Sciencedoze: Science, Education and Technology

There is a salt and ice challenge for you. Take one teaspoon of salt and one ice cube in your hand and hold it for just 2 minutes. You can't because your skin will burn like hell like someone sprayed acid on your hand. What causes your hand to burn?? Let's find out!! Disclaimer-⚠️ Don't try this at home ⚠️ What causes your skin to burn? It's because of salt . Salt decreases the freezing point of ice. Normal ice freezes at 0°C but after adding salt its freezing point drops down  to -21°C. Your hand's heat can easily melt the normal ice but It could not melt the ice with -21°C temperature causing a burning sensation to your hand. If you put ice and salt for a long time then it can  also cause frostbite which is very  lethal. How can it affect your skin? We can suffer from frostbite which is not good. Frostbite freezes your skin tissues, reducing the blood flow and oxygen due to which your skin becomes pale, lost of sensation, black or

Did you ever feel a burning sensation in your stomach or the chest? If yes then let's read about acidity...   What is acidity? An acid called stomach acid mainly consists of Hydrochloric acid ( HCl) which helps to digest food like burger, fruits, rice , etc. So when this Hydrochloric acid gets produced in excess amount then it causes acidity . This Hydrochloric acid can reach up to your throat and can cause problems like heartburn ( a burning sensation in chest), acidity, and tons of stomach problems. The pH of Hydrochloric acid can range between 2-3 making it very strong acid which can even dissolve a razor blade. So here a question arises that how can we reduce its amount and maintain the pH of our stomach. How can we cure acidity? By taking an antacid we can cure the acidity. Let's understand a simple chemical equation ACID + BASE---------> SALT + WATER (HCl) + (Antacid) This above reaction is called a neutralization reac

When you are traveling on a plane and suddenly lightning hits the plane. What will happen to you? Does your plane will dance or get crashed straight into the ground. Let's find... Lightning To find out the actual reason let's understand what is lighting... Lightning contains millions of volts of current that can reach up to 1 billion volts . When it falls then it is more heater than the surface of the sun. So how planes can easily escape from that deadliest strike. How plane escapes from lightning? The outer body of the plane is made up of aluminum which is a good conductor of current. So when lightning strikes on the plane, the high voltage current just passes through the outer body of the plane without entering the plane and finally get eliminated through the tail in the atmosphere. In very rare cases planes may catch fire. The last accident by lightning was reported in 1967 when the fuel tanks of the plane were burst by lightning kill

Whenever you feel cold I will suggest you take 2 thin blankets instead of 1 thick blanket. But why?? Because 2 chocolates are always better than one, just joking:-):-) To understand this we first need to know about bad conductors of heat.                                          Image source-  Aumsum Time Bad conductors of heat Any object which resists the heat is called a bad conductor of heat. Air, wood , glass , etc all are said to be bad conductors of heat because they do not allow heat to pass through them. Why this happens? In a thick blanket, heat can easily escape through it not providing better warmness but when you take two blanket s, air gets trapped between the layers of two blankets ,and acts as a bad conductor of heat and does not allow it to escape.  If you sleep with more than 2 blankets then it would be best but you will die under their weight:-):-) If you like this post then do  share with your friends. You can also foll

I am sure that once in your lifetime you have seen some insects walking on water without any issues but did you question yourself how did this happen? So you are in the right place keep scrolling!!   The actual reason In one word you can say it's due to surface tension . What's that? If you are a science student then you know that molecules of water attract each other from all directions but the molecules present in the topmost layer are not attracted equally in all directions because there are no molecules present above it. So this topmost layer experiences a force of attraction in the downward direction behaving like a spring. Insects have very very less weight. So when they walk on water their legs presses the water molecules and as result water molecules push them back creating a floating like condition. Moreover , their legs are also widely spread causing the equal distribution of the weight of insects on the water. Why humans can

Finally answered!   As biology states that reproduction causes the birth of new offspring with some minor genetic changes. On this basis, scientists proposed a theory called proto chicken or proto egg theory. What is the proto chicken theory? At the time of dinosaurs, they give birth to an egg which gives baby dinosaur with minor genetic changes (some different traits from parents). So in the future, this baby dinosaur also gives birth to another dinosaur with some genital changes and this cycle goes on. So scientists believed that after 10000 years new species of dinosaurs took birth which is different from the previous one and looks like a chicken called proto chicken and it gives birth to another egg called proto egg which gives pure chicken which we see today. Here arise two cases:- When we take proto chicken gave birth proto egg then we can say chicken came first. When we take proto egg gave birth to pure chicken then we can say egg came first.

If you are flying in an airplane and suddenly both the engines get failed then what will you do?? Count to death or you could jump from the plane. Let's find out... At 30000 feet When you jump from the plane then your height will be around 30000 feet. When you jump from this height then your speed will reach up to 173 feet per second which will take exactly 3 minutes you to collapse with the ground. Firstly you will start choking as there is a very thin layer of oxygen and you will not get a healthy amount of oxygen to breathe . You will suffer from hypoxia and you will start losing your consciousness. Your face will become dead and pale. At 20000 feet If all other passengers also jump along with their heavy luggage then you will notice this luggage falling along with you. You can gather each item like suitcase, bag , fellow passenger ,and form a round puff around you to save yourself from collapsing with the ground. At 10000 feet You are just about

Do you ever think why your teeth become yellow over time or your teeth are yellow by birth?? Both have respective reasons let's checkout.   Structure of Teeth   Before going through the reason first let us understand the structure of teeth, it's very  simple The topmost layer is called enamel which is  white . The second layer is dentine which is  yellow . Third and the last layer is the pulp which contains blood vessels and veins which is  red . Why our teeth turn yellow? So what exactly happens when we eat food which is either  acidic or basic like lemon juice, cold drinks, chewing gum, etc then it erodes our topmost i.e enamel from teeth and over some time our enamel gets fully eroded and the second layer i.e dentine is now visible which is  yellow . That's how our teeth turn yellow. Why some people have yellow teeth by birth?? Some people have their teeth yellow by birth because their topmost enamel layer is very thin and th