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2. Suppose that you use a 20-W fluorescent light bulb for 1.25 h. (Assume two significant digits for the specified power of the bulb.) a)

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2. Suppose that you use a 20-W fluorescent light bulb for 1.25 h. (Assume two significant digits for the specified power of the bulb.) a) How much electrical energy is used? Express answer in joules. b) How much of this energy (in joules) produces light? (Use Table 7.3) Approximate Efficiencies of Energy Conversions Type of Useful Device Type of Energy In Energy Out Efficiency

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