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Gennadij [26K]
3 years ago
7

A helicopter is ascending vertically with a speed of 5.10m/s. At a height of 105m above the Earth, a package is dropped from a w

indow. How much time does it take for the package to reach the ground? (hint: the package initial velocity equals the helicopter velocity)

Physics
1 answer:
valkas [14]3 years ago
5 0

Op here is another problem exactly like that. Just plug in your variables instead. And remember, time is never negative.

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A sound wave has a speed of 343 m/s in air. What is the wavelength of a sound wave with a frequency of 686 Hz
Svetradugi [14.3K]

Wavelength is the distance between 2 adjacent points in a wave

we can use the following equation to find the wavelength of a sound wave

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substituting the values in the equation

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3 years ago
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3 0
3 years ago
2. Sara y Antonio son mellizos. Cuando nacieron, Sara pesaba 600 gramos más que Antonio. Sus pesos ya se han igualado, gracias a
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Answer:

8,25 creo

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