Some Nights Intro by fun. on Grooveshark Hi.
Hi.
How does a refrigerator generate cold?
  1. The compressor squeezes the refrigerant (inside coils and tubing) which is in a vapor state - this raises its temperature, then pushes it into the coils on the outside of the refrigerator.

  2. The hot gas in the outside coils cools down to the air temperature of the kitchen.

  3. The refrigerant flows into the coils inside the freezer and the fridge - as it flows, it expands. This pulls heat from the refrigerator interior.

  4. The refrigerant expands, absorbs the heat from inside the fridge, cooling down the air.

  5. It then flows back to the compressor, where the cycle starts all over.

Interesting fact: Refrigerators, freezers and air conditioners actually generates heat, not cold.

A motor is used to MOVE heat from one place to another, plus the motor gets hot while it’s working.

Put a bunch of running freezers in a room, and the room will get hot. Open the freezers, and it will get even hotter.

If this is hard to get your head around, think about this: “Cold” does not actually exist. Heat is energy, cold is simply “less heat”. You cannot create negative energy, you cannot destroy energy. But you can move it.

/u/myplacedk + /u/pdx_stan

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a-minion-has-been-slain:

The champions in piltover by chanseven

Why does smoking hookah make you have to poop?

It’s because the nicotine makes your muscles relax, this includes your bowels. You can guess what that means.

/u/flubbex

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Why is it easier to learn a language as a baby as opposed to a second one later on in life?

There is this period of great linguistic sensitivity known as the critical period for language development that occurs during childhood. During this period we pick up language at a ridiculous rate. This is also a time that correlates with a massive everyday growth in brain cells - so you can imagine our brain capacity is being filled and increasing everyday.

When older brain stops growing The linguistic critical period also comes to an end which makes it difficult to learn new languages.

/u/iamessar

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Why does paper get permanently altered when it gets wet?

It actually isn’t permanently changed. When paper factories make paper, they push unsettled paper through high pressure steam rollers to smooth it out. When you get the paper wet, the paper unsets itself and goes back to its rough original texture. You can push it back through a steam roller to smooth it out again, and that is partly what happens when we recycle paper.

/u/mckoijion

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How does Tylenol and Motrin reduce fever?

Motrin/ibuprofen (and related drugs like Voltaren/diclofenac and Aleve/naproxen) decrease fever by lowering levels of chemicals that tell our brain to raise our body temperature. These chemicals are called prostaglandins and thromboxane.

I’m not sure how acetaminophen does it, but it’s through a different mechanism. It acts on the brain’s temperature control centre and tells it to return temperature to normal.

/u/punderstruck

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How does hair grow AFTER shaving?

Shaving only removes the hair that’s exposed. It does not remove the hair root. Your leg hair will grow back after shaving

When it does grow back, the tip of the hair will be flat. That’s what causes the prickling. Plucked hairs grow back more naturally feel.

/u/krystar78

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Why is everything suddenly Gluten-free?

There is an actual medical condition, Celiac or Coeliac Disease, which is very serious, although fairly rare - only about 1% of people have it. People with that condition really cannot eat gluten because they have a strong immune reaction to it.

Gluten-free products are a blessing to these people, who would otherwise need to monitor their diet very carefully.

But since industry has now created all of these gluten-free products, why not make an extra buck on them by selling to people who don’t really need it? So they created a fad. And that is, most probably, what you are seeing.

/u/wordserious

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Why do people pay so much to wire money with companies like Western Union?

A lot of people use money gram to wire money to their family over seas. It’s a different ball game when you live in a third world country especially where credit cards aren’t widely accepted or taken.

They might need money right away and might not have bank accounts. Right away means keeping the lights on, buying food, paying rent and bail money.

There are much better ways to send money but only if you have the convenience to do so.

/u/blankbox + /u/psilocybes

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think-progress:

Heartbreaking: Two homeless people freeze to death just miles from the White House.

excluhsive:

When my mom gives me the phone to talk to my relatives

image

foodffs:

Maple Oatmeal Princess Coffee Cake
Really nice recipes. Every hour.