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kompoz [17]
3 years ago
6

A 18-kg sled is being pulled along the horizontal snow-covered ground by a horizontal force of 21 n. starting from rest, the sle

d attains a speed of 1.9 m/s in 8.2 m. find the coefficient of kinetic friction between the runners of the sled and the snow.
Physics
1 answer:
lys-0071 [83]3 years ago
5 0
I dont know and i dont care
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The ceiling of a large symphony hall is covered with acoustic tiles which have small holes that are 4.35 mm center to center. If
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Answer:

The distance between their eye and the ceiling is 33.06 m.

Explanation:

Given that,

The ceiling of a large symphony hall is covered with acoustic tiles which have small holes that are 4.35 mm center to center, D = 4.35 mm

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Wavelength, \lambda=550\ nm

We need to find the distance between their eye and the ceiling. Using Rayleigh criteria, we get the distance as follows :

L=\dfrac{Dd}{1.22\lambda}\\\\L=\dfrac{4.35\times 10^{-3}\times 5.1\times 10^{-3}}{1.22\times 550\times 10^{-9}}\\\\L=33.06\ m

So, the distance between their eye and the ceiling is 33.06 m.

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