chapt1 probl22

Physics: Principles with Applications

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: Solution: (a) Since there are 60 s/minute, and 60 minutes/hour, and 24 hr/day, and 365.25 day/year, the distance light travels in a year is 2.98 108 m/s 60.0s/min 60.0min/hr 24.0hr/dy 365.25dy/yr 1.00yr = 9.40 1015 m. (b) Now, 1.0 AU = 1.50 108 km, or 1.0iAU = 1.50 108 km 1.000 103 m/km = 1.50 1011 m. Thus, a light-year is 9.40 1015 m 1.0AU = 6.27 105 AU. 1.50 1011 m (c) Thus, light goes 6.27 105 AU/year. Converting this to AU/hr we get 6.27 105 AU/yr 1yr 1day = 7.15 AU/hr. 365.25 day 24hr ...
View Full Document

This document was uploaded on 01/31/2008.

Ask a homework question - tutors are online