Chapter 7, Problem 51PCE

BIO Human-Powered Flight Human-powered aircraft require a pilot to pedal, as in a bicycle, and produce a sustained power output of about 0.30 hp. The Gossamer Albatross flew across the English Channel on June 12,10979, in 2 h 49 min. (a) How much energy did the pilot expend during the flight? (b) What is the minimum number of Snickers bars (280 Cal per bar) the pilot would have to consume to be “fueled up” for the flight? [Note: The nutritional calorie, 1 Cal. is equivalent to 1000 calories (1000 cal) as defined in physics. In addition, the conversion factor between calories and joules is as follows: 1 Cal = 1000 cal = 1 kcal = 4184 J. ]