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Mathematics 18 Online
OpenStudy (anonymous):

A speed of 60 mph is equal to 88 per second. if sound travels at a speed of 1,100 ft per sec what is the speed of sound in miles

OpenStudy (anonymous):

is that 88 ft / sec ?

OpenStudy (anonymous):

yes

OpenStudy (anonymous):

do dimensional analysis.

OpenStudy (anonymous):

(1100 ft/s)(60s/hr)(1 mile/5280 ft)... cross out the units, answer should come out : 125 mph

OpenStudy (anonymous):

nvm that can't be right hold on though.

OpenStudy (anonymous):

found it. 3600 s in an hour not 60. duh.

OpenStudy (anonymous):

(1100 ft/s)(3600s/hr)(1 mile/5280 ft)=750 mph

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