Comments on: Why Flu Spreads, Thrives in Winter http://www.missfidget.com/2009/02/19/flus-thrives-in-winter/ goodness it's good to see you again Tue, 05 Apr 2011 01:10:04 +0000 hourly 1 http://wordpress.org/?v=3.2.1 By: wgmontgomery http://www.missfidget.com/2009/02/19/flus-thrives-in-winter/comment-page-1/#comment-1149 wgmontgomery Sun, 22 Feb 2009 15:28:33 +0000 http://www.missfidget.com/?p=1507#comment-1149 If I used my free time for the power of good I might actually become Spider Man. That would be cool...ME, a Superhero! "Look out! Here comes the Spider Man." Getting caught in my web means real trouble for the bad gals! Perhaps the Riddler is more fitting...very hard to say. If I used my free time for the power of good I might actually become Spider Man. That would be cool…ME, a Superhero! “Look out! Here comes the Spider Man.” Getting caught in my web means real trouble for the bad gals! Perhaps the Riddler is more fitting…very hard to say.

]]> By: admin http://www.missfidget.com/2009/02/19/flus-thrives-in-winter/comment-page-1/#comment-1148 admin Sat, 21 Feb 2009 18:07:03 +0000 http://www.missfidget.com/?p=1507#comment-1148 wow. now imagine if you used your free time for the power of good. wow. now imagine if you used your free time for the power of good.

]]> By: wgmontgomery http://www.missfidget.com/2009/02/19/flus-thrives-in-winter/comment-page-1/#comment-1147 wgmontgomery Fri, 20 Feb 2009 21:49:48 +0000 http://www.missfidget.com/?p=1507#comment-1147 Free time? Me? Here's few more in case anyone has plans to do some tech diving: PSIG = Pounds per Square Inch (Gauge) PSIA = Pounds per Square Inch (Absolute) ATM = Atmospheres ATA = Atmospheres (Absolute) FSW = Feet of Sea Water FSWA = Feet of Sea Water (Absolute) FFW = Feet of Fresh Water FFWA = Feet of Fresh Water (Absolute) “T” formula Partial Pressure Total Pressure % Gas Partial Pressure = Total Pressure X % Gas % Gas = Partial Pressure / Total Pressure Total Pressure = Partial Pressure / % Gas Calculating PO2: PO2 = Depth in atmospheres absolute (ATA) X percentage O2 PO2 = ((d+33)/33)XFO2 or PO2 = ((d/33)+1) X FO2 Calculating MOD: MOD = ((Maximum PO2 (normally 1.6 or 1.4) / % Fraction of Gas (%O2)) -1 atmosphere) X 33 MOD=((PO2/FO2) - 1) x 33 or MOD = (33 X PO2/FO2)-33 Calculating EAD: Salt Water ((1- FO2/.79) X (D+33)) - 33 Fresh Water ((1- FO2/.79) X (D+34)) - 34 Calculating Surface Consumption Rate (SCR) in PSI/MIN: Salt Water: ((PSI used/Bottom Time) X 33) / Depth + 33 Fresh Water: ((PSI used/Bottom Time) X 34) / Depth + 34 Converting SCR from PSI/MIN to Cubic Feet/MIN: Cubic Feet/min = SCR X Tank Volume (full)/Fill Pressure Anyother equations you need? Here's another for calculating my free time: t=time (hrs) t=24=24 hrs. a day... Free time? Me? Here’s few more in case anyone has plans to do some tech diving:

PSIG = Pounds per Square Inch (Gauge) PSIA = Pounds per Square Inch (Absolute) ATM = Atmospheres ATA = Atmospheres (Absolute)

FSW = Feet of Sea Water FSWA = Feet of Sea Water (Absolute) FFW = Feet of Fresh Water FFWA = Feet of Fresh Water (Absolute)
“T” formula Partial Pressure
Total Pressure
% Gas
Partial Pressure = Total Pressure X % Gas

% Gas = Partial Pressure / Total Pressure

Total Pressure = Partial Pressure / % Gas
Calculating PO2: PO2 = Depth in atmospheres absolute (ATA) X percentage O2

PO2 = ((d+33)/33)XFO2 or PO2 = ((d/33)+1) X FO2

Calculating MOD: MOD = ((Maximum PO2 (normally 1.6 or 1.4) / % Fraction of Gas (%O2)) -1 atmosphere) X 33

MOD=((PO2/FO2) – 1) x 33 or MOD = (33 X PO2/FO2)-33

Calculating EAD: Salt Water ((1- FO2/.79) X (D+33)) – 33

Fresh Water ((1- FO2/.79) X (D+34)) – 34

Calculating Surface Consumption Rate (SCR) in PSI/MIN:
Salt Water: ((PSI used/Bottom Time) X 33) / Depth + 33
Fresh Water: ((PSI used/Bottom Time) X 34) / Depth + 34
Converting SCR from PSI/MIN to Cubic Feet/MIN:
Cubic Feet/min = SCR X Tank Volume (full)/Fill Pressure

Anyother equations you need? Here’s another for calculating my free time:
t=time (hrs)
t=24=24 hrs. a day…

]]> By: admin http://www.missfidget.com/2009/02/19/flus-thrives-in-winter/comment-page-1/#comment-1144 admin Thu, 19 Feb 2009 17:25:47 +0000 http://www.missfidget.com/?p=1507#comment-1144 sounds like you've got extra free time today. sounds like you’ve got extra free time today.

]]> By: wgmontgomery http://www.missfidget.com/2009/02/19/flus-thrives-in-winter/comment-page-1/#comment-1143 wgmontgomery Thu, 19 Feb 2009 15:38:11 +0000 http://www.missfidget.com/?p=1507#comment-1143 Converting relative humidity to absolute humidity is easy: The absolute humidity of the ambient air is the saturation humidity multiplied by the percentage relative humidity and divided by 100: Habs = (Hsat )(RH / 100) where: Habs = absolute humidity at a given temp Hsat = saturation humidity at the same given temp RH = percentage relative humidity at the same given temp First, you must calculate the saturation humidity at each of your temperature data points: Hsat = (7000)(18.02 / 28.85)(PS)/(Pamb - PS) where: Hsat = grains of water per pound of air 7000 = grains per pound 18.02 = molecular weight of water 28.85 = molecular weight of dry air (taken as 79 vol % nitrogen, 21 vol % oxygen) PS = vapor pressure of water at temperature T Pamb = ambient pressure (You will need a good set of steam tables to look up the vapor pressure of water at each of your temperature data points) Example calculation of Hsat at 68 oF and an ambient atmospheric pressure of 14.696 psia: From the steam tables, the vapor pressure of water is 0.3389 psia at 68 oF. Hsat = (7000)(18.02/28.85)(0.3389)/(14.696 - 0.3389) = 103.2 grains of water/lb of air Now if your relative humidity data point at 68 oF was say 60%, then: Habs = (103.2)(60/100) = 61.9 grains of water/lb of air. This gives new meaning to 'hot and bothered.' I decline to comment on the uh...humidity. Converting relative humidity to absolute humidity is easy:
The absolute humidity of the ambient air is the saturation humidity multiplied by the percentage relative humidity and divided by 100: Habs = (Hsat )(RH / 100) where: Habs = absolute humidity at a given temp Hsat = saturation humidity at the same given temp RH = percentage relative humidity at the same given temp First, you must calculate the saturation humidity at each of your temperature data points: Hsat = (7000)(18.02 / 28.85)(PS)/(Pamb – PS) where: Hsat = grains of water per pound of air 7000 = grains per pound 18.02 = molecular weight of water 28.85 = molecular weight of dry air (taken as 79 vol % nitrogen, 21 vol % oxygen) PS = vapor pressure of water at temperature T Pamb = ambient pressure (You will need a good set of steam tables to look up the vapor pressure of water at each of your temperature data points) Example calculation of Hsat at 68 oF and an ambient atmospheric pressure of 14.696 psia: From the steam tables, the vapor pressure of water is 0.3389 psia at 68 oF. Hsat = (7000)(18.02/28.85)(0.3389)/(14.696 – 0.3389) = 103.2 grains of water/lb of air Now if your relative humidity data point at 68 oF was say 60%, then: Habs = (103.2)(60/100) = 61.9 grains of water/lb of air.
This gives new meaning to ‘hot and bothered.’ I decline to comment on the uh…humidity.

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