Calculate the number of miles in a light-year, using 1.86 105 mi/s as the speed of light.

Answer 1

To calculate the number of miles in a light-year, we first need to find the number of seconds in a year.

There are 60 seconds in a minute, 60 minutes in an hour, 24 hours in a day, and 365 days in a year.

So, the number of seconds in a year is:
60 seconds/minute * 60 minutes/hour * 24 hours/day * 365 days/year = 31,536,000 seconds/year

Now we can calculate the number of miles in a light-year using the speed of light (1.86 * 10^5 mi/s) and the number of seconds in a year:

Number of miles in a light-year = Speed of light * Number of seconds in a year
Number of miles in a light-year = 1.86 * 10^5 mi/s * 31,536,000 s/year
Number of miles in a light-year = 5.87 * 10^12 miles

Therefore, there are approximately 5.87 trillion miles in a light-year.