Marion rides her racing bicycle at a speed of 8 m/s. the bicyle wheels have a radius of 34 cm.
a. what is the angular speed of the wheels?
b. how many times does each wheel go around during a 10 minute ride?

What is the length x of the side of the triangle below? (hint: use the cosine function)

Explain earth's motion, using the terms "precession" and "rotation" in your answer.

On a mild saturday morning while people are working inside, the furnace keeps the temperature inside the building at 23degreesc. at noon the furnace is turned off, and the people go home. the temperature outside is a constant 16degreesc for the rest of the afternoon. if the time constant for the building is 3 hr, when will the temperature inside the building reach 18degreesc? if some windows are left open and the time constant drops to 2 hr, when will the temperature inside reach 18degreesc?