It sounds like something out of Tony Stark’s (Iron Man’s) lab:. machine that creates real-life objects just like a regular printer duplicates pictures and documents from your computer. But 3-D printers are real, and people use them to whip up everything from simple toys like chess pieces and rubber duckies to prototypes of complex inventions. Simply 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 pri nters will evolve to create more complex goodies, including snacks!
How do air conditioner make my house cold ?
The same way 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.
Why do microwave make my food hot?
Introduced in the late 1960s as a faster way to 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.
How do touch screen work?
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 to generate the field varies by device). Your finger disrupts the field when you touch the screen, which reads this location and tells the device’s Operating system precisely where you touched or swiped.
Why does a boomerang return to its thrower?
These uncanny flying objects-which have been wielded as hunting weapons for thousands of years-always return to their tosser (as long as they’re 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 (427 m)! It was a one-way trip; the boomerang got stuck in a tree.
What if you threw a boomerang in space?
It would return to your hand just like it would if you threw it on Earth-a fact verified by experiments on the International Space Station. It’s the passage of air over a boomerang’s
wings, not the force of gravity, that’s crucial to a boomerang’s return flight.
Why did NASA invent Tang and Velcro?
Although the drink mix Tang and sticky Velcro tape will forever be associated with rockets to the moon and space stations (both Tang and Velcro were shot into space in the early days of the space program), NASA didn’t invent either product. Still, pIenty of other spin-offsor technologies adapted for use here on Earth-came out of NASA-sponsored labs, including.
# MEMORYFOAM: The spongy material in your mattress was originally designed for aircraft seat cushions.
# EAR THERMOMETERS: NASA developed heat sensors that doctors now use to take your temperature without sticking a thermometer under your tongue.
# ARTIFICIAL LIMBS: NASA’s research into robotic astronauts has resulted in more realistic and functional arms and legs for people who have lost theirs in accidents or combat.
# INVISIBLE BRACES: Straightening your pearly whites no longer requires a mouthful of metal, thanks to a tough, transparent plastic originally created for missile systems.
# Somethingspecial÷
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