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(Solved): 17-18-19-20 please A weightlifter has a basal metabolic rate of 72.9W. As he is working out, his ...
A weightlifter has a basal metabolic rate of 72.9W. As he is working out, his metabolic rate increases by about 650W. Answer the following: 17) How many hours does it take him to work off a 450 Calorie bagel if he's working out? a) 5h b) 55h c) 0.72h d) 0.001h 18) Calculate the amount of mechanical work necessary to lift a 109kg barbell 1.90m. a) 5.9J b) 778J c) 2030J d) ?0.25J 19) He drops the barbell to the floor and lifts it repeatedly. How many times per minute must he repeat this process to do an amount of mechanical work equivalent to his metabolic rate increase of 650W during exercise? a) 19.2 b) 0.25 c) 101 d) 2.5 20) Two dozen apples is how many moles of apples? a) 0.45 b) 4.89×10?4 c) 4.0×10?23 d) 1.0×10?24