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Dahasolnce [82]
3 years ago
7

An airplane starts at rest and accelerates down the runway for 25 s. At the end of the runway, its final velocity is 75 m/s east

. What is its acceleration?
Physics
1 answer:
elena-s [515]3 years ago
7 0

Answer

3m/s²

Explanation

u=o

t=25s

v=75m/s

from Newton's first law of motion,

v=u+at

75=0+a(25)

75=25a

a= 75/25

a=3m/s²

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At what angle should the axes of two polaroids be placed so as to reduce the intensity of the incident unpolarized light to 13.
prohojiy [21]

Answer:

θ = 66.90°

Explanation:

we know that

I= \frac{I_0}{2}cos^2\theta

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putting vales we get

1= \frac{13}{2}cos^2\theta

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therefore θ = 66.90°

5 0
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Answer:

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So, When frequency increases in the second case, more wave crests pass a fixed point each second. That means the wavelength shortens. So, as frequency increases, wavelength decreases. The opposite is also true—as frequency decreases, wavelength increases.

3 0
3 years ago
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6 0
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A ball droped from a building. How fast is it traveling after falling 3.55s
algol [13]

Answer:

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Explanation:

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4 0
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Answer:

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6 0
3 years ago
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