A point on the circumference of the paddle wheel travels the same linear speed as the water in the stream.
Use dimensional analysis:
11 revs / 1 min · 12π ft / 1 rev ⋅ 1 mile / 5,280 ft · 60 mins / 1 hr = 1.5π mph ~ 4.71 mph
G M.
asked 01/25/21To approximate the speed of a stream's current, a paddle wheel with a radius of 6 feet is lowered into the water.
If the stream causes the wheel to rotate at 11 rpm, what is the speed of stream in miles per hour? (1 mile= 5280 feet)
Round your answer to 2 decimal places
___ mph
A point on the circumference of the paddle wheel travels the same linear speed as the water in the stream.
Use dimensional analysis:
11 revs / 1 min · 12π ft / 1 rev ⋅ 1 mile / 5,280 ft · 60 mins / 1 hr = 1.5π mph ~ 4.71 mph
Get a free answer to a quick problem.
Most questions answered within 4 hours.
Choose an expert and meet online. No packages or subscriptions, pay only for the time you need.