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  • What is wrong with this statement?

    As we all know, it takes 1 calorie to heat 1 gram of water to 1 degree centigrade.

    For example, a dessert served and eaten at near 0 degrees C (32.2 deg. F) will in a short time be raised to the normal body temperature of 37 degrees C (98.6 deg. F). For each gram of dessert eaten, that process takes approximately 37 calories as stated above. The average dessert portion is 6 oz, or 168 grams. Therefore, by operation of thermo dynamic law, 6,216 calories(1 cal/gm/deg. x 37 deg. x 168 gms) are extracted from body fat as the dessert's temperature is normalized.

    Allowing for the 1,200 latent calories in the dessert, the net calorie loss is approximately 5,000 calories.

    2 AntwortenPhysicsvor 1 Jahrzehnt
  • Thin air here - but maybe not every day?

    I live in Denver which is at elevation 5280 ft.

    Sea level barometer normal is 29.92 " Hg (14.7 psi).

    Denver barometer normal is 24.76" Hg (12.16 psi).

    Internal combustion engines generate only 83% of the HP of an engine at sea level, and it takes several days for visitors to get acclimatized to the thinner air here if visiting from a lower elevation.

    Several days ago I was filling my gas tank, and at the pump next to me was an RV. The RV owner said he was having trouble with the thinner air here, was short of breath, and wondered how long it took to get used to the altitude.

    Out of curiosity, when I got home, I checked the barometric pressure via Weather Underground and it listed it at 30.11 " Hg (better than sea level normal), which we get quite often.

    So my question is, why should the RV owner been short of breath?Wouldn't air at that Pressure have the same amount of O2 as at sea level?

    2 AntwortenEngineeringvor 1 Jahrzehnt
  • Thin air here - but maybe not every day?

    I live in Denver which is at elevation 5280 ft.

    Sea level barometer normal is 29.92 " Hg (14.7 psi).

    Denver barometer normal is 24.76" Hg (12.16 psi).

    Internal combustion engines operate at only 83% efficiency of an engine at sea level, and it takes several days for visitors to get acclimatized to the thinner air here if visiting from a lower elevation.

    Several days ago I was filling my gas tank, and at the pump next to me was an RV. The RV owner said he was having trouble with the thinner air here, was short of breath, and wondered how long it took to get used to the altitude.

    Out of curiosity, when I got home, I checked the barometric pressure via Weather Underground and it listed it at 30.11 " Hg (better than sea level normal), which we get quite often.

    So my question is, why should the RV owner been short of breath?

    With the higher barometric pressure shouldn't the oxygen quantity of the air been at least equal to, if not better than at sea level?

    3 AntwortenWeathervor 1 Jahrzehnt
  • Show mathematically how increasing the carbon dioxide content of air contributes to Global Warming?

    Show how increasing the carbon dioxide content of air contributes to Global Warming?

    If the average standard composition of air worldwide is as follows (in parts per million) how can adding another 30% of carbon dioxide warm the atmosphere??? Since there is so little of it to begin with???

    Nitrogen 780, 805 parts per million;

    Oxygen 209, 450;

    Argon 9, 340;

    Carbon Dioxide 380;

    Neon 18.2;

    Helium 5.24;

    Krypton 1.14;

    Hydrogen 0.50;

    Xenon 0.087;

    3 AntwortenEnvironmentvor 1 Jahrzehnt
  • Explain how increasing the carbon dioxide content of air contributes to Global Warming?

    If the average standard composition of air worldwide is as follows (in parts per million) how can adding another 30% of carbon dioxide warm the atmosphere??? Since there is so little of it to begin with???

    Nitrogen 780, 805 parts per million;

    Oxygen 209, 450;

    Argon 9, 340;

    Carbon Dioxide 380;

    Neon 18.2;

    Helium 5.24;

    Krypton 1.14;

    Hydrogen 0.50;

    Xenon 0.087;

    '

    3 AntwortenEnvironmentvor 1 Jahrzehnt