[填空题]
You buy a 75-W lightbulb in Europe, wheac+c4e zf,l, ares*lcfn6x 4 b8k rvtwuh::ft/+ electricity is delivered to homes at 240 V. If you use the lightbulb in the United States at 120 V (assume its resistance does not change), how bright will it be relative to 75-W 120-V bulbs? [Hint: assume roughly that brightness is proportional b :6v/hwt4 utf+nrxlf8k:s*c to power consumed.] as bright
