Question

The speed of light is 3 x 105 kilometers per second. What is that in standard form?

Answer 1

`v=3*10^(5) (km)/(s) =300 \ 000 (km)/(s)`

Answer 2

speed of light is 3 x
`10^(8)` meters per second.

Explanation:

Given : The speed of light is 3 x
`10^(5)` kilometers per second.

To find : What is that in standard form.

Solution : We have given 3 x
`10^(5)` kilometers per second.

First we convert it in to meter per sec.

We can write

3 x
`10^(5)` = 300000 kilometer per second .

We know that 1 km = 1000 meter.

Then 300000000 meter per second

Now, 3 x
`10^(8)` meter per second.

Therefore, speed of light is 3 x
`10^(8)` meters per second.