Recent content by zaguar

  1. Z

    Is Some of the Platonic Mathematical World Inaccessible to Us?

    If you have studied Cantor's diagonalisation argument, then I believe you will enjoy the middle section where he uses it to derive Godel's incompleteness principle.
  2. Z

    What is causing the discrepancy in the bullet momentum problem?

    Isn't muzzle velocity the velocity of the bullet relative to the gun? Thats how our teacher described it.
  3. Z

    When doing calculations, should pressure be in atm or Pa?

    Doesn't matter AFAIK as long as you adjust the constants for example R in PV=nRT.
  4. Z

    How Much Force Must a Fireman Exert to Hold a Steadily Ejecting Hose?

    Isn't that what I did? Isn't the flow rate always going at 12L/s and the velocity changing, so that there is always 12 litres of water going through the pipe per second, but the speed is different in different parts of the pipe? So the water is traveling at 0.33m/s in the hose, and exiting...
  5. Z

    How Much Force Must a Fireman Exert to Hold a Steadily Ejecting Hose?

    Sorry, but I don't understand what you're getting at. What was wrong with the original approach?
  6. Z

    How Much Force Must a Fireman Exert to Hold a Steadily Ejecting Hose?

    The question states: A firemans hose has a nozzle of area 5cm^2 and the hose has a cross sectional area of 360cm^2. The hose ejects water at 25m/s and at a rate of 12L/s What is the force that the fireman must exert to keep the hose steady? My attempt: What I have done so far is to...
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