With the level of childhood obesity reaching epidemic proportions in the United States, on...

With the level of childhood obesity reaching epidemic proportions in the United States, one inventor decided to create a device to make children exercise to generate the electrical energy required for them to watch television. Attaching a small electric generator to a stationary exercise bike, the “Cyclevision ” (Fig. P19.90) is able to generate enough electrical energy to supply a typical television. Assuming the generator is 80% efficient at converting the mechanical energy of the exercise bike to electrical energy, estimate the number of calories burned while watching 4 h of television (the average daily amount for a child in the United States).

Figure P19.90