What is Cabin Pressure and Why do we need to maintain it in Aeroplane ?
Earth's atmospheric pressure varies with altitude. At the Earth's surface(sea level) , It is measured at 14.7 pounds per square inch(P.S.I) - which human beings are accustomed to because it provides the optimum amount of Oxygen.
As Aeroplane ascends to higher altitudes, the atmospheric pressure decreases. There isn't oxygen to breathe and humans cannot survive more than a minute at such altitudes.In order to prevent this from happening , Cabin Pressure is maintained at appropriate levels.
How does E.C.G. Machine work ? E.C.G stands for Electrocardiogram. An Electrocardiogram is a simple, painless test that measures your heart's electrical activity. It's also known as an ECG or EKG.
What do the Letters mean when describing a Car? DX - Deluxe. LX - Luxury. EX - Extra (sometimes seen as EX-L, "Extra Luxury", often top tier). S - Sport. SS - Super Sport. GT -
Why are the Ventilators kept at the top of the Roof? Ventilators are provided in the rooms just below the roofs because when the air inside the room gets hot this
How do Electric Eels hunt? An Electric Eel is a formidable freshwater Predator with the ability to emit a powerful voltage of Electricity underwater to immobilise passing prey. Releasing pulses of
How is Hair produced and How does it grow ? Hair is made of a tough protein called Keratin. First, your hair grows from Follicles within the skin. The part of
What makes Hot Peppers Hot? It is an irritant for Mammals, including Humans, and produces a sensation of burning in any tissue with which it comes into contact. Capsaicin and several
How We detect different Tastes? If you touch your tongue, you'll notice that it's covered with bumps and mini-ridges. Each of these bumps is made up of taste buds, which in
What is Dandruff ? Dandruff, those dry, white flakes of Skin you brush off your Collar or Shoulders is harmless. But it can be embarrassing and itchy. Dandruff really isn't
How does an Electric Bell work? Electric bell contains an electromagnet, consisting of coils of insulated wire wound round iron rods. When an electric current flows through the coils, the rods become magnetic and
How Glider works? The wings on a glider have to produce enough lift to balance the weight of the glider. The faster the glider goes the more lift the wings make.
What causes skin to wrinkle with age? The skin is made up of three layers: The outermost layer which everyone can see, called the Epidermis. The middle layer, called the Dermis. The innermost layer, called
What is the meaning of Seven Spikes on Statue of Liberty? It is just over 305 feet tall from the ground to the top of the torch flame. The crown has
What Is the Purpose of the “Do Not Cover This Hole” Hole on Hard Drives? Hard disk drives require a certain range of air pressures in order to operate properly. The
Why there is a Hole in Lollipop stick? It's because if you simply place the candy on top of the stick, the extremely low amount of friction between the stick and
How is Glass made? Believe it or not, Glass is made from liquid sand. You can make glass by heating ordinary sand (which is mostly made of silicon dioxide) until it
What are Micronutrients? Micronutrients are nutrients required throughout life in small quantities for a wide range of physiological functions enabling the body to produce Enzymes, Hormones and other substances essential
What is the difference between White and Brown Eggs? The difference is all about the chicken. White and brown eggs have no nutritional difference; however, they do have a noticeable price variance
Why can we see our breath when it’s cold outdoors? Sometimes when you breathe outside in cold weather, you can make your own cloud! As the water vapor in your
What is an Estuary? Estuaries are places where freshwater Streams and Rivers meet the sea. The salinity of such areas is less than that of the open Ocean but greater than
*What are main compositions of Semen? Semen, also called seminal fluid, fluid that is emitted from the male reproductive tract and that contains sperm cells, which are capable of fertilizing the female eggs. Semen also contains
