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  • It's AumSum Time

  • Hey guys.

  • Hold on.

  • Now, let's guess the title of my next video.

  • Now, check this guy.

  • He ain't no normal cloud.

  • He's big and thick.

  • Mr. Raincloud.

  • Hurry up.

  • Wirte your guess in the comments section below.

  • Can dogs detect cancer?

  • Yeah.

  • He's a super dog.

  • Dogs' noses have more than 200 million sense receptors.

  • So, they have an extraordinary smelling ability.

  • They also have an organ behind their nose called Jacobson's organ.

  • It enhances their sniffing power.

  • Now, cancer cells emit volatile organic compounds.

  • They have a unique odor.

  • By training their super sensitive noses, dogs can recognize cancerous odors.

  • How?

  • By sniffing the patient's breath or urine.

  • Topic: Acid-Base Indicators.

  • Why does a turmeric stain turn red?

  • Oh no.

  • You got a stain on the shirt.

  • I know what you are thinking.

  • No, there is no point.

  • None of the 2 bottles are of any use.

  • Listen to me.

  • Don't wash the stain with the soapy solution.

  • The stain will turn red.

  • See, I told you.

  • Do you know why this happened?

  • This happened because the food which fell on the cloth had turmeric in it.

  • The color of turmeric is yellow.

  • It is a natural indicator which tells us whether a substance is an acid or a base.

  • Now, let us get back to those two bottles.

  • One contained lemon juice while one contained a soapy solution.

  • When we pour the lemon juice on the turmeric powder.

  • We see that the color of turmeric powder is still yellow.

  • This is because lemon juice is an acid.

  • Turmeric does not change its color when it comes in contact with an acid.

  • Indicating that the lemon juice is an acid.

  • However, when we pour the soapy solution on the turmeric powder.

  • We see that the color of turmeric powder turns red.

  • This is because soap is a base.

  • When turmeric comes in contact with a base, it changes its color from yellow to red.

  • Indicating that the soapy solution is a base.

  • That is why a turmeric stain turns red when it comes in contact with any kind of base.

  • Topic: Human tongue.

  • Why does our tongue stick to a frozen pole?

  • Maybe our tongue has a magnet in it.

  • No.

  • Our tongue is always covered with saliva which is about 99% water.

  • During cold weather, heat from our warm blood is regularly supplied to our tongue.

  • Preventing the saliva from freezing.

  • Now, a metal pole is a very good conductor of heat, that is, it conducts heat very easily.

  • It's so kind-hearted.

  • Just listen.

  • During cold weather, the metal pole becomes frozen and does not have heat in it.

  • Hence, when we keep our warm tongue on the frozen pole.

  • It draws heat from our tongue faster than the blood can replenish it.

  • Due to lack of heat, the saliva freezes and forms ice, causing the tongue to stick to the frozen pole.

  • Why don't spiders stick to their webs?

  • I don't know.

  • Usually, a spider's web is made up of silk threads which are covered with droplets of glue.

  • This glue makes the threads sticky.

  • Now, when an insect flies through the web, the insect normally gets stuck to the sticky threads.

  • But, a spider does not get stuck because its legs have tiny hair like structures called setae.

  • When a spider walks on a sticky thread, the setae gets stuck onto the thread.

  • Helping the spider to get grip and support to walk.

  • Now as the point of contact is very less, the glue has very less surface area to stick.

  • Hence, the spider easily pulls its legs without sticking.

  • Besides this, a research suggests that certain spider's legs are covered with a special chemical coating.

  • This coating also helps the legs from sticking to the glue.

  • Why does salt make food taste better?

  • Wait.

  • I'll explain.

  • Salt which is basically sodium chloride makes almost everything taste better.

  • Whether it is French fries, certain fruits, curries or even cookies.

  • We like at least a little salt in all these foods.

  • According to researchers.

  • We have evolved to like salt maybe because our bodies need salt for survival.

  • What?

  • Salt for survival.

  • Indeed.

  • Sodium present in salt, maintains our blood pressure, transmits nerve impulses, etc.

  • Whereas, chloride is used to produce hydrochloric acid in our stomach.

  • Hence, to obtain salt, we have gradually developed a taste for it.

  • Thus, salt in food makes it appealing and tasty.

  • In addition to this, it is found that salt suppresses bitterness better than sugar.

  • Researchers aren't sure how.

  • Some researchers suggest that salt neutralizes the bitter tongue receptors.

  • While some suggest that on adding salt, the brain interprets the taste as less bitter.

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狗狗可以檢測出癌症嗎?| 癌症 (Can Dogs detect Cancer? | #aumsum)

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    Amy.Lin 發佈於 2021 年 01 月 14 日
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