Recent content by Lupin

  1. Lupin

    Using Destructive Interference to Treat Tinnitus

    I really like this question. You might be on to something. I have a Garmin Forerunner 265s with a heart rate monitor strap. One of the many functions it monitors is "Stress." That value is calculated from Heart rate, HRV (Heart Rate Variability) and probably other inputs. The time...
  2. Lupin

    I How much energy (in Joules) is stored in a standard 12g CO2 cartridge?

    My goodness! Thank you for boiling the math down to a number I can understand. W = 3273 Joules?! I am shocked that it is so high. The Daisy BB gun must be so inefficient! My simple test of shooting it until it runs out of power (about 100 shots) yielded a total kinetic energy work of...
  3. Lupin

    I How much energy (in Joules) is stored in a standard 12g CO2 cartridge?

    I didn't realize this was going to be so complicated. I'm learning a lot. I figured there would be an easy calculation that was based upon knowing the mass of the CO2: 12g in liquid state; the temperature: assumed to be constant at room temp 24C; and atmospheric pressure: 1 bar. Then...
  4. Lupin

    I How much energy (in Joules) is stored in a standard 12g CO2 cartridge?

    I am still struggling with this. For the purpose of the discussion I would ignore the small amount of CO2 left in the 12 gram CO2 powerlet cartridge. (I'm sorry about the English units but that is all I have.) I know I can get about 50 shots out of my Daisy BB gun where a 5.5 grain bb goes...
  5. Lupin

    I How much energy (in Joules) is stored in a standard 12g CO2 cartridge?

    A standard 12 gram cartridge contains both liquid and gaseous CO2 at 850psi. Assuming we are venting to atmosphere at sea level, how much energy can be extracted from the cartridge? We know it will expand to 12 grams * 22.4 liters/ 1 mole (44grams) = 6.1 liters. But how much energy did...
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