Timeline for Why doesn't ice in a glacier feel as cold when I touch it as the ice I get from my freezer?
Current License: CC BY-SA 4.0
15 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Jul 11 at 17:38 | history | bounty ended | Enlico | ||
| Jul 11 at 17:37 | vote | accept | Enlico | ||
| Jul 11 at 9:58 | history | edited | Roger V. | CC BY-SA 4.0 |
added 108 characters in body
|
| Jul 11 at 9:36 | history | edited | Roger V. | CC BY-SA 4.0 |
added 1571 characters in body
|
| Jul 11 at 8:58 | comment | added | Roger V. | @Enlico I expanded the answer to include the information in my earlier comments and your request for more details. | |
| Jul 11 at 8:55 | history | edited | Roger V. | CC BY-SA 4.0 |
added 2842 characters in body
|
| Jul 11 at 8:23 | history | edited | Roger V. | CC BY-SA 4.0 |
added 1817 characters in body
|
| Jul 9 at 18:57 | comment | added | Enlico | I am the one who asked the question. You are the one who's giving an answer? Good, demonstrate some knowledge and put down some numbers to support your claims. | |
| Jul 9 at 18:56 | comment | added | Enlico | You clearly don't know what you are talking about. The greater is the heat capacity, the more heat is required to raise the temperature by 1 degree that amount of matter. I'm not saying I can melt the iceberg, but that I can melt a thin-as-you-like layer of ice. Thin-as-you-like means that the capacity is 0, which means that the surface in contact with my body will immediately raise as I touch it (an mine will lowers immeditaly, but if the ice temperature was close to 0, it will be likely be faster than me; unless its very conductive, which I don't think..). | |
| Jul 9 at 17:35 | comment | added | Roger V. | @Enlico full heat capacity is proportional to size, which is why it is called extensive. The greater is the heat capacity, the more heat is required to raise the temperature by 1 degree. The sensations are quite different, if you hold a cocktail ice cube vs. leaning on a huge block of ice. One cannot melt an iceberg by the body heat, and burns from very cold objects are a real thing. | |
| Jul 9 at 17:12 | comment | added | Enlico | Capacity and size are both extensive quantities, so they have absolutely nothing to do with what happens at the contact surface of two bodies. | |
| Jul 9 at 17:12 | comment | added | Enlico | Yes, my body has not a constant temperature, but still, no part inside of my body has a temperature close to 0°C, and if a piece of my skin goes to 0°C because it's in contact with, say, ice, I will perceive as "cold" the gradient between the outermost layer of my skin and whatever the layer is were receptors are. | |
| Jul 9 at 16:57 | comment | added | Roger V. | @Enlico you are mistaken on at least two counts: 1) that the temperature of human body is uniform - it is not, and this is even taken into account in medical setting - taking temperature on forehead, armpit and in mouth produces different results. 2) when two objects touch each other, the outcome depends on their heat capacity, size, relative temperature, etc. | |
| Jul 9 at 16:32 | comment | added | Enlico | the ice surface and the surface of one's hand are both at the same temperature, so nearly nothing happens during a brief touch that's a totally incorrect statement. Ice is by definition at <= 0°C (at ambient pressure), and I am a human, so there's no part of my body below 0°C. At all. So when I put my hand in contact with a slightly-below-zero ice, it's surface will quickly rise up to 0°C and then start to melt. | |
| Jul 9 at 8:45 | history | answered | Roger V. | CC BY-SA 4.0 |