Question

light travels approximately 300,000,000 metres each second. A light year is the total distance travelled by light in one year. Assuming there are 365 days in a year, determine a light year, expressing your answer in standard form and with the correct unit.​

Answer 1

Answer:

109500000000

Step-by-step explanation:

Answer 2

Answer: 9.45 x 10^15 m

Step-by-step explanation:

The speed of light = 300,000,000 m/s (3·00 × 10^8m/s).

Length of Earth year = 365 days

= 365 × 24 × 60 × 60 seconds = 3·15 × 10^7seconds

Now speed = distance / time ...

so ... distance = speed × time

So: 1 light year = 3·00 × 10^8 × 3·15 × 10^7

1 light year = 9·45 × 10^15 m

That's nearly 9 1/2 million, million kilometres!