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  • It's AumSum Time.

  • Can you guess the title of my next video?

  • Hurry up.

  • Write your guess in the comments section below.

  • What is constipation?

  • After much of the digestion and absorption of nutrients.

  • The unwanted food or stool which is in a liquid state flows to the large intestine or colon.

  • Here, by means of a series of muscular contractions and relaxations.

  • The stool is pushed or moved through the colon.

  • As the stool moves, water is absorbed from the stool, making it more solid.

  • Finally, the stool enters the rectum.

  • When the rectum is full and stretched, the nerves of the rectum send signals to the brain.

  • At this point, we decide whether to expel the stool or retain it.

  • Going to the toilet and expelling the waste is a part of our daily routine.

  • However, sometimes due to slow muscle contractions, the stool passes slower than usual through the colon.

  • As a result, excess water is absorbed, making the stool very hard.

  • Such a condition in which an individual has hard stool that is difficult to expel is called constipation.

  • Why does water go stale overnight?

  • Because you left it alone overnight.

  • No.

  • In water purification plants, chlorine is added to water.

  • Chlorine kills microorganisms in water, thus keeping it clean and safe to drink.

  • This chlorine gives our drinking water a slightly different taste.

  • However, if we keep the water open for a long time or overnight, the chlorine will dissipate into air.

  • As a result, the taste of water alters.

  • Also, water is a universal solvent.

  • It can dissolve almost anything.

  • Hence, if we keep water open for quite a long time, the atmospheric carbon dioxide gets dissolved in it.

  • This results in the formation of mild carbonic acid.

  • What?

  • Acid is formed in water?

  • Indeed.

  • However, it is not harmful.

  • But the presence of carbonic acid, slightly lowers the pH of water, making it slightly acidic.

  • Thus, unpleasant to taste.

  • Why do strawberries have seeds on the outside?

  • Because seeds feel hot inside.

  • No.

  • First of all, a fruit is formed from a flower.

  • A flower consists of ovary, ovule, petals, sepals, stamens, etc.

  • Most of these parts are attached to receptacle.

  • Now, usually after fertilization, the ovule forms a seed and the ovary swells to form a fruit.

  • Whereas, the remaining parts of the flower fall off.

  • Now, a strawberry flower has multiple ovaries.

  • When fetilization occurs, all the ovaries form fruits but they don't swell.

  • Instead, the receptacle of the strawberry flower swells to form the red edible part of the strawberry.

  • The tiny fruits get embedded on the surface of the enlarged receptacle.

  • While, the remaining parts fall off.

  • Thus, the seeds on the outside of the strawberry are actually tiny fruits, each of which contains a seed.

  • Why is the ocean blue?

  • Because ocean water reflects blue color of the sky.

  • You are right, but not completely.

  • The main reason for oceans to be blue is the way water molecules absorb and scatter the colors of sunlight.

  • Sunlight has seven visible colors.

  • They are red, orange, yellow, green, blue, indigo and violet.

  • Yes.

  • I saw them in a rainbow.

  • Now, when sunlight falls on the ocean, it passes deep into the water.

  • Here, red, orange, yellow and green colors of sunlight are absorbed more strongly by water molecules.

  • While, blue, indigo and violet colors are not absorbed much.

  • Instead, they are scattered, making the ocean appear blue to us.

  • However, as the blue shades penetrate deeper into the ocean, eventually they also get absorbed.

  • Hence, at greater depths the ocean is completely dark.

  • Topic: Density.

  • Why do firemen crawl in smoke filled rooms?

  • Hey.

  • Remember, the upper part of the room will be filled with smoke.

  • So, crawl while you are going inside.

  • I won't.

  • My legs will become dirty.

  • Why don't you listen?

  • Look.

  • You are not able to breathe properly as you have inhaled a lot of smoke.

  • This happened because you did not care about the density of air.

  • I know all about cavity, but what's this new thing called density?

  • Don't worry.

  • I will explain.

  • Density is the measure of mass present per unit volume.

  • Lesser the density, lighter will be the object and greater the density, heavier will be the object.

  • So in this case, what is lighter, the air or the smoke?

  • Wait.

  • Let me think!!

  • I guess the answer is smoke.

  • Yes, you are absolutely correct.

  • Smoke is lighter than air.

  • As it is lighter, it rises up in the room and occupies the space at the top.

  • Hey.

  • Where are you going?

  • It is not over yet.

  • The air being heavier than smoke tends to remain below.

  • Hence, if we crawl, we will get sufficient oxygen to breathe.

  • We can safely come out of the room without being suffocated.

It's AumSum Time.

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B2 中高級 美國腔

什麼是便祕?| 我的天啊!我的天啊!我的天啊!我的天啊!我的天啊!我的天啊 (What is Constipation? | #aumsum)

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    AumSum 發佈於 2021 年 01 月 14 日
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