697_Physics ProblemsTechnical Physics

# 697_Physics ProblemsTechnical Physics - Chapter 24 P24.33...

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Chapter 24 37 P24.33 Consider two balloons of diameter 0.2 m, each with mass 1 g, hanging apart with a 0.05 m separation on the ends of strings making angles of 10° with the vertical. (a) F T mg T mg y = °− = = ° cos cos 10 0 10 F T F F T x e e = °− = = ° sin sin 10 0 10 , so F mg mg F e e = ° F H G I K J °= °= ° × cos sin tan . . tan 10 10 10 0 001 9 8 10 2 10 3 3 kg m s N ~10 N or 1 mN 2 b g e j FIG. P24.33 (b) F k q r e e = 2 2 2 10 8 99 10 0 25 1 2 10 10 3 9 2 2 7 7 × × × N N m C m C ~ C or 100 nC 2 2 . . . e j a f q q (c) E k q r e = × × × 2 9 7 2 4 8 99 10 1 2 10 0 25 1 7 10 10 . . . . ~ N m C C m N C kN C 2 2 e je j a f (d) Φ E q = × × = × 0 7 12 4 1 2 10 1 4 10 10 . . ~ C 8.85 10 C N m N m
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