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May
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comment Is this how I find the rate of change of internal energy for filling a vessel?
@KyleKanos how would I use the T-ds equation to find an expression for $\frac{ds}{dt}$? I wanted to use $T\frac{ds}{dt}=\frac{du}{dt}+P\frac{dv}{dt}$ but T in the tank is changing with time. And it doesn't look like i could apply the product rule to that since it's already in the differential form
May
1
comment Is this how I find the rate of change of internal energy for filling a vessel?
yes i have all the variables. I just wanted to know if that step was right. I was given the expression for the change in pressure, and i determined change in $v$ with the ideal gas law. and i found dhdt by the energy balance
May
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asked Is this how I find the rate of change of internal energy for filling a vessel?
Apr
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Apr
18
comment Thermal resistance of thermal interface materials?
@ThePhoton It all makes sense now that I remember the coolant is being constantly replenished and I assume it's a constant temperature. Thanks guys
Apr
18
comment Thermal resistance of thermal interface materials?
Lets say the chip needs to operate at $T_H$ and it dissipates constant 2 W. If we have a low total resistance, then doesnt that make the coolant temperature very close to $T_H$? But you just said you want it as low as possible. This is why I am getting confused
Apr
18
asked Thermal resistance of thermal interface materials?
Apr
14
asked How do I determine resistivity from electron defects of high purity gold?
Apr
14
accepted RMS Free Path vs Mean Free Path
Apr
13
comment RMS Free Path vs Mean Free Path
I have no idea what to even do with that honestly. I am not a molecular physics guy. I just need to find a formula for RMS free path and there is nothing on google.
Apr
13
asked RMS Free Path vs Mean Free Path
Apr
11
comment Molecular mean free path probability
I'm not really sure what kind of variable the $\xi$ is. It is just the distance the molecule will travel without a collision. I'm guessing it's continuous since it can be 0.01 or 0.012 or 0.013. Are you essentially saying that I should take "at least" and "greater than" to be the same?