Recent content by Baluncore
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Need help with pressurized air
There will be positional variation in the temperature of the compound, but the air within the chamber should be well mixed. Some TPMS measure the pressure and the temperature of the internal air. I have seen references to air temperature sensors placed inside the wheel for experimental...- Baluncore
- Post #32
- Forum: Mechanical Engineering
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Need help with pressurized air
The pavement cannot rise much more than 35°C above air temperature, because then, black body radiation to the environment will remove heat at the same rate that the sun can deliver energy to the pavement. At the same time, the pavement must be significantly hotter than the air and environment...- Baluncore
- Post #30
- Forum: Mechanical Engineering
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Need help with pressurized air
Conduction trumps convection. You talk of percentage change in tire pressure, yet the tire pressure due to excess water, is an absolute pressure = ppH2O, independent of the initial tire pressure. That is why the temperature of a tractor tire running 12 psi, is more effected than a truck tire...- Baluncore
- Post #29
- Forum: Mechanical Engineering
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Need help with pressurized air
The magnitude of the tire temperature rise will be speed and load related. I believe that the air in the tire will have a temperature of between 10°C and 20°C above the temperature of the pavement. You are considering only air temperature, while ignoring the higher pavement temperatures often...- Baluncore
- Post #27
- Forum: Mechanical Engineering
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Valsalva and Eustachian tube
When you blow up a party balloon, the pressure is initially high, then falls as the balloon increases in radius. The same may be true for the ET. It may naturally pinch off between the bubbles of air, with each bubble being at a different step in pressure. The bubbles then move along the tube...- Baluncore
- Post #15
- Forum: Biology and Medical
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Valsalva and Eustachian tube
So you want to know: if an open tube that contains gas, without any liquid present, will be full of gas, from one end to the other. I think your question now fits the answer that you want.- Baluncore
- Post #13
- Forum: Biology and Medical
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Why do my 2-pin TV and HT systems give shocks on ports when ON together?
The two devices need to share an earth, but they are two terminal plugs, so have A&N only. Being "double insulated" says you must not connect their internal chassis to earth. Have you turned one plug 180°, to see if the problem is related to polarity, A&N or N&A? When you feel the tingle, what...- Baluncore
- Post #10
- Forum: Electrical Engineering
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Valsalva and Eustachian tube
Sorry, I was asleep when I replied. Yes, gas can travel from side A to side B, as bubbles, between multiple fluid pistons, without there being a continuous air path between the sides A and B. That could occur when the fluid entering the ET contained bubble envelopes, that created fluid pistons...- Baluncore
- Post #11
- Forum: Biology and Medical
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Why do my 2-pin TV and HT systems give shocks on ports when ON together?
My guess is that one of them has a crossed A-N to make it N-E. Does one of them have a cable that can be removed, and plugged in the other way around, or are all plugs polarised to prevent a swap of the A and N? Try rotating a two pin power plug through 180° in the socket, that may temporarily...- Baluncore
- Post #8
- Forum: Electrical Engineering
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Valsalva and Eustachian tube
No. In some cases, when the ET contains a fluid, the fluid can move sufficiently to equilibrate pressure, without completely emptying the ET of the fluid. It comes down to a compression ratio; the volume of the inner ear, the volume of the ET, and the pressure difference.- Baluncore
- Post #4
- Forum: Biology and Medical
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Undergrad Measured Spectrum of Stopped Wood Organ Pipe Shows ALL Overtones
The third harmonic, at 3f, is the perfect fifth, in the octave above the fundamental. If you refer 3f to the octave it falls in, then the ratio will no longer be an integer multiple of the fundamental. It becomes 3ff/2 or 1.5ff, because you are not measuring relative to the fundamental, but...- Baluncore
- Post #30
- Forum: Classical Physics
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Undergrad Measured Spectrum of Stopped Wood Organ Pipe Shows ALL Overtones
The word overtone has become meaningless through variations in its usage, and that is why, when discussing the physics of sound generation, we should refer only to harmonics. The first harmonic is the fundamental, the second harmonic is twice the fundamental frequency, one octave above the...- Baluncore
- Post #28
- Forum: Classical Physics
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AC and Electrolysis
@Highlight There are thousands of scientists looking for ways to increase the efficiency of the electrolysis of water. Maybe you should ask Google AI separately about each of your ideas. That way you will discover more about the science, and in a more orderly manner. The electrolysis of water...- Baluncore
- Post #8
- Forum: Electrical Engineering
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Undergrad Pumping liquid around and draining a part of it, how much is lost?
Welcome to PF. Assuming the liquid is water, and the fluid is aerated water. Since the hydrostatic pressure in the tube depends on the liquid level in the barrel, the air will be more or less compressed in the tube. That will change the volume of air, not the mass of air. You drop the liquid...- Baluncore
- Post #3
- Forum: Classical Physics
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AC and Electrolysis
DC is more efficient than AC when you convert the AC to DC by using a rectifier bridge with a reservoir capacitor, or a big inductive choke. One reason is that the reaction runs continuously, without reversing or stopping. You get efficiency with DC by connecting many electrolysis cells in...- Baluncore
- Post #3
- Forum: Electrical Engineering