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Marina CMI [18]
3 years ago
7

A girl kicks a blue ball with a velocity of 20.0 m/s at 65.0o. How long is it in the air?

Physics
1 answer:
34kurt3 years ago
8 0

Explanation:

t = usin©/g

Where t is the time to reach the maximum height

Time spent in air is T = 2t

Hence, T = 2usin©/g

T = 2 x 20 x sin 65°/ 9.8

T = 3.69s

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A strontium vapor laser beam is reflected from the surface of a CD onto a wall. The brightest spot is the reflected beam at an a
sladkih [1.3K]

Answer:

d=1.29*10^{-6}m

Explanation:

From the question we are told that:

Distance of wall from CD D=1.4

Second bright fringe y_2= 0.803 m

Let

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Generally the equation for Interference is mathematically given by

y=frac{n*\lambda*D}{d}

Where

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d=\frac{2*431 *10^{-9}m*1.4}{0.803}

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2 years ago
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Answer:

t=1/4v1

Explanation:

Given data

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Given data

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2 years ago
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Explanation:

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its b

i took the test

Explanation:

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