11. Ice cream sold in supermarkets are now kept in plastic containers. Are there any other advantages of using plastic containers over tin containers?
12. During hot weather, sprinkling a little water on the floor can cool a room, why?
13. How does an electric fan give a cooling effect on hot day?
14. Give the difference between evaporation and boiling
15. A refrigerator without a thermostat will not function as efficiently as one that has a thermostat. Why? Explain
2006-10-13 20:28:17 · 8 answers · asked by arwin daine t 1 in Science & Mathematics ➔ Physics
Arwin, get off of that darned computer and DO YOUR OWN HOMEWORK!
2006-10-13 20:35:37 · answer #1 · answered by voice of reason 2 · 0⤊ 0⤋
11. "Other" advantages"? Name one.
12. Evaporation.
13. Evaporation and conduction. Moving air conducts heat away from your body better than still air does.
14. When a liquid boils, all of its molecules are at the boiling temperature. Evaporation uses the property that even though a liquid may have a temperature below the boiling point, each of the molecules in the liquid has some different energy level. The molecules with enough energy to escape as a gas do so, leaving their less energetic cousins behind.
15. A refrigerator without a thermostat? How can that work at all? How will the temperature be kept at the desired level? Will someone have to be looking into the refrigerator now and then and turn it on and off to maintain the correct temperature? That's like asking how a toilet tank will work if it has no float ball to turn off the water when it's full.
2006-10-13 20:30:29 · answer #2 · answered by ? 6 · 0⤊ 0⤋
11-container not reactive, 12-evaporation and heat absorbed causes cooling, 13- Due to the draft of air,14-evaporation is a process due to atmospheric heat and boiling you provide a heat source,15- Thermostat is a feedback element that cuts off the compressor when desired cooling is achieved. It saves energy and prolongs the life of the compressor. Without the thermostat how will the compressor cut off?
2006-10-13 23:09:07 · answer #3 · answered by openpsychy 6 · 0⤊ 0⤋
11.Ya, tin rusts and plastic dont.
12. Cause it does.
13.Cause it is going in circles?
14.Boiling is when something is to it's hottest point, evaporation is leaving?
15.Because it don't know the temperature?
Good Luck & God Bless
2006-10-13 20:31:34 · answer #4 · answered by Anonymous · 0⤊ 0⤋
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2016-12-13 07:58:42 · answer #5 · answered by zell 4 · 0⤊ 0⤋
12. when water evaporates, it also takes heat with it....
2006-10-13 20:37:27 · answer #6 · answered by tehchineseboi 3 · 0⤊ 0⤋
of my god, you have started thinking my dear physict
2006-10-13 20:34:14 · answer #7 · answered by Alen 4 · 0⤊ 0⤋
you think to much!
2006-10-13 20:29:45 · answer #8 · answered by ann.natalie 4 · 0⤊ 0⤋