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Hello students.
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So, in this video, we have given a mass of a star as 2 x 10 to the power 30 kg.
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So, let us first convert this to grams by multiplying it with 1000 grams that is equals to 2 x 10 to the power 33 grams.
00:16
Now, we have the diameter of the star given as 1 .4 x 10 to the power 6 km.
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So, to calculate the volume, we need the radius which is equals to diameter by 2 that is equals to 1 .4 x 10 to the power 6 by 2 km that is equals to 0 .7 x 10 to the power 6 km.
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Now, to convert this to centimeter, we have to multiply.
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We know that 1 km is equals to 10 to the power 5 cm.
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So, that means 10 to the power 6 x 10 to the power 5 cm that is equals to 0 .7 x 10 to the power 11 cm.
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Now, that we have the radius, let us calculate the volume using the formula v is equals to 4 x 3 pi r cube as the star is a sphere that is equals to 4 x 3 x 3 .14 x 0 .7 x 10 to the power 11 whole cube centimeter cube...