Question

How much far is the Moon from Earth if it takes light 8.53 hours to travel there?

Answer 1

9.21x10¹² m

Step-by-step explanation:

In order to solve this problem we need to move the speed at which light moves. That value can be readily found on textbooks:

• c = 3x10⁸ m/s

Then we can use the formula for speed:

• Speed = distance / time

• Distance = Speed * time

Where in this case Speed is c, and the time is 8.53 hours.

Now we convert 8.53 hours into seconds:

• 8.53 hr *
  `(60min)/(1hr)*(60s)/(1min)` = 30708 s

Finally we calculate the distance:

• 3x10⁸ m/s * 30708 s = 9.21x10¹² m