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World class speed skaters can skate a 3,000-m course in about 4 minutes.what is their average speed for this course? a. 12.5 m/sb. 1.33 m/sc. 1.25 m/sd. 13.3 m/s
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If a toaster uses 2000 J of electrical energy and produces 1000 J of thermal energy. What is its eff...
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