Question

3. The speed of light in air is 30 x 10 km/sec (approximately). How much distance wil
6. How many seconds are there in 1000 days? Write the answer in the standard for
7 Divide 13 31 x 1010 hy 1 21 y 1015 and write the
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Answer 1

Answer:

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Step-by-step explanation:

The speed of light in air isThe distance travelled by light in one yearis know as one light year. A student calculates one light year =

Solution :

We know, that one light year = speed of light<br>time (one year) <br><br><br> As per rule, when tow physical quantites are multiplied, the number of significant figures in <br> the result cannot be greater then the least number <br> of significant figures in any of the tw quantites.<br> We do not agree with the student. The product <br> is, therefore, rounded of to contain three <br> significant figures. We may wirte : <br> one light year