A unit for measuring astronomical distances is the light year, which is the distance light travels in one year. The speed of light is 3 x 10^8 m/s. Calculate the approximate number of:
a) metres in one light year
b) kilometres in one light year.
2007-03-28 13:36:21 · 3 answers · asked by jay gal 3 in Science & Mathematics ➔ Mathematics
maybe u would want to place this question under physics.
speed of light : 3 x 10^8 m/s
so, in 3600 s or 1 h, it travels 10800 x 10^8 m
so, in 24 h or a day, it travels 259200 x 10^8 m
so, in 365 days or a yr, it travels 94608000 x10^8 m
so one light year = 9.46 x 10^15 m
= 0.00946 x 10^15 km
= 9.46 x 10^12 km
2007-03-28 13:47:37 · answer #1 · answered by Anonymous · 1⤊ 0⤋
Convert 365 days into seconds, and multiply this times the speed of light.
Divide by 1000 to get meters.
2007-03-28 20:46:24 · answer #2 · answered by Anonymous · 0⤊ 2⤋
60 sec/min. * 60 min./Hr. * 24 Hr./day * 365 day/year * 3*10^8 m/sec
= 9.22752*10^15 meters
/1000
= 9.22752*10^12 kilometers
2007-03-28 20:49:18 · answer #3 · answered by dylan k 3 · 1⤊ 1⤋