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3 years ago

Select the correct answer.

Physics

1 answer:

Sonbull [250]3 years ago

4 0

Answer: 65°

Explanation:

According to Snell's law, which states that ratio of the sine of the angle of refraction and the sine of the angle of incidence is always constant and equivalent to the ratio of phase velocities of the two mediums it is passing through.

nr / ni = sin I/ sin r

r = 38°

I = ?

ni = 1

nr = 1.47

1.47 / 1 = sin i / sin38

Sin I = 1.47sin38

Sin I = 0.9050

I = sin-¹ 0.9050

I = 64.826°

I = 65°

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<h2>Its velocity when it crosses the finish line is 117.65 m/s</h2>

Explanation:

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3 years ago

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<h3>How to determine the initial force </h3>

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<h3>How to determine the new force </h3>

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Learn more about gravitational force:

brainly.com/question/21500344

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Solution is given in the attachments,below.

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3 years ago

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marusya05 [52]

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