a 72 degree room, which one will reach room temperature first? Why? This debate has occupied 20 minutes of mine and my co-workers time... please help us answer this so we can get back to work!
2007-09-27 04:22:11 · 9 answers · asked by Anonymous in Science & Mathematics ➔ Physics
This will depend on several factors missing in your equation. It may be true that both will reach room temperature at the same time if there was a solid-solid contact. This is conduction. However, you need to consider other factors.
1. Radiation: Are there any radiation sources in the room? This will add energy to both glasses.
2. Convection: What are the conditions of the air around the glasses? How humid is the air? The hotter glass will have a larger wall, or what is called "boundary layer", of air around it, acting as an insulator.
3. Conduction: Is there conduction of heat between the glasses and the platform on which they rest?
2007-09-27 04:36:24 · answer #1 · answered by hmata3 3 · 1⤊ 2⤋
The 62 degree glass
2007-09-27 04:30:08 · answer #2 · answered by Anonymous · 1⤊ 1⤋
I'm assuming that they both have the same mass of water and the same 'shape' (same amount of surface area). If that's true, then they'll both hit 72 degrees at the same time. Thermal flow depends on delta Temp. and cross sectional area, and the water temperature depends only on thermal energy present and quantity of water.
Doug
2007-09-27 04:29:56 · answer #3 · answered by doug_donaghue 7 · 3⤊ 0⤋
they will both reach room temperature at the same time. the only thing that influences the transfer of heat (in or out) is the difference in temperature. since both glasses have a temperature that is different from room temperature by ten degrees, the heat transferred in and out of them will be at the same rate.
2007-09-27 04:35:04 · answer #4 · answered by michaell 6 · 3⤊ 1⤋
I imagine it would lose heat faster than it would gain it at room temperature.
2007-09-27 04:26:26 · answer #5 · answered by Anonymous · 0⤊ 2⤋
the higher one ,water has a high heat index it will give off the heat faster than the cooler one will absorb it
2007-09-27 04:31:13 · answer #6 · answered by randall g 3 · 1⤊ 1⤋
lower one because it has less molecular kinetic energy to lose than the one at the higher temp.
2007-09-27 04:27:05 · answer #7 · answered by Anonymous · 1⤊ 1⤋
it is obvious that they will both reach at the same time.............
the same change in temperature..........
the same substance...........
so the same time..........
2007-09-27 04:57:52 · answer #8 · answered by puregenius_91 3 · 1⤊ 0⤋
Same T Delt, Same Time............
..
2007-09-27 04:25:21 · answer #9 · answered by muddypuppyuk 5 · 3⤊ 0⤋