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IrinaK [193]
3 years ago
14

A force does 210 J of work when it acts on a moving object and its direction is in the same direction as the object’s displaceme

nt. How much work does this force do when the angle between it and the object’s displacement is 56°
Physics
1 answer:
MariettaO [177]3 years ago
5 0

Answer:

When the angle is 56° the work done is 117.43 J

Explanation:

Work = F . s = Fscosθ

We have

   W1 = 210 J, θ = 0°

Substituting

      210 = F x s x cos 0 = Fs

Now we have to find W2 when angle θ = 56°

Substituting

      W2 = F x s x cos 56 = 210 cos56= 117.43 J

When the angle is 56° the work done is 117.43 J

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Answer:

a) The minimum thickness of the oil slick at the spot is 313 nm

b) the minimum thickness be now will be 125 nm

Explanation:  

Given the data in the question;

a) The index of refraction of the oil is 1.20. What is the minimum thickness of the oil slick at that spot?

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we substitute

t_{min = 750 / 2(1.20)

t_{min = 750 / 2.4

t_{min = 312.5 ≈ 313 nm

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Suppose the oil had an index of refraction of 1.50. What would the minimum thickness be now?

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t_{min = λ/4n

given that; wavelength λ = 750 nm and  index of refraction of the oil n = 1.50

we substitute

t_{min = 750 / 4(1.50)

t_{min = 750 / 6

t_{min = 125 nm

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How is color related to wavelength?
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A wildlife researcher is tracking a flock of geese. The geese fly 4.0 km due west, then turn toward the north by 40º and fly ano
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Wildlife researcher starts from a and then reaches b, he turns towards north 40 degree to move towards c.

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