Differences between revisions 3 and 4
Revision 3 as of 2009-05-07 08:18:09
Size: 451
Editor: PieterSmit
Comment:
Revision 4 as of 2009-05-07 08:38:53
Size: 1294
Editor: PieterSmit
Comment:
Deletions are marked like this. Additions are marked like this.
Line 6: Line 6:
 * If power is like the strength of a weightlifter, energy is like his endurance. Energy is a measure of how long we can sustain the output of power, or how much work we can do. Power is the rate at which we do the work
 * One common unit of energy is the kilowatt-hour (kWh). If we are using one kW of power, a kWh of energy will last one hour. If we use 10 kW of power, we will use up the kWh in just six minutes.
 {{{
  BTU is the amount of energy needed to raise the temperature of 1 pound of water 1 degree F
  1 horsepower is equivalent to 746 watts
  One BTU is equal to 1,055 joules, or 252 gram-calories or 0.252 food Calories.
  One watt is equal to 1 Newton-meter per second (Nm/s).
  
 }}}
 * Measure your power output by running up a flight of stairs. Power (W) = (height of stairs (m) / Time to climb (s) ) * weight (N)

Power generation by the human body

...


CategoryEcoFriendly

eco/humanpower (last edited 2013-09-14 19:24:24 by PieterSmit)