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3 years ago

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A boat having stones floats in water. If stones are unloaded in water, what will happen to the level of water?

1 answer:

Pani-rosa [81]3 years ago

5 0

Explanation:

If the stones are unloaded from the boat, the weight of the boat will decrease. Therefore, the volume of the water displaced by the boat will also decrease. Due to this, the volume of the boat immersed in the water decreases. Hence, the level of the water around the boat will decrease.

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Which type of forces creates contact between surfaces?

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Answer:

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Answer:

There will be a phase change at the first interface and no phase change at the second interface:

If the film is 1/4 wavelength thick this restriction will hold

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"D" is correct

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3 years ago

A ray is incident on a film of thickness t and the index of refraction n=1.6 at an angle θ = 35 degrees. Find the angle of refra

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Answer

Given,

refractive index of film, n = 1.6

refractive index of air, n' = 1

angle of incidence, i = 35°

angle of refraction, r = ?

Using Snell's law

n' sin i = n sin r

1 x sin 35° = 1.6 x sin r

r = 21°

Angle of refraction is equal to 21°.

Now,

distance at which refractive angle comes out

d = 2.5 mm

α be the angle with horizontal surface and incident ray.

α = 90°-21° = 69°

t be the thickness of the film.

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An enconomy car has a mass of 800 kg. What is the weight of the car?

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Answer:

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Answer:

$t=1.5\times 10^{-4}\ s$

Explanation:

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distance of data transfer, $s=10000\ km=10^4\ m$

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$t'=\frac{s}{v}$

$t'=\frac{10^4}{2\times 10^8}$

$t'=5\times 10^{-5}\ s$

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$t=3\times t'$

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3 years ago