How is the time interval of 3 days, 11 hours, 27 minutes, and 14.2 seconds expressed in SI units?

To express the time interval of 3 days, 11 hours, 27 minutes, and 14.2 seconds in SI units, one must convert each component of the time into seconds, as the SI unit of time is the second (s).

1. Convert the days to seconds: There are 24 hours in a day, so:
   • 3 days = 3 × 24 hours = 72 hours

• 72 hours in seconds = 72 × 3600 seconds = 259200 seconds

2. Convert the hours to seconds:

   • 11 hours = 11 × 3600 seconds = 39600 seconds

3. Convert the minutes to seconds:

   • 27 minutes = 27 × 60 seconds = 1620 seconds

4. The seconds component remains the same:

   • 14.2 seconds = 14.2 seconds

Now, sum all these converted values to get the total time in seconds:

• Total seconds = 259200 seconds (from days) + 39600 seconds (from hours) + 1620 seconds (from minutes) + 14.2 seconds
• Total seconds =