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      Facts and Trivia - 

Power Equivalents
  • 1 watt = 1 joule/second
  • 1 horsepower = 745.7 watts
  • 1 Btu/minute = 17.58 watts
  • 1 watt = 1 kg·m²/s³
  • 1 horsepower = 550 ft·lbf/seconds
    		•
    Energy Equivalents
  • 1 joule = 1 watt-second
  • 1 calorie = 4.186 joules
  • 1 kilowatt-hour = 3,415 Btu
  • 1 Quad = 1015 Btu
  • 1 joule = 1 kg·m²/s²
    		• Energy is an "amount" and Power is a "rate" at which energy is moved or transformed
    The United States makes up only 3.9% of the world's population yet consumes 25.5% of its petroleum!Operating a "cooling" fan in a closed room heats up the room at a rate equal to the voltage times electrical current going into the fan. (120 volts x 2 amps = 240 watts of heat)Heat is energy held within a body and temperature is an indicator of the amount of heat. Things that feel cool in a warm room simply transfer heat quickly when touched.

    .
    An average 150 pound person:
  • Can produce about 200 watts of power for a short period.
  • Has body waste heat of about triple the power output or 600 watts.
  • Produces 350 watts of work and heat while walking briskly.
  • Generates 93 watts of heat while sleeping.
    		•  Climbing Mt. Sanitas (1,200 foot elevation gain)
  • Running up Mt. Sanitas in 30 minutes requires about 250 watts of power output and produces about 750 watts of body heat.
  • Total energy consumed to climb Mt. Sanitas in 30 minutes would be 500 watt-hours (1,000 watts x ½ hour).
  • 500 watt-hours is the energy derived from eating just over 3 granola bars or only 3/4 of a Big Mac.(1 watt-hour = 0.86 kilocalorie)

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    EnergySense, 2810 Olson Drive, Boulder, Colorado 80303
    303 444-0569, Answers@EnergySense.com