The human body is about 25%% efficient at converting food energy into mechanical output. The remaining...
The human body is about 25%% efficient at converting food energy into mechanical output. The remaining 75%% are lost to heat or waste products. If you spend 1.01 MJ of "useable" energy how many food calories (i.e. kcal) do you burn in total?
Homework Answers
Energy consumed in the form of food (energy from burnt food) =
(in
Joules)
Of this energy, 
is converted
into usable form.
Hence 
Hence Energy consumed in the form of food 
Each food calorie is equal to 4184 J
Energy consumed in the form of food 
Add Answer to:
The human body is about 25%% efficient at converting food energy
into mechanical output. The remaining...
A. Food Energy. Energy is stored in food as the potential energy of the electrical bonds...
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Thermal question A 60-kg hiker plans to climb Mt Kosciuszko (2228 m) starting from Thredbo (1365m). Assume that she is 25% efficient at converting chemical energy from food into mechanical work,...
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A 60-kg hiker plans to climb Mt Kosciuszko (2228 m) starting from Thredbo (1365m). Assume that she is 25% efficient at converting chemical energy from food into mechanical work, and that essentially all the work goes into the vertical climb. (a) (3 marks) With reference to the data above, how many servings of Nutrigrain should she eat to provide enough energy for the climb? (b) (6 marks) Climbing a mountain warms you up, and makes you sweat one...
Each pound of fat contains 3500 food calories. When the body metabolizes food, 80.5% of this...
Each pound of fat contains 3500 food calories. When the body
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The human body converts internal chemical energy into work and heat at rates of 60 to 125 W (called the basal metabolic rate). This energy comes from food and is usually measured in kilocalories [1 kcal = 4.186 kJ]. (Note that the nutritional `Calorie' listed on packaged food actually equals 1 kilocalorie). How many kilocalories of food energy does a person with a metoblic rate of 109.0 W require per day? (Assume 100 percent efficiency.)
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38. BIO The rate at which a resting person converts food energy is called one's basal metabolic rate (BMR). Assume that the resulting internal energy leaves a person's body by radiation and convection of dry air. When you jog, most of the food energy you burn above your BMR becomes internal energy that would raise your body temperature if it were not eliminated. Assume that evaporation of perspiration is the mechanism for eliminating this energy. Suppose a person is jogging...
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When you jog, most of the food energy you burn above your basal metabolic rate (BMR)...
When you jog, most of the food energy you burn above your basal metabolic rate (BMR) ends up as internal energy that would raise your body temperature if it were not eliminated. The evaporation of perspiration is the primary mechanism for eliminating this energy. Determine the amount of water you lose to evaporation when running for 46 minutes at a rate that uses 400 kcal/h above your BMR. (That amount is often considered to be the "maximum fat-burning" energy output....
Thermal question
A 60-kg hiker plans to climb Mt Kosciuszko (2228 m) starting from Thredbo (1365m). Assume that she is 25% efficient at converting chemical energy from food into mechanical work, and that essentially all the work goes into the vertical climb. (a) (3 marks) With reference to the data above, how many servings of Nutrigrain should she eat to provide enough energy for the climb? (b) (6 marks) Climbing a mountain warms you up, and makes you sweat one...
Each pound of fat contains 3500 food calories. When the body
metabolizes food, 80.5% of this energy goes to heat. Suppose you
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metabolic power for a typical person.
Part A) For how many hours must you run to burn up 1 lb of
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Part B) If you followed your planned exercise program, how much
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