Why does the smoke come from the ice or from any cold object and where does it come from?
Smoke is a visible suspension of carbon or other particles in air, typically one emitted from a burning substance. Therefore, ice cannot emit smoke. At certain times, we see a block of ice emitting some gas like fumes - only it is not gas or vapour, but tiny droplets of water.Water boils at 100ºC and freezes at 0ºC at sea level. At 0ºC water is in equilibrium with ice and vapour. At lower temperatures it is sublimating (transforming from solid to vapour directly) or at higher temperature it is evaporating. (liquid to a gas).When ice is exposed to air, the humidity in the air around the ice (water content of the air) condenses into tiny droplets, which we see as fumes or vapour. Condensation is the process by which a gas cools and becomes a liquid.Water vapour is invisible.
Why does hot air retain more water than cold air?
Actually, air does not hold water. Warm air often has more water molecules than cooler air but this is because of the energy level of the water particles. To understand this, we must first understand what air is. Air is filled with stuff! When air is warmed the water molecules in the air are also warmed, giving them more energy. When water molecules have more energy they are less likely to condense (you can learn more about water condensation and the water cycle here). Therefore, warm air, which is filled with highly-energized water molecules, often contains more water molecules than cooler air, which is filled with water molecules that more easily condense and become water.
Why does steam rises from ice?
Sorry i didn'tget you but if i am right the foggy substances we see arround the ice cube thats you are taking about!!So thats the water vapour not steam ( steam is also gasious form of water but it contains more latent heat than water vapour thus a steam can cause a burn injury but a vapour of water is that we live side by side has no harm having minimum heat to remain in gasious form) , it not accually emitts from concerned ice cube rather it is the water vapour already present in the air but too small to see , as the current temparature of atmosphere made it to remain scattered , now when the ice cube is brought to the system then it stars to gain heat from atmosphere to equalize in temparature thats a lengthy process so in that time the atmosphere surrounding the cube became cooler and so did the moisture(water vapour) in it as the temperature getting low the particles comes closer to each other as a result of decreasing the internal energy of themselves so they form relatively large particles (by joining) of vapour that you can visualize..and the foggy or smokey effect forms …its the same process of formation of clouds just involving the temperature decrease due to increase in altitude.Hope you are satisfied.
Will my clothes dry faster in a room with an air conditioner?
Air conditioners dehumidify ( removal of moisture ) the air in the room in order to render comfortable working environment.As the air moves across the evaporator coil, the coil absorbs heat and also wrings out moisture. The air now has a cooler temperature and is drier, so when it comes out of the vents , it mixes with room air and makes the room more comfortable.Drying is the process of removal of moisture where the driving force is the difference in the partial pressure (amount of liquid) of the solid and the vapour pressure of the air in the room. So when the moisture of the room is lowered, driving potential for drying is higher which in turn dries the clothes faster.
Why does a fan make things colder?
A fan increases the amount of heat that can be removed from a heat source when compared to convection (natural air movement caused by "hot air rising"). This relies on the source of heat being hotter than the surrounding air. It is very noticeable that the fan carries heat away from the radiator of a car engine. When blowing on your skin the air can be hotter than your skin and still cause cooling, because the air flow causes increased evaporation of sweat on the skin. The evaporation process draws heat from its surrounds, so the skin can be cooled. This is the principle of "wet bag" air-conditioning too. Note that evaporation only works if the air is relatively dry (not already saturated with moisture).
Why is it that cold air removes mist on the car windscreen? Cold condense vapor, doesn't it? Draught over cause evaporation but using hot air does do the job as good as putting on the air conditioning.
The amount of moisture air can hold depends on temperature. Warmer air can hold more moisture than cool air.When warm humid air is passed across the condenser of the AC unit in a car, moisture condenses out of the air. When the now chilled air exits the vent, it becomes warmer as it picks up heat from the the surrounding environment and can now hold more moisture. This evaporates the moisture on the windshield.Heating the air does the same thing in reverse. When humid air is heated, it also is now able to hold more moisture and evaporates the moisture on the windscreen.So you can remove the fog from a windscreen both ways, heating the air to make it dryer or chilling the air before it reaches the windscreen which also drys the air is it warms on the way to the windshield.But ask yourself this. Which would you rather do on a hot muggy day, blow hot dry air into your car to defog the windshield or blow cool dry air to do the same thing?There are also times where it is cold and muggy. I’ve seen conditions where turning on the heat to defog the windscreen did nothing. In these situations, turning on the AC dehumidifies the air first, while also turning up the temperature controls further dries the air by heating it.
If heating makes things dry faster, do clothes washed in warm water dry even more quickly?
Since no one asked their mom, I will go ahead and answer. If you wash and rinse/spin in hot water (like hotttest setting) then immediately pull the item out & hang it up, it will most certainly dry faster than its twin washed the same way, but in cold.The difference will be waaay more apparent in lightweight items such as scarves, ladies undies, dish towels and plain cotton t-shirts.As items get heavier/more complex there's a point of diminishing returns. While the evaporation process STARTS sooner on the item washed in hot, getting to a place of “fully dry” on a heavier, more complex item (like heavy denim coveralls with lots of pockets or a coat) by hanging takes a really long time. Water stays condensed in areas where airflow is limited (like pockets, pleats, etc) so there may not be an appreciable difference between the two.So there ya go.Now go hug your mom (grandma, whoever) for knowing stuff you don't. Be well!A&A
How do you treat a First-degree or Second-degree BURN? ?
A few hours ago I burned myself. I reached my hand over a streaming tea-kettle, and burned my arm near the wrist on the steam. It's red, but no blisters, at least not yet. The burn is about the size of a hard ball, (baseball). I don't think that it's bad enough to go to the doctor, but want to treat it with something so I don't get celutitus, or any complications. How do I treat the burn?