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Norma-Jean [14]
3 years ago
5

A flashlight beam strikes the surface of a pane of glass (n=1.56) at a 71° angle to the normal. What is the angle of refraction?

Express your answer using two significant figures
Physics
1 answer:
Aleks04 [339]3 years ago
3 0

Answer:

The angle of refraction is 37°.

Explanation:

let n1 be the refractive index of glass and n2 = 1.0 be the refraction index of air, θ be the angle of incidence , ∅ be the angle of refraction.

then, according to Snell's law:

n1×sin(∅) = n2×sin(θ)

    sin(∅) = n2×sin(θ)/n1

              = (1.0)(sin(71°))/(1.56)

              = 0.606101651

          ∅ = 37°

Therefore, the angle of refraction is 37°.

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In a large restaurant an average 60% customers ask for water with their meal. A random sample of 10 customers is selected. Find
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Answer:

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Explanation:

From the question we are told that:

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a)

Generally the probability that exactly 6 ask for water is mathematically given by

P(x)6=10C_6 (0..6)^6(0.4)^{10-6}

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b)

Generally the probability that  less than 9 ask for water with meal  is mathematically given by

p(xg)

p(x

p(x

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c)

Generally the probability that  at least 3 ask for water with meal  is mathematically given by

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p(x\geq3)=1-[p(0)+p(1)+p(2)]

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d)

Generally the mean and standard deviation of sample size is mathematically given by

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Standard deviation

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