- #1
SheCanBuild
- 9
- 0
Hi ya'll,
We debated in class...Dr Mir had clearly stated during his lecture that the mass, of water won't change even if the temp does. He said "yes the volume will expand and contract, with temp change, but the MASS won't" Anyway he assigned this question: 'What is the difference in weight of 50 gal of water at 39F and at 77F?'
Well we've been doing a lot of interpolation this week finding the density of water at diff temps, so it was automatic for most of us to start messing with the convertion to celcius then to find the density at each temp using the table, and interpolating...some of us began to wonder if we even needed to do anything.
Is it safe to say that since: wt=mg, and if the m has not changed the wt too remains the same? Then we debated over gamma=wt/volume. But density and volume directly relate to each other in an oppisite fashion with temp change would they still need to be concidered or can we ignore the density and volume...well ignore all the values the question states? Are we completely over thinking a trick question? Or were we on the right track to begin with?
Thanks vm,
Ronelle
We debated in class...Dr Mir had clearly stated during his lecture that the mass, of water won't change even if the temp does. He said "yes the volume will expand and contract, with temp change, but the MASS won't" Anyway he assigned this question: 'What is the difference in weight of 50 gal of water at 39F and at 77F?'
Well we've been doing a lot of interpolation this week finding the density of water at diff temps, so it was automatic for most of us to start messing with the convertion to celcius then to find the density at each temp using the table, and interpolating...some of us began to wonder if we even needed to do anything.
Is it safe to say that since: wt=mg, and if the m has not changed the wt too remains the same? Then we debated over gamma=wt/volume. But density and volume directly relate to each other in an oppisite fashion with temp change would they still need to be concidered or can we ignore the density and volume...well ignore all the values the question states? Are we completely over thinking a trick question? Or were we on the right track to begin with?
Thanks vm,
Ronelle