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Evaporation of water is a process with heat absorption.
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Why does the air from a fan's jet stream feel cooler than the surrounding environmental temperature?
Temperature is the same, but the stream of air takes more moisture off your skin then steady air. While doing that it effectively cools more your skin. As result you feel it as "cooler" air.
What happens if a cold egg is brought into hot water?
Basically, the egg gets warmer as the water gets cooler until both meet at the same temperature.
Why the brass need to be immersed in the boiling water before place it in the calorimeter?
The brass needs to be immersed in the boiling water for a sufficient enough time that its temperature is the same as the boiling water, 100 degrees Celsius. That will be the initial temperature of the brass. After it is quickly placed in the calorimeter which will contain much cooler water, causing the brass to cool down and the water to heat up until the point where the temperature no longer changes. At that point the temperature of the brass is the same temperature as the water in the calorimeter, which is its final temperature of the brass.
Why Is ice water cooler than ice?
"Ice water" could either refer to water that has been chilled to the freezing temperature or just a container of water with ice floating in that is close to (but still above) that freezing temperature. Ice can be no warmer than the freezing point but can certainly be colder. If the solid (ice) is in equilibrium with the liquid ("ice water"), the ice will NOT be cooler, but as noted, if they are not really in equilibrium, you would expect the solid (ice) to be colder than the liquid water rather than the other way around.
How your hands will feel when you place them in the container of room temperature water?
Body temperature is regulated by an intricate system called homeostasis. If the external (outside) temperature is hotter or colder than our body then various things come into play to maintain our body heat. If you put your hand into room temperature water (room temperature is generally accepted to be 20 degrees C) then it will feel cold, because body temp is about 37 degrees C. The water will absorb heat energy from your hand, making it feel cold, until the temperature of the water and the temperature of your hand are the same. Or until you decide that shoving your hand in cool water is pointless...If you put your hand into water that is at 37 degrees C then you won't notice any temperature difference. It just feels wet. It's really weird, try it!
Which temperature would feel cooler -40 degrees Celsius or -40 degrees Fahrenheit?
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Is ice water cooler than ice?
No, but it can be the same temperature if the water is spinning fast to keep it from freezing
Why does the air from a fan's jet stream feel cooler than the surrounding environmental temperature?
Temperature is the same, but the stream of air takes more moisture off your skin then steady air. While doing that it effectively cools more your skin. As result you feel it as "cooler" air.
21 degrees is warm?
Well, if you have 21 degrees air temperature, it's ok if the water you'll swim in is warmer, but if the water is cooler then it won't feel very comfortable. If you mean 21 degrees water temperature, it's ok to swim if the temperature of the air is warm (otherwise you'll feel cold when you come out). A heated pool's temperature is around 30 degrees, so 21 is not the same, but it's perfectly ok once you go in the water.
Would a glass of ice water nearly full of ice be cooler then a glass of ice water half full of ice?
The temperature will be the same.
How does ice melting keep food cold in a cooler?
Melting ice stays at the same temperature until it is all melted to water.
What happens if a cold egg is brought into hot water?
Basically, the egg gets warmer as the water gets cooler until both meet at the same temperature.
When you put your hands in the water at he room temperature why do you not feel cold?
If the water is room temperature, meaning the same temperature as the air, then you wouldn't feel a change in temperature. On the other hand, If there was a breeze or the air was otherwise in motion, it might increase evaporation of skin moisture and have a cooling effect. In that situation, putting your hands into the water might make them feel warmer.
Why the brass need to be immersed in the boiling water before place it in the calorimeter?
The brass needs to be immersed in the boiling water for a sufficient enough time that its temperature is the same as the boiling water, 100 degrees Celsius. That will be the initial temperature of the brass. After it is quickly placed in the calorimeter which will contain much cooler water, causing the brass to cool down and the water to heat up until the point where the temperature no longer changes. At that point the temperature of the brass is the same temperature as the water in the calorimeter, which is its final temperature of the brass.
Is Hydrogen cooler than Air?
Hydrogen is lighter than air. As to the temperature it depends on where the heat source is, hydrogen can either be warmer, cooler or the same temperature as air
What is a Uniform temperature?
The temperature is the same no matter where you test the sample. There is no region that is hotter or cooler than another.
Does a table have a temperature equal to greater than or less than the temperature of the air?
At equilibrium the table ad air will have the same temperature. Any change in air temperature will change the temperature of the table but the change in table temperature will lag behind the change in air temperature. If you feel a table in a room it may feel cooler than the air temperature as the table material is more conductive of the heat from your skin than the air.
