Determine the number of miles in the distance from the earth to a star that is 7.00 light-years away, assuming that the speed of light is 1.86x10^5 mi/sec and 1 year is 365 days?
2007-06-25 01:24:46 · 4 answers · asked by ckorski 1 in Science & Mathematics ➔ Mathematics
find the distance in one day which has 60*60*24 seconds and multiply it with 365 days which will give the distance in one year. For seven years multiply the answer by 7
1.86x10^5 mi/sec * 60*60*24*365*7
= 41059872000000 miles :)
2007-06-25 01:35:29 · answer #1 · answered by mishi 1 · 0⤊ 0⤋
basic formula
distance = speed * time
d = v * t
where,
speed v = 1.86* 10^5 mi/sec
time t = 7.00 light years
1 yr = 365 days
1 day = 24 hr
1 hr = 60 min
1 min = 60 sec
so, 1 yr = 365 * 24 * 60 * 60 = 31536000 sec
t = 7.00 light years = 7.00 light * (31536000 sec)
= 220752000 sec
d = v * t
= (1.86x10^5 mi/sec ) * (220752000 sec)
= 410598720 * 10^5 mi
= 41,059,872,000, 000 miles
2007-06-25 16:58:30 · answer #2 · answered by buoisang 4 · 0⤊ 0⤋
(1.86x10^5 mi/s * 3600 s/hr * 24 hr/dy * 365 dy/yr)/ly * 7 ly
= 5.87 * 10^12 miles (to 3 sig figs)
2007-06-25 08:30:52 · answer #3 · answered by gebobs 6 · 0⤊ 0⤋
ok look
first one year has 365 day,then in one year the distance is=365x1.86x10^5x24x60x60=586596000000 miles.therefore the total disatances is
7x586596000000=41059872x10^5 miles
hope i could help every time
2007-06-25 08:45:45 · answer #4 · answered by Abdullah 2 · 1⤊ 0⤋