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 attract a piece of iron attached to a clapper. The clapper hits the bell and makes it ring.
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
What is Haptic Technology? Haptic Technology or haptics, is a tactile feedback technology which takes advantage of the sense of touch by applying forces, vibrations, or motions to the user. Haptic refers
What is the World’s most littered Plastic item? Smokers around the world buy roughly 6.5 trillion cigarettes every year . That’s 18 billion every day. While most of a cigarette’s innards
*How can you tell if a Mushroom is poisonous? Many types of Mushrooms are good to eat. The Fruiting bodies of other fungi like Truffles and Puffballs are also tasty.
Why do Bags of Chips have Air in them? Potato Chip Bags are not full of Air, but of Nitrogen gas. This is done to prevent the Chips from oxidizing, which
Why do Mosquito bites itch? While bees and wasps inject venom when they sting, mosquitoes simply bite to feed on your blood. The bumps and itchiness that follow come from an
What are virtual SIM cards and what do they do? Unlike a SIM card, virtual SIMs are not attached to a mobile. They are created online to help you communicate. It is
What makes a Fabric Waterproof? One type of Waterproof Fabric is waterproof simply because the Threads are woven so tightly that water cannot easily get inside or through. Other Waterproof materials
Does the Moon really have Volcanoes? Yes, the Moon has some Volcanoes, but scientists classify them as Dead Volcanoes because they have not erupted for millions, perhaps billions,
What is Seamount? A Seamount is a mountain rising from the ocean seafloor that does not reach to the water's surface (sea level), and thus is not an island, islet or cliff-rock. Seamounts are typically formed from extinct volcanoes that rise abruptly and are
