The radius of the earth's very nearly circular orbit around the sun is 1.5 x 10^11 m. find the magnitude of the earth's velocity as it travels around the sun. assume a year of 365 days. find the magnitude of the earth's angular velocity as it travels around the sun. assume a year of 365 days. find the magnitude of the earth's centripetal acceleration as it travels around the sun. assume a year of 365 days.

In 1 year, 365 days, each day 24 hours, each hour 60 minutes and each minute 60 seconds.

OR

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As the radius of the earth's very nearly circular orbit around the sun is 1.5 x 10^11 m.

Therefore, the magnitude of the earth's velocity

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The magnitude of the earth's angular velocity is

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The magnitude of the earth's centripetal acceleration is

i think its c if i'm wrong

speed of light in vacuum is 300,000 km/s

speed of light in other mediums is given by the expression v = c/n, where c is the speed of light in vacuum and n is the refractive index of medium.

for the first medium v = 200,000 km/s

  so, refractive index of medium = 300000/200000 = 1.5

    1.5 refractive index is usually for glass. so first medium is glass.

for the second medium v = 250,00 km/s

so, refractive index of medium = 300000/250000 = 1.2

    1.2 refractive index is usually for water. so second medium is water.

for the third medium v = 0 km/s

so, refractive index of medium = 300000/0 = ∞

    ∞ refractive index is usually for opaque mediums. so third medium is opaque medium.