Physics - (Untitled, random question)
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3 glass bulbs, each filled with water, mercury and ethanol respectively are placed in a hot water bath. The liquid in each glass bulb is at the same level at the start. What is the correct level of the 3 liquids after hot water bath is heated for 15 minutes? (Estimate)
Are the liquids at same level? Initially I thought ethanol would be at lowest level followed by water and mercury (according to their boiling points). But after much thinking, it is weird to say ethanol is at highest level because it will soon boil right? (leaving less ethanol in the glass bulb) Even if I state the position the opposite way round, it's still funny because how can the mercury level suddenly increase?(if yes, you're actually saying there are more volume of mercury in the glass bulb)
Or is it that all levels of liquids decrease?
Pretty curious about this question. Can someone explain? Thanks.
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Expansion ma...lol, did you just answer your own question?
Once you grasp that and evaporation, I think you'll be able to figure the rest out.
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Originally posted by SBS2601D:
Expansion ma...lol, did you just answer your own question?
Once you grasp that and evaporation, I think you'll be able to figure the rest out.
Huh answered my own question? I didn't, I merely state the possible results. Which phenomenon you talking about? Haha. -
i think you have to factor in expansion?
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Originally posted by anpanman:
Huh answered my own question? I didn't, I merely state the possible results. Which phenomenon you talking about? Haha.
You asked how come the mecury level goes up?Oops, sorry, I misconstrued your sentence....but if that's what you say, your physics foundations are in doubt...
You simply cannot forget expansion overnight.
Even if its just a glass bulb, expansion still takes place without the tube sticking out ma.
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ethanol decrease- evaporeate
mercury expand - use in therm
water i dunoe - depend on temp
or got 1 formula got involve heeight in the manometer... X.X
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question is, how hot is the water bath
and any graphics on the glass bulbs? Are the bulbs sealed?
There's mercury in glass thermometer, and there's also alcohol in glass thermometer
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It is an enclosed lightbulb, so no evaporation. What we are looking at is thermal expansion. Just check out the expansion coefficients, aka CTE or TCE, then you just see relatively which one is more or less you get answer already.....lol
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Originally posted by nightzip:
It is an enclosed lightbulb, so no evaporation.
What we are looking at is thermal expansion. Just check out the expansion coefficients, aka CTE or TCE, then you just see relatively which one is more or less you get answer already…..lol
There will still be evaporation...unless the air inside is saturated with the liquid concerned.