Difference between revisions of "Giancoli Physics (5th ed) Chapter 19"

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Revision as of 12:24, 5 November 2007

Return to Solutions

Contents

Problems

1. Question

560 Ω
35 Ω

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2. Question

360 Ω
8.9 Ω

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3. Question

30 Ω
50 Ω
80 Ω
19 Ω

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4. Question

2.80 kΩ
261 Ω

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5. A tiger leaps horizontally form a 7.5-m-high rock with a speed of 4.5 m/s. How far from the base of the rock will she land?

Horizontal Vertical
s =Â
u = 4.5 m/s
v = "
a = 0
t = 		s = -7.5 m
u = 0 (Purely horizontal)
v = ? (don't care!)
a = -9.8 m/s/s
t = ?

UseÂ

s = ut 1/2at2
-7.5 = 1/2(-9.8)t2
t =Â 1.2372 s

Use:

vav = Ds/Dt, as we now know t

4.5 m/s = s/(1.2372s)
s = 5.567 m = 5.6m



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6. Question

720 Ω
80 Ω
.360 Ω
160 Ω

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7. Question

4.6 kΩ

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8. Question

13.8 V
34 Ω
5.5 W

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9. Question

450 Ω
2.6%

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