- #1
jackson6612
- 334
- 1
Today I went along my uncle to get the natural gas cylinder refilled. He uses it at his farm. When the refilling man placed it on the weighing scale it weighed, let's say, 7 kg. During the refilling process the cylinder was placed on the scale. Once he removed the refilling pipe after the cylinder was full with 8 kg gas, the reading came to almost 7 kg. I don't know why I think that person cheated.
I could be wrong in my observation. Obvious that refilling pipe was also exerting some of its weight on the scale while connected to the cylinder. I think this is how the process went: placed the cylinder on the scale and weighed it, then connected refilling nozzle and pressed a button on the scale to get the weight value 0 kg so that the weight of only the newly refilled gas is measured, after refilling he removed the nozzle and the scale reading went down.
That would mean that the weight of refilling pipe was not included. When the gas was being refilled, wasn't it exerting an additional pressure on the cylinder? Suppose, you have a jar on the scale and holding a water pipe above it which is ejecting water at high pressure into the jar. Let's suppose the jar has been filled with some water, then once the water is stopped coming out of the pipe, the reading, whatever it was previously, would go down because there is no 'additional' pressure. Right.
NOTE: I'm not a science or physics student.
I could be wrong in my observation. Obvious that refilling pipe was also exerting some of its weight on the scale while connected to the cylinder. I think this is how the process went: placed the cylinder on the scale and weighed it, then connected refilling nozzle and pressed a button on the scale to get the weight value 0 kg so that the weight of only the newly refilled gas is measured, after refilling he removed the nozzle and the scale reading went down.
That would mean that the weight of refilling pipe was not included. When the gas was being refilled, wasn't it exerting an additional pressure on the cylinder? Suppose, you have a jar on the scale and holding a water pipe above it which is ejecting water at high pressure into the jar. Let's suppose the jar has been filled with some water, then once the water is stopped coming out of the pipe, the reading, whatever it was previously, would go down because there is no 'additional' pressure. Right.
NOTE: I'm not a science or physics student.