[填空题]
You buy a 75-W lightbulb in w*s3 5wggt(kgEurope, where electricity is delivered to homa;*7fthat3y-lc.mgp7 frq.s es at 240 V. If you use the lightbulb inms*hyflpq-. ;t gtacra3f7. 7 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 to power consumed.] as bright
