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Vinvika [58]
3 years ago
14

How much work is needed to stop a 1,110 kg car that is moving straight down the

Physics
1 answer:
schepotkina [342]3 years ago
3 0

Answer:

382.74 kJ.

Explanation:

The work that must be done to stop an 1100 kg car travelling at 59  km/h is  - 382.74 kJ.

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But Mass of solids does not depend upon the temperature because it is matter contained in the solids.

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What is the value of the angle of refraction of light from a crown glass slab when the angle of incidence is 50°? The slab has a
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The angle of refraction is 30.3^{\circ}

Explanation:

Refraction is a wave phenomenon that occurs when a light wave passes through the interface between two mediums. When this occurs, the speed and the direction of the light wave change.

We can find the final direction of the refracted light in this problem by applying Snell's law:

n_i sin \theta_i = n_r sin \theta_r

where

n_i, n_r are the index of refraction in the first and second medium, respectively

\theta_i, \theta_r are the angle of incidence and refraction, respectively

In this problem, we have:

n_i = 1.00 (the first medium is air, which has a refractive index of 1.00)

n_r = 1.52 (index of refraction of crown glass)

\theta=50^{\circ} is the angle of incidence

Solving for \theta_r, we find the angle of refraction

\theta_r = sin^{-1}(\frac{n_i sin \theta_i}{n_r})=sin^{-1}(\frac{(1.00)(sin 50^{\circ})}{1.52})=30.3^{\circ}

Learn more about refraction and other wave phenomena:

brainly.com/question/3183125

brainly.com/question/12370040

#LearnwithBrainly

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