Are the processes transforming one energy source to another (e.g. glucose to ATP) and the mechanisms by which ATP is used to power cellular reactions 100% efficient?

At rest, why is the body 0% efficient?

How does one calculate mechanical efficiency?

Why can the body's 'useful' power output be easily measured on a bicycle ergometer?

What value is used to estimate one's metabolism's total energy production?

Put these in order of increasing mechanical efficiency: human, steam train, petrol car, steam engine, electric train, diesel engine.

Under what conditions did you collect air breathed by the subject in this experiment?

What type of bag was used to collect the air from the subject?

The volumes of gas collected must have their values corrected for environmental conditions - such as?

In this lab, metabolic rate was calculated using a spreadsheet rather than by hand. Next, the metabolic rate (cal/hour) needed to be converted into useful work done - how is this calculated?

How was gross mechanical efficiency calculated once the metabolic rate and useful work done had been calculated?

Why is the net mechanical efficiency calculated as a final value, instead of using the initial gross mechanical efficiency calculated?