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    HW: What is energy used? What is wattage?

    Cutnell Physics 7th Ed pg 600 # 39 Homework Statement A camera flash has a capacitor. Capacitor has a rating of: 850uF The potential difference between the places is: 280V a) Determine Energy used to produce flash. b)If flash lasts 3.9E-9 S, what is the power or wattage of the...