A light-year is the distance that light travels in one year. Find the number of miles in a light-year if light travels 1.86 × 105 miles/second. (Round to one decimal place, and assume that there are 365 days in a year.)
Multiply that 1.86*10^5 miles/sec number by the number of seconds in a year.
The number of seconds (in a year) is
24 x 60 x 60
160.7
To find the number of miles in a light-year, we need to calculate the distance that light travels in one year.
First, let's find the number of seconds in a year by multiplying the number of days in a year by the number of hours in a day (24) and the number of minutes in an hour (60), and the number of seconds in a minute (60).
365 days/year x 24 hours/day x 60 minutes/hour x 60 seconds/minute = 31,536,000 seconds/year
Next, we'll multiply the number of miles light travels in one second (1.86 x 10^5 miles/second) by the number of seconds in a year (31,536,000 seconds/year).
Distance traveled in one year in miles = 1.86 x 10^5 miles/second x 31,536,000 seconds/year = 5.86 x 10^12 miles/year
Therefore, there are approximately 5.9 x 10^12 miles in a light-year.
To find the number of miles in a light-year, we need to first find the distance that light travels in one year. Since light travels at a constant speed of 1.86 × 10^5 miles/second, we can calculate the distance using the formula:
Distance = speed × time
Given that there are 365 days in a year, we need to convert this into seconds. We know that there are 24 hours in a day, 60 minutes in an hour, and 60 seconds in a minute. So:
Seconds in a year = (365 days) × (24 hours/day) × (60 minutes/hour) × (60 seconds/minute)
Now we can calculate the distance traveled by light in one year:
Distance = (1.86 × 10^5 miles/second) × (Seconds in a year)
After calculating this value, we round it to one decimal place to get the number of miles in a light-year.