字幕列表 影片播放 列印英文字幕 It's AumSum Time Hey guys. Hold on. Did you download my app from Google Play Store? Remember, it's called ''It's AumSum Time''. Now, let's guess the title of my next video. Because it likes to sizzle. And 100 degrees Celsius. Get ready water droplets. Hurry up. Write your guess in the comments section below. Why are eggs egg-shaped? Because they can't be AumSum-Shaped. Tapered end means greater surface area to the bird's muscles. That helps them to squeeze the egg out easily. You guys look so cozy and warm. This asymmetric shape fits the eggs tightly together. What if the egg is nudged by mistake? Let's see what happens. Rolling Time. Egg is rolling in a circle. But, it stays safe. Spherical Ball is rolling straight. And there it goes. That's why eggs are egg-shaped. Topic: Osmosis. Why is grass killed if salt is sprinkled on it? Hey. What are you doing? Don't eat the grass. Fine. As always, ignore me. See, I warned you earlier. Hey wait. You are making it worse. Don't do that. Look. You spoiled it totally. Alright. Don't cry. I will tell you why this happened. This happened because of a concept called osmosis. Osmosis is the diffusion or movement of water molecules. From a region of higher concentration of water through a semipermeable membrane. To a region of lower concentration of water. Do you think osmosis took place when we sprinkled salt on the grass? Bingo. You are right. Normally, osmosis does not take place on a day to day basis. Because the grass tries to keep the concentration of water same inside Outside its cells through the process of transpiration. However, when we sprinkled salt on the grass. The concentration of salt outside the grass increased and the concentration of water decreased. As a result, the water present inside the plant started flowing outside due to osmosis. Since most of the water flowed out, the grass drooped down and eventually, it died. Topic: Human hair. Why do we get white hair? Because we cannot get blue hair. No. Our hair is basically made up of keratin, a colorless protein. Hence, before our hair comes out of the skin, it is almost white. How's that possible? I had black hair during childhood. Don't worry. I'll explain!! Our hair grows from hair follicles. A hair follicle contains melanocytes which produce melanin. Melanin is injected in the keratin cells during the growth of our hair. This melanin gives color to our hair. Now, the color of our hair is dependent on the type of melanin injected. Eumelanin makes our hair black or brown while pheomelanin makes our hair red or blond. However, as we grow old, the melanocytes decrease the production of melanin. Thus, less melanin is injected in hair, causing them to eventually turn white. Why pop rocks pop? Because they have springs in their legs. No. Pop rocks are tiny candy crystals. Candies are usually made using sugar, water, corn syrup, various flavorings, etc. Initially, all these ingredients are mixed together. The resulting solution is heated until most of the water boils off. We are left with a thick sticky syrup. Usually, this syrup is poured in moulds and allowed to cool and harden to make candies. However, to make pop rocks, highly pressurized carbon dioxide gas is added to the syrup. Then, it is cooled to subsequently form a hard candy. This results in the formation of small bubbles of pressurized carbon dioxide trapped inside the candy. Now, when we put this candy in our mouth, our saliva dissolves the candy. As a result, the highly pressurized carbon dioxide escapes from the bubbles with a pop. Why are some people always cold? We human beings generate heat in our body during muscle movement, metabolism, etc. Most of this heat is used to maintain our body temperature and keep us warm. However, some people always feel cold. This might be because they are suffering from hyperthyroidism. In hyperthyroidism, our thyroid gland which regulates metabolism does not function properly. As a result, our metabolism slows down and less heat is generated due to which we feel cold. Another possibility is a disorder called Raynaud's disease. When a person having this disorder is stressed or is exposed to cold conditions. The arteries of his hands and legs become narrow. Hence, warm blood is not transported efficiently to his hands and legs, making his extremities feel cold. In addition to this, less muscle mass, low iron levels. Smoking may also make some people always feel cold.