3-D PRINTER-
It sounds like something out of Tony Stark's Lab (Iron Man's lab): a machine that creates real-life objects just like a regular printer duplicates pictures and documents from your computer. But 3d printers are real, and people use them to whip us everything from simple toys like chess pieces and rubber duckies to prototypes of complex inventions. Load the printer with a sort of plastic "ink" and select the object you wish to print from a "Thingiverse" of thousands of doodads (or design your own object). Then hit the print button. Hot-ink guns on robotic arms move within the machine to "print" the object, layer by layer, until it's complete. Eventually, 3-d printers will evolve to create more complex goodies, including snacks! The first 3-d printer was invented by Chuck Hull.
AIR CONDITIONERS-
The same your refrigerator chills your soda. Both your fridge and your house's A/C absorb heat into coils filled with special refrigerant chemicals. The coils remove the heat from the house (or fridge), leaving the air inside comfortably chilly. Air conditioning in your home can help reduce the possibility of suffering an asthma attack. Typically, when we air condition our homes, we keep the windows and homes of our homes closed. Thus the home is more secured. It also becomes a cool place to exercise. Air conditioning filters are more effective in keeping bugs out than an open window. This not only protects you but keeps your house clean. Even air conditioners prevent overheating of electronics. The first air conditioner was invented by Willis Carrier.
MICROWAVE-
Introduced in the late 1960s as a faster way to fix supper, microwave ovens use a special frequency of radio waves- called microwaves- that causes the atoms in liquids and fats to vibrate. That vibration creates heat and cooks food much faster than a conventional oven. When heated, some nutrients in the food will break down, regardless of whether it is cooled on a stove or in an oven. Food is cooked for the shortest period of time and uses as little liquid as possible, which will best retain nutrients. A microwave can accomplish this, as it is a faster method of cooking. Microwaving can also reduce the bacterial content of food, which can be a useful method of pasteurization and food safety. for example-microwaving red cabbage is superior to steaming for protecting anthocyanin but worse when trying to protect vitamin c. Vegetables are particularly suited for microwave cooking, as they are high in water content and cook quickly without requiring extra water. Microwaves have no non-thermal effect on food. Plastic foods containers that are microwaved may leach toxic chemicals into food and should thus be avoided-use glass instead. Plants given microwaved water shows a negative impact. The first microwave was invented by Percy Spencer & Robert N. Hall.
TOUCH SCREENS-
A touch-sensing interface is one of the reasons your tablet or smartphone is so smart. All touch screens generate an electrical field over the screen(although the technology used t generate the field varies by device). Your finger disrupts the field when you touch th screen, which reads this location and tells the device's operating system precisely where you touched or swiped. It was invented by EA Johnson.
BOOMERANG-
Boomerang was first discovered in Poland. These are uncanny flying objects- which have been wielded as hunting weapons for thousands of years - always return to their tosser (as long as they are thrown correctly). The secret of the boomerang's round-trip flight lies in its shape. A curved design combines two wings joined in the middle. Once the boomerang wielder launches the weapon using a strong overhand toss (similar to chucking a baseball), the boomerang spins through space. Air passes over one wing faster than the other, creating a curved flight path that brings the boomerang back to its point of origin. The Guinness World Record for the longest boomerang throw is a staggering 1,402 feet (427m)! It was a one-way trip; the boomerang got stuck in a tree. If it is thrown in space, it will return to hand just like it would if you threw it on Earth.
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