DISTANCE / TIME. You just need to substitute the distance (36 meters) and the time (15 seconds) to the formula. You should be able to get SPEED = 2.4 m/s.

scoundrel [369]3 years ago

4 0

A water wave travels 36 meters in 15 seconds. What is the speed of the wave?

2.4 m/s

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3 years ago

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3 years ago

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Fiesta28 [93]

Answer:

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Explanation:

First of all, we convert the distance from parsec into metres:

$d=30,000 pc =9.26\cdot 10^{20} m$

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$v=0.98 c$

where

$c=3.0 \cdot 10^8 m/s$ is the speed of light. Substituting,

$v=(0.98)(3.0\cdot 10^8)=2.94\cdot 10^8 m/s$

And so, the time taken to complete the journey in the cosmic's ray frame of reference (called proper time) is:

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Converting into years,

$T_0 = \frac{3.15\cdot 10^{12}}{(365\cdot 24\cdot 60 \cdot 60}=99,875 years$

Instead, the time elapsed in the stationary frame of reference is given by Lorentz transformation:

$T=\frac{T_0}{\sqrt{1-(\frac{v}{c^2})^2}}$

And substituting v = 0.98c, we find:

$T=\frac{99,875}{\sqrt{1-(\frac{0.98c}{c})^2}}=501,891 years$

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3 years ago

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garri49 [273]

Answer:

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Explanation:

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a = 4 m/s²

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5 0

3 years ago