Today I Learn

2022-02-16 17:47:52 Why Are Lemons Sour?

If you've ever taken a bite out of alemon, you already know they pack some serious sour power.

This is because they contain citric acid, which is a weak organic acid found in many fruits and vegetables.

True to their name, citrus fruits have particularly high concentrations of citric acid.

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2022-02-14 17:22:06 What body parts of human body can be donated after death?

The entire body can be donated for training or research purposes.

For the purpose of transplantation, the following can be harvested:
Liver ,Kidneys, Pancreas, Heart, Lungs, Eyes, Skin, Bone, Hands, Face .

As our techniques improve, more organs could be brought in to the fold and possibly also stored longer.

PS: one 'organ' we should not forget to donate regularly while we are still alive - blood!

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2022-02-13 10:18:03 Do You Like the Content ?

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2022-02-13 03:42:51 Why does your stomach growl when you are hungry?

This process cleans up any food that was missed earlier.

The stomach muscle contractions also help to make you hungry, so you eat more food that your body needs.

When these muscle contractions get going again and your stomach is empty, those gas and air pockets make a lot more noise that you hear as stomach growling.

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2022-02-12 04:14:26 Why do lakes freeze from the top down rather than the bottom up?

The reason why ice forms on the top of lakes and ponds is that once water cools below 39 degrees Fahrenheit, it becomes lighter and less dense the more it cools.

This means that water expands as it freezes into ice.

As a result, ice takes up more room than the water it was made from.

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2022-02-10 04:52:40 What is the significance of colours and different lines on road ?

WHITE LINES painted on the pavement indicate traffic traveling in your direction.

Broken White Line: you may change lanes if it is safe to do so.

Solid White Line: requires you to stay within the lane and also marks the shoulder of the roadway. 

YELLOW LINES mark the center of a two-wayroad used for two-way traffic.

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2022-02-04 06:33:09 What is distribution of water on earth ?

The oceans are huge. About 70 percent of the planet is covered in ocean, and the average depth of the ocean is several thousand feet (about 1,000 meters).

Ninety-eight percent of the water on the planet is in the oceans, and therefore is unusable for drinking because of the salt.

About 2 percent of the planet's water is fresh, but 1.6 percent of the planet's water is locked up in the polar ice caps and glaciers.

Another 0.36 percent is found underground in aquifers and wells. Only about 0.036 percent of the planet's total water supply is found in lakes and rivers.

That's still thousands of trillions of gallons, but it's a very small amount compared to all the water available.

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2022-02-01 03:57:34 What is Sodium Lamp and how does it work ?

There are two kinds of sodium lights: Low Pressure (LPS) and High Pressure (HPS).

These lamps are mostly used for street lighting as well as industrialuses.

The lamp works by creating an electric arc through vaporized sodium metal.

Other materials and gases are used to help start the lamp or control its color.

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2022-01-31 05:07:29 Why do surgeons wear green or blue clothes ?

Green and blue are colors that are not bright and pleasing to eye.

Also they appear clean when stained with blood.

It began with wearing white scrubs as it was considered a surgeon is more reputed if his scrubs were stained more.

Later as concepts of sepsis and hygiene came along colors changed to green n blue which are neutral to eye and also instil a sense of cleanliness and authority.

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