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1. You rub a balloon on your sweater, and give it a charge of -100 nC...

1. You rub a balloon on your sweater, and give it a charge of -100 nC (nanocoulombs). About how many extra electrons did you put onto the balloon?

2. My guitar strings are 65cm long. Which of these is NOT a possible wavelength for standing waves on these strings? (A. 6.5cm B. 32.5cm C. 65cm D.1.3m E. 1.95m)

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