Recent content by Yeti08

At that density things that would normally float in water would float on air - though as I said before it is supercritical and actually more dense than liquid air at most temperatures. The difference between my answer and the previous is that mine uses real gas information rather than ideal gas...

What I don't think tuoni is considering is that air will be far from an ideal gas at such high pressures. From my data the pressure at which air and water will have the same density is about 517 MPa or about 5100 atmospheres at 25C. Of course this would be a supercritical fluid, and I'm not...

I usually use programs like EES or Refprop, but EES does cite it's source for CO2 properties: R. Span and W. Wagner, A New Equation of State for Carbon Dioxide Covering the Fluid Region from the Triple-Point Temperature to 1100 K at Pressures up to 800 MPa, J. Phys. Chem, Ref. Data, Vol. 25...

That's what I meant by "shades of white." Incandescent lightbulbs output a lot more red light than anything else, but they still look "white." A lot of the time you need to compare side by side different white lights to really tell the difference. You are correct, though, that there will always...

I think where you're misunderstanding lies is that objects aren't perfect absorbers/reflectors. If an object were to reflect at, and only at, a wavelength of 650 nm (red) then yes, it would not look white if white light were shined on it. However, a red object predominantly reflects red light...

Okay, now I see your point. I probably should have seen that myself...

You would not use saturated steam tables; you would use the compressed water tables and assume constant specific volume due to the rigid container, while varying the temperature. Then interpolate the pressure. What sort of material have you already covered? What equipment do you have access...

That explains that most of the energy in the process is going towards the heat of fusion. That doesn't say why the rates would be different for heating and cooling. So the majority of heat transfer occurs while the milk is at 32F, why does this effect heat transfer? I see this as a problem of...

Internal energy of water at 1 atm and 20F = -1428 kJ/kg. Internal energy of water at 1 atm and 45F = 30.34 kJ/kg. Given 1 gallon to be 3.78 kg that total change in energy comes out to about 1.43 MJ. (Data taken from EES) Those are the numbers from the original post, so that's what I used. My...

Yes, I should have said before that all the equations I listed use degrees, not radians.

Yes, that is correct. For solar time, noon corresponds to solar noon. I stated in my first post how to convert solar time to hour angle.

That's your actual longitude for the location. That difference in that equation is to correct for your actual location - while your "normal" time will stay the same while traveling across several degrees of longitude, your solar time will change.

It is the longitude that corresponds with your time zone. Examples in the US would be Eastern - 75oW, Central - 90oW, Mountain - 105oW, and Pacific - 120oW.

What equations are these? The saturation pressure is dependant on more than just temperature - it will change depending on the amount of water in the air. If you meant the saturation pressure of pure water vapor, then, yes, you can determine it from just temperature. To solve your problem...

Find solar time: Solar\ Time = Standar\ Time + 4\left(L_{st}-L_{loc}\right)+E where Lst is the standard meridian for the local time zone, Lloc is the longitude of the location, and E is defined by: E=229.2\left(0.000075+0.001868\ cosB-0.032077\ sinB-0.014615\ cos2B-0.04089\ sin2B\right)...