if two mercury thermometers are of same volumetric dimensions, same mercury filled in it.one is 0 to 50 degree centigrade(celcius) and other 0 to 500 degree celcius . How is this possible. I need reply by 10th september! please help me!
2006-09-07 06:08:42 · 10 answers · asked by HAS 1 in Science & Mathematics ➔ Engineering
The dimensions of capilary inside is also same, impurities in mercury is also same .
2006-09-07 06:20:19 · update #1
Wow, weird question. Maybe the pressure inside could be greater in the 500 thermometer? Just an idea.
2006-09-07 06:11:09 · answer #1 · answered by David M 2 · 0⤊ 0⤋
Two mercury thermometers are of same dimensions.
capillery sizes of both are same.impurities are also same.
Thermometer works on the principle of vapour pressure.
Then there is no science that one is 0 to 50 and other 0 to 500 degree celcius .
Only matters is that the both the thermometers are graduated for full length? If not then it is possible.
2006-09-07 07:21:32 · answer #2 · answered by Anonymous · 0⤊ 0⤋
Pegminer has already given an excellent answer. There are research grade mercury thermometers with 0.1 C divisions. I have 2 or 3 in my lab, and more than 20 of the 1 C per division type. I use thermocouples almost exclusively now. One of my students broke a thermometer trying to remove it from a cork and cut his palm. The paperwork that followed caused me more pain than the student felt. I will donate my mercury thermometers to any educational or research institution that asks for them. It is technically feasible to read a mercury thermometer to better than 0.1 C precision. One method would be to measure the capacitance of the thermometer tube in the measurement region. Mercury has a very different dielectric constant than air, so a change in the level of mercury would give a change in capacitance and hence a change in voltage that can be measured with high precision. The mercury level could also be measured to within a few microns optically with a photo diode array. Mercury makes a very good mirror. If the thermometer was used as one arm of a Michelson interferometer, the level of mercury could be measured with a precision of a few nanometers corresponding to a change in temperature of perhaps 1E-5 K.
2016-03-27 01:36:41 · answer #3 · answered by Shelley 4 · 0⤊ 0⤋
Are you absolutely sure they're the same dimension? Remember that the overall size of the thermometer isn't important, only the inner diameter. Even a very small difference here will have a major effect on the scale of the thermometer, but will not be perceptible to your eye.
2006-09-07 06:11:49 · answer #4 · answered by Anonymous · 0⤊ 0⤋
Hi. Assuming you mean their EXTERNAL volumetric dimensions then the mercury expansion area (the silver line that you see) must have a different diameter. Larger in the case of the 0-500 C.
2006-09-07 06:12:11 · answer #5 · answered by Cirric 7 · 0⤊ 0⤋
Mercury boils at 357 degrees C. Better check the label (graduations?) again. Good luck.
2006-09-07 07:24:45 · answer #6 · answered by Kes 7 · 0⤊ 0⤋
Are you certain that you have 2 thermometers and one of them is not a barometer.
2006-09-15 00:28:45 · answer #7 · answered by LeBlanc 6 · 0⤊ 0⤋
Perhaps the density of the mercury is different in each thermomater?
2006-09-07 06:16:50 · answer #8 · answered by marchain_ca 2 · 0⤊ 1⤋
the size of the capillary in the 0-50 is like this ------------ the 0-500 is like this |||||||||||||||||||||||||. just the size is all.
2006-09-14 07:22:58 · answer #9 · answered by midi_junkie 3 · 0⤊ 0⤋
the size of inside capilarry and marking(graduation) matters
2006-09-07 06:11:39 · answer #10 · answered by Freddy 3 · 1⤊ 1⤋