[1] (b) The hydrogencarbonate indicator solution changes colour when the pH changes. At
pH 8.4 it is red, at pH 7.6 it is yellow and at pH 9 it is purple.
Predict the colour of the hydrogencarbonate indicator solution in the bottle nearest the
lamp at the end of the investigation. Explain your answer.
colour prediction
explanation​

the energy generated by an individual's metabolism is calculated in met (metabolic equivalent of task). the met is the ratio of the work metabolic rate to the resting metabolic rate. one met is illustrated as 1 kcal per kilogram per hour, and is probably equal to the energy cost of sitting quietly.

1 met is equal to 1.162 watt per kg

1 kg is equal to 1000 grams

as the person weighs 80000 gm, that is, 80 kg.

therefore, 80*1.162 = 92.96

thus, the person expends 92.96 watts of power while at rest.