use dimensional analysis to change:
a. 20.8 tons to pounds
b.504 minutes to weeks
c. 2500 centimeters per second to kilometers per hour
2007-09-05 05:58:14 · 5 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics
a)
(20.8 ton)(2000 pound / 1 ton) = 41600 pounds
b)
(504 min)(1 hr / 60 min)(1 day / 24 hr)(1 wk / 7 day)
= 0.05 weeks
c)
(2500 cm / sec)(3600 sec / hr)(1 km / 100000 cm)
= 90 km / hr
2007-09-05 06:07:29 · answer #1 · answered by Mathematica 7 · 1⤊ 0⤋
Looking at Wikipedia, I gather that using dimensionless conversion factors is but one of the procedures involved in complex dimensional analysis. Never having used the term dimensional analysis in school, I will simply convert to pounds, weeks, and hours and see if those are the answers you wanted:
a. M = mass
1 ton = 2000 lbs, 20.8*2000 = 41.6*1000 = 41,600 lbs
b. T = time
1 week = 7*24*60 min = 10080 min,
504/10080 = 0.05 weeks
c. V = L/T. 2500 cm = 25 m = 25/1000 km = 0.025 km
1 sec = 1/3600 hr
3600*0.025 = 90 kph
2007-09-05 13:57:21 · answer #2 · answered by Anonymous · 0⤊ 0⤋
a. 1 ton=2200 pounds so 20.8 tons = 45760 pounds
b. 1 week = 7 days =7*24 hours= 7*24*60= 10080 minutes
so 504 minutes = 0.05 weeks
c. 1 cm/s = 0.036 km/hour so 2500 cm/s = 90 km/h
2007-09-05 13:07:38 · answer #3 · answered by WattyIrma 3 · 0⤊ 1⤋
20.8 tons = 41,600 lbs
504 minutes 0.05 weeks
2500 cm per sec = 900 km per hour
2007-09-05 13:12:32 · answer #4 · answered by Will 4 · 0⤊ 1⤋
20.8 tons *2000pounds/ton = 41,600 pounds
504 min/60min/hour/ 24 hour/day/7days/week = .05 weeks
2500 cm/sec/100000cm/km*3600 sec/hour = 90km/hour
2007-09-05 13:13:56 · answer #5 · answered by ironduke8159 7 · 0⤊ 0⤋