7. A ceiling fan with 16-inch blades rotates at 45 rpm a) Find the angular speed

Question

7. A ceiling fan with 16-inch blades rotates at 45 rpm a) Find the angular speed of the fan in radians/minute b) Express the result in degrees per minute c) Find the linear speed of the tips of the blades in inches'minute 8. The wheels of a car have radius 11 inches and are rotating at 600 rpm. Find the speed of the car in 39.27 m:/h 9. The Greek mathematician Eratosthenes (276-195 B.C) measured the circumference of the earth from the following observations. He noticed that on a certain day the san shone directly down a deep well in Syrene (modern Aswan). At the same time in Alexandria, 500 miles north (on the same meridian), the ays of the sun shone at an angle of 7.2" to the zenith. Use this information and the figure to find the radias and the circumference of the earth. 500

Explanation / Answer

Nice work!

All looks good...

In problem 8, on the second step, you must write the unit as rad/min, not rev/min.

All else looks good.

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