Why does putting a cloth over a canteen help it stay cool?
A cloth on a canteen helps cool the canteen only if it is kept wet.
When water evaporates what it is doing is changing state from a liquid state to a gaseous state. The water doesn't change temperature at all but it requires the addition of heat to change state. That heat is called the latent heat of vaporization. The latent heat of vaporization for water is 1060 BTU/lb. That is quite a bit. When the water in the canteen cover evaporates it has to draw heat from somewhere. It draws it from the canteen skin which, in turn, gets it from the canteen contents, and cooling the contents.
If the canteen cover dries the process stops and heat flows in the other direction (from hot to cold). The cover probably provides a little insulation value, but not very much.
Check this out. You might find it interesting. Fifty years ago it was not unusual to find something like this hanging from a front bumper. It looks like they are still available.
If any gal takes sex pleasure with the help of putting cloth between her vagina after puberty then what will be the effects on her?
None at all Read More
If the patient is suffering from heat-stroke, cooling, shading is important. Sipping cool water will also help, but avoid very cold water. A cool cloth on the forehead, back of the neck, will also help to bring the temperature down. Read More
The surface area of the coffee is increased to the air. This speeds up the cooling of the coffee. Read More
Actually, no i cannot. My Aunt is a doctor and she says that it cannot. It will reduce the pain but it will not help the pink eye to heal. All the heat does is numb it for a little while. Read More
it means that they are either getting scared or angry. or even meaning they want to be left alone. If your rabbits ears are hot it is either over heated (too hot and trying to cool it's self off by circulating the blood thru the large veins in it's ears) or it has a fever. If it is too hot you can help it cool off by putting a cool cloth on it's ears and… Read More
I imagine it's the same for anyone. Try to cool their temperature. Be sure they are staying hydrated, too. Bring down their temp by sticking something cold under their armpit, perhaps a cool sponge bath. Webmd.com is a great resource. Tylenol extra strength can be used to lower a fever. Ibuprofen can also be used for fever to reduce pain or any discomfort. Taking a bath may help bring down a fever. Also trying putting… Read More
Write a letter to the canteen manager of your school complaining about the condition of the canteen and the quality of food?
A letter of complaint should start with addressing the person the letter is being sent to, and a detailed explanation of the complaint along with any solutions that could help the problem at hand. Read More
Help nervous cats by putting them in a cool, calm place where they can eat and use the litter box without interference. You can also lightly massage their forehead/top of the head with three fingers. Many also enjoy being brushed. Read More
Pour it into shallow containers, less than 3" deep, and let it cool so it is no longer steaming. Stirring it occasionally should help the process. This should take less than 30 minutes. Then put it in the refrigerator. Read More
A warm wash cloth and some green mint tea will help a haedache Read More
putting something ( the patient's hand ) on the cut immediately. it's really work. i sometimes put my hand on my wound. Place clean dry cloth on the wound then apply pressure. If the cuts are severe, seek medical help. Read More
No, it won't help in any way. Read More
If a heat stroke is suspected, immediately call emergency help or go take the person to a hospital. While waiting for help, try to cool the persons core body temperature by wetting their skin or putting ice packs in their armpits, groin, neck, and back. Read More
they drink lots of water and lay down in the shade during the day and might jump in to a pond or pool to cool off on hot days You can help your dog to stay cool by putting a cool vest onto your dog, which is a cool dog coat which cools your dog down naturally using the evaporation method. Ruffwear make the Swamp Cooler cooling dog vest which you simply soak in cold… Read More
Wrap it in a cool wet cloth to ease some of the pain, have the person sit down and watch them until paramedics or other medical help arrives. NEVER APPLY ANY CREAMS OR JELLYS...you could make it worse, let the medical people deal with it. Read More
the way you can help pandas live is putting them back in to their envioments Read More
One can find directions to make cloth baby diapers by searching websites such as northern baby, TLC home, Youtube and dollarstoremom, these will help you to make cloth diapers. Read More
yes can you help me Read More
It was cool so China was cool with them Read More
poor people can be help by people give money, food, cloth and build some so their can build good home. poor people can be help by people give money, food, cloth and build some so their can build good home. Read More
It can help with keeping them cool because brushing removes a lot of excess hair. Read More
If a phone screen is cracked or broken, putting the phone in the freezer will not help the crack. If the display is not working properly, putting the phone in the freezer for a short time might help but it shouldn't be left in the freezer for longer than a few minutes. Read More
a j cloth is a piece of material that help clean fur nicer around the house hold and is blue with white strips and costs 89p Read More
By flapping them to cool their neck like a fan. Read More
they have a hard shell to hide in to help them stay cool/warm Read More
You can almost always manage to handle the fever. You can give him tablet paracetamol 500 mg. Then you can keep a wet and cloth on is body. Do not use the cold water, but instead a warm water. Start vigorous fanning. Within no time the cloth will be cool and baby will not feel uncomfortable. You can use rather cold water on the limbs. With the help of a piece of cloth, you can… Read More
a dog's paw pads help it cool down by releasing swet through sweat glands located on the paw Read More
Yes, platypuses are very cool and you should try and help them stay alive. I hope you all try to help them because they are very important. Read More
N2 characteristics is cool and O2 is hot, so its help to cool o2 before take breath in our body. Read More
The Phoenicians were famous for their purple cloth and they used shellfish for their purple dye in order to dye the cloth which is created only for the robes of the kings. hope this can help :) Read More
After running, putting your hands on your head opens up the airway which allows more air to come in/go out. Read More
A warm wet cloth on your forehead might help. I have even used a heating pad on my head (on medium) when I had a headache, and it helped. An icepack or ice wrapped in a cloth might help. You have to experiment and see what feels best to you. Read More
A warm cloth or warm shower will help the milk "let down" or release, but it will not help produce milk. Milk production is caused by stimulation of the breast such as the baby suckling, manual expression, or use of a breast pump. Read More
What is the first step to care for an elderly person who is suffering from a high body temperature as a result of extreme heat?
Have the elderly, overheated person lie down, and place a damp cloth on the forehead. Then after that treat them for shock. Also if they are okay enough give them something cool/cold to drink so to help them cool down there body temperature, and put them in shade. Or if near a building take them inside if you are sure you can move them carefully. Read More
They help by prising people out of small places and by putting out fires. Obviously hospitals help heal the wounded. Read More