Sorry to bump this old thread but despite all the help I still have some issue with this problem.
How can the final pressure in the 50 litre cylinder be calculated without knowing the final temperature?
Similarly, how can the final temperature in the 50 litre cylinder be calculated without...
I'm stuck with this for a couple of reasons:
I'm trying to work out the final pressure in the 50 litre cylinder but I don't know the number of moles of gas that leaves the cylinder or the final temperature of the cylinder, so the ideal gas equation alone can't help.
To work out the number of...
Thanks to everyone who has commented. I've responded to your comments below.
I think that I can work out what the answer would be if the process was isothermal but I would like to compare the results for this specific example.
I wasn't until now. I've searched for some examples and realised...
I want to work out how to calculate the pressure change in a gas cylinder if it is used to fill another cylinder to a lower pressure.
For example, if a 50 litre gas cylinder initially at 200 bara is used to fill a 600 litre cylinder from atmospheric pressure to 1.5 Bara. What would the change...
If I need to make a measurement to check compliance e.g. measuring component dimensions. How do I know what accuracy is required for the measuring instrument if the tolerance is not specified?
For example, during an engine rebuild, the manufacturer specifies the valve stem diameter to be...
Would it be appropriate to assume a rectangular probability distribution for the calibration tolerance (blue line in the previous figure) and combine it with the expanded uncertainty of the calibration (green error bars) using the root sum squares method to obtain a standard uncertainty for the...
Hi thanks for the reply. That is essentially my understanding and I think that the common requirement for a Test Accuracy / Uncertainty Ratio of 4:1 or even 10:1 validates your statement.
It has got me thinking though. When considering the uncertainty of a measurement made by an instrument with...
Often a calibration certificate for an instrument has the error found during the calibration as well as the uncertainty associated calibration itself.
I'm reasearching uncertainty calculations using the GUM 1995 method and I haven't found one yet that includes the uncertainty of the calibration...
Thanks for the response. There are a lot of options to choose from and I'm going to have a look in more detail. It's disappointing that the so called standard text doesn't introduce the subject at a more fundamental level.
I was recommended to read Physics of Semiconductor Devices by Sze which I was told was the standard textbook for the subject. My background is Electronic Engineering and not physics. After reading the first few pages of the first chapter I am completely overwelmed. I can't make sense of the...
Thanks for the reply that is very helpful. On most system curves I have seen the friction factor is used or K factor for fittings etc. Do I just add the head loss due to Cv directly from the flow rate equation for a valve or do I need to convert to a K factor first?
How do you calculate the flow rate and differential pressure (the operating point on the pump curve) for a centrifugal pump if all of the flow is through a single control valve with known ##C_V##, discharging to atmosphere?
Clearly the flow rate and differential pressure of the pump will be...
It appears to be a discrete I/O module operating on AS-I bus that has 4 PNP inputs and 4 relay outputs. Presumably a host PLC or similar that supports AS-I bus can address the I/O.
Thanks forthe replies. I thought that ##I_S## was an incredibly small number, something like ##10^{-9}## which would mean that unless the resistance was huge the output would be really small.