 | How is it that you can have both water and ice at 0 C and both water and steam at 100 C? A lot of energy goes into these phase transitions. Why doesn't it change the temperature? |
| If you have steel and wood at 0 C, which feels colder? If you have steel and wood at 100 C, which feels hotter? |
| Will hot water freeze into ice cubes faster than cold water in your freezer? |
| If you have a cup of coffee which is too hot to drink, should you add cream to it immediately to cool it or let it stay black and sit for a while before adding cream? The object is to get it cool enough to drink in the shortest possible time. |
| What is the difference between evaporation and boiling? |
| If you heat a uniform metal plate with a hole in it, will the hole get larger or smaller? |
| Heat flow is normally from a high temperature toward a low temperature region. How do you manage to cool your body on a July day when the temperature is 102 F (compared to 98.6 F normal body temperature)? |
| Everyone knows that heat flows from a hot area to a cold area. How then does your refrigerator get it to flow from the inside of its freezing compartment to the warm outside, "uphill" for heat? |