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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.
What else can I help you with?
Liquid to gas hot or cold?
When a liquid turns into a gas, it absorbs heat from its surroundings, making the surroundings feel cold. This absorption of heat allows the particles in the liquid to gain enough energy to escape into the gas phase.
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.
Why does ice not feel cold when you have cirrhosis?
Cirrhosis can damage nerve endings, which may affect the perception of temperature. This can cause ice not to feel as cold as it normally would.
What are eight liquid substances that you can see or feel?
MilkTearsBeerMercuryWaterUrineBloodChicken soup
What happen if you touch a cold surface?
When you touch a cold surface, heat is transferred from your warm skin to the cooler surface, causing you to feel a sensation of coldness. Your body will also try to regulate its temperature by constricting blood vessels and potentially shivering to generate heat.
What is felt after applying spirit before injection?
The skin is cleaned with spirit before injection. It may just feel a bit cold
Liquid to gas hot or cold?
When a liquid turns into a gas, it absorbs heat from its surroundings, making the surroundings feel cold. This absorption of heat allows the particles in the liquid to gain enough energy to escape into the gas phase.
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.
How cold is 0c?
0°C is the freezing point of water, so it is the temperature at which water transitions from a liquid to a solid state. It is considered quite cold and can feel chilly to most people, especially if there is wind or dampness present.
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.
