|Heat Balance in the Human Body||
Keywords: calories, energy, energy use, evaporation, metabolic rate, power, sweat, thermal radiation, thinking
How much energy does our body use? How do we keep cool when it is really hot out? Can we justify eating more when studying?
Treating the human body as a thermodynamic system, with food energy going in and heat flow due to radiation, convection, evaporation and conduction, we can see how we can maintain a constant core temperature in a huge variety of environmental conditions.Read More...
|6 years 36 weeks ago|
|Cycling and Showering||
Keywords: cycling, energy use, heat capacity, showering
Are cycle commuters, who take an extra shower, doing more damage to the environment than those who commute by car?
A recent letter to the Vancouver Sun claimed that commuting by bicycle was worse for the environment than commuting by car. The reason given was that if a cycle-commuter takes an extra shower at work (because cycling makes you sweaty), that burns the energy equivalent of a litre of gasoline, which is more than a car would burn on an average commute. Fact or rubbish?Read More...
|6 years 49 weeks ago|