I recently had a question that was kind of like this:
What land has more types of whiskey then days in the year?
They put the answer as: Scotland
There is only one problem in Scotland whisky doesn't have an "e" in it.
Only in the US and Ireland do they spell whiskey with an "e". Ireland is one of the answers which is the answer I put for that reason.
Hozzászólások - Plumpkin
Oldal: 1
Quiz -> Quiz errors
Dátum: 2010.03.22. 10:20:36
Quiz -> Quiz errors
Dátum: 2010.03.16. 23:00:34
Which of the following is not a fish?
Stingray
Tuna
Shark
Dolphin
please remove
multiple answers are correct
Stingray
Tuna
Shark
Dolphin
please remove
multiple answers are correct
Quiz -> Quiz errors
Dátum: 2010.03.07. 15:34:21
I clicked the wrong answer on the last question I submitted:
What is from Latin and means "towards the center" ?
friction
centrifugal
advection
centripetal
The real answer is: centripetal
The incorrect answer I clicked on by accedent: centrifugal
What is from Latin and means "towards the center" ?
friction
centrifugal
advection
centripetal
The real answer is: centripetal
The incorrect answer I clicked on by accedent: centrifugal
Quiz -> Quiz errors
Dátum: 2010.02.24. 20:47:57
One note on this question is that it isn't common knowledge:
Most conditions dealing with atmospheric pressure deals with the compression and expansion. Adiabatic cooling and warming in relation to the volume of said substance whether it is gas,liquid, or solid will determine the phase that it is in.
The pressure/temperature chart (called a phase diagram) does exist for
ice/liquid water as well as many other systems. The co-existence curve for
ice and water obeys the Clapyeron equation. That equation states that:
dTm/dP = Tm*dV/dHm
where Tm is the melting point, dTm is the change in the melting point, dP is
the change in pressure, dV is the change in the volume of melting, and dHm
is the heat of melting. Plugging in the numbers, one obtains for water:
dTm/dP = -7.4x10^-3 K/atm. That is for water an increase in pressure results
in a lowering of the melting point (by a small amount). For most substances
dTm/dP > 0. It is negative for water because the dV of melting of ice is
negative.
Note: one obtains for water:
dTm/dP = -7.4x10^-3 K/atm. That is for water an increase in pressure results
in a lowering of the melting point (by a small amount). For most substances
dTm/dP > 0. It is negative for water because the dV of melting of ice is
negative. In order to lower the freezing point of water 1 C. requires a pressure of
135 atm!
Most conditions dealing with atmospheric pressure deals with the compression and expansion. Adiabatic cooling and warming in relation to the volume of said substance whether it is gas,liquid, or solid will determine the phase that it is in.
The pressure/temperature chart (called a phase diagram) does exist for
ice/liquid water as well as many other systems. The co-existence curve for
ice and water obeys the Clapyeron equation. That equation states that:
dTm/dP = Tm*dV/dHm
where Tm is the melting point, dTm is the change in the melting point, dP is
the change in pressure, dV is the change in the volume of melting, and dHm
is the heat of melting. Plugging in the numbers, one obtains for water:
dTm/dP = -7.4x10^-3 K/atm. That is for water an increase in pressure results
in a lowering of the melting point (by a small amount). For most substances
dTm/dP > 0. It is negative for water because the dV of melting of ice is
negative.
Note: one obtains for water:
dTm/dP = -7.4x10^-3 K/atm. That is for water an increase in pressure results
in a lowering of the melting point (by a small amount). For most substances
dTm/dP > 0. It is negative for water because the dV of melting of ice is
negative. In order to lower the freezing point of water 1 C. requires a pressure of
135 atm!
Oldal: 1