COSMIC PERSPECTIVE FUND.(LL BK+CODE)
COSMIC PERSPECTIVE FUND.(LL BK+CODE)
3rd Edition
ISBN: 9780135720158
Author: Bennett
Publisher: PEARSON
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Chapter 13, Problem 21SEQ

Explain all answers clearly, with complete sentences and proper essay structure if needed. An asterisk (*) designates a quantitative problem, for which you should show all your work.

*21. Uniformity of the cosmic Microwave Background. The temperature of the cosmic microwave background differs by only a few parts in 100,000 across the sky. Compare this level of uniformity to that of the surface of a square table that is 1 meter on each side: How big would the largest bumps on that table be if its surface were smooth to 1 part in 100,000? Could you see bumps of that size on the table’s surface with your naked eyes?

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Cam mechanisms are used in many machines. For example, cams open and close the valves in your car engine to admit gasoline vapor to each cylinder and to allow the escape of exhaust. The principle is illustrated in the figure below, showing a follower rod (also called a pushrod) of mass m resting on a wedge of mass M. The sliding wedge duplicates the function of a rotating eccentric disk on a camshaft in your car. Assume that there is no friction between the wedge and the base, between the pushrod and the wedge, or between the rod and the guide through which it slides. When the wedge is pushed to the left by the force F, the rod moves upward and does something such as opening a valve. By varying the shape of the wedge, the motion of the follower rod could be made quite complex, but assume that the wedge makes a constant angle of 0 = 15.0°. Suppose you want the wedge and the rod to start from rest and move with constant acceleration, with the rod moving upward 1.00 mm in 8.00 ms. Take m…
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