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Why does the liquid that is put on your arm before an injection feel cold?
Wiki User
∙ 12y ago
The liquid they put on your arm is rubbing, or isopropyl alcohol. They do this to sterilize your skin so that when they inject you the needle doesn't push any dirt or bacteria that may have been hanging out on the surface into your arm. The reason it feels cold is because isopropyl alcohol evaporates extremely fast because of its high vapor pressure and evaporation is a process that requires energy which causes a cooling sensation on your skin. Its the same reason sweat or water cool you off.
Wiki User
∙ 12y ago
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How is your body cold when you perspire?
When you perspire, liquid (perspiration or sweat) is secreted from your skin. When it evaporates into the air it carries small amounts of body heat with it making the body feel cooler.
What are eight liquid substances that you can see or feel?
MilkTearsBeerMercuryWaterUrineBloodChicken soup
What does an endothermic reaction feel like?
It feels cold.
Why does your body feel cold when you are in an air-conditional room?
The sweat is evaporating. Evaporation requires energy - heat. That energy is removed from the surface of your skin, and you feel the loss of energy as cold.
If the temperature is low?
If the temperature is low , the air will feel cold.
What is felt after applying spirit before injection?
The skin is cleaned with spirit before injection. It may just feel a bit cold
What are the ingredients of Epoetin Alfa Injection?
why do i feel so tired on the injection is it normal.
How cold is liquid nitrogen when freezing warts?
-320.2 DEGREES F but you wont feel it as long as it is applied properly.
Why does a few drops of ethanol poured on your arm feel very cold?
Ethanol is an alcohol-based liquid. Alcohols evaporate when warmed - the heat from your arm causes the ethanol to evaporate - taking the heat from your arm as it does, which makes your skin feel cold.
How do you feel before you faint?
you start cold sweating you become very pale you feel extremely tired you cant think straight sometimes you feel shakey
Why does the room get colder before hotter?
A room doesnt get colder before putting on a heater or something. This may feel like it because your body will feel the warm of the heat, also it will feel the cold air. This will make you feel more colder.
Will a dog feel a injection?
Yes, just like humans, dogs will feel injections.
Why do you feel cold after coming out of the shower?
If you use tapwater, you may feel cold but if you use a heater, you wont feel cold.
Why would someone feel cold after that person was out of the water and even colder in the breeze?
The process of evaporation consumes heat, which is drawn into the evaporating liquid from its surroundings.
What does it mean if my throat and stomach feel cold but I ain't cold?
It usually happens just before death, better eat something hot straight away.
Is it good if a human can't feel the cold?
It's bad if you can't feel cold because your body is supposed to be hot or cold. If you can't feel cold, see a doctor.
Do children have the Injection to take your teeth out?
do you mean the injection to numb your mouth so you don't feel it? then yes, unless you don't want it.
