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Problem 1 Problem 2 Problem 3 Problem 4 Problem 5 Problem 6 Problem 7 Problem 8 Problem 9 Problem 10 Problem 11 Problem 12 Problem 13 Problem 14 Problem 15 Problem 16 Problem 17 Problem 18 Problem 19 Problem 20 Problem 21 Problem 22 Problem 23 Problem 24 Problem 25 Problem 26 Problem 27 Problem 28 Problem 29 Problem 30 Problem 31 Problem 32 Problem 33 Problem 34 Problem 35 Problem 36 Problem 37 Problem 38 Problem 39 Problem 40 Problem 41 Problem 42 Problem 43 Problem 44 Problem 45 Problem 46 Problem 47 Problem 48 Problem 49 Problem 50 Problem 51 Problem 52 Problem 53 Problem 54 Problem 55 Problem 56 Problem 57 Problem 58 Problem 59 Problem 60 Problem 61 Problem 62 Problem 63 Problem 64 Problem 65 Problem 66 Problem 67 Problem 68 Problem 69 Problem 70 Problem 71 Problem 72 Problem 73 Problem 74 Problem 75 Problem 76 Problem 77 Problem 78 Problem 79 Problem 80 Problem 81 Problem 82 Problem 83 Problem 84 Problem 85 Problem 86

Problem 11 Easy Difficulty

Plate tectonics. The earth's crust is broken up into a series of more-or-less rigid plates that slide around due to motion of material in the mantle below. Although the speeds of these plates vary somewhat, they are typically about 5 $\mathrm{cm} / \mathrm{yr.}$ . Assume that this rate remains constant over time. (a) If you and your neighbor live on opposite sides of a plate boundary at which one plate is moving northward at 5.0 $\mathrm{cm} / \mathrm{yr}$ with respect to the other plate, how far apart do your houses move in a century? (b) Los Angeles is presently 550 $\mathrm{km}$ south of San Francisco, but is on a plate moving northward relative to San Francisco. If the 5.0 $\mathrm{cm} / \mathrm{yr}$ velocity continues, how many years will it take before Los Angeles has moved up to San Francisco?

Answer

a) 5 $\mathrm{m}$
b) $11 \times 10^{6}$ yrs

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Video Transcript

stop it. We know that one century in stick weirdo 100 years on DH one kilometer is house and moved up, which is then equal to 10 to the five centimetre. Since one leader, this 100 centimeter. Not for a party. You know, the distance is sick, went, Oh, velocity times. Stein. And then there is no acceleration. So this is equal five centimetres a year. Times the number off my ears in one century. What isthe 100? Yeah, yeah, for the distances. I kind of sending me there. Five in runs and Judy now dying and sick. Waldo. Distance over velocity. As you can see from this, a question on foot a distance away. 5 50 times. 10 to the five cm. We have time. So we divide the velocity. And this is a quite a 1.1 line straight into the fire. Seven years.

We have video lessons for 97.51% of the questions in this textbook
Hugh D. Young

College Physics

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