Category Science

Which are the inventions we see at home?

Every day we use things that make our lives easier. We flip a switch to turn on the lights. We turn on the tap and fill a glass with water. Our clothes have zippers and snaps that make getting dressed easier. We have alarm clocks to wake us.

What would life be like without lamps or zippers? How would you clean your teeth without a toothbrush or dental floss? Our homes are filled with all sorts of helpful inventions.

The refrigerator allows the modern household to keep food fresh for longer than before. Freezers allow people to freeze food and extend its expiry date for even longer periods.

A washing machine is a machine that uses water to wash laundry, such as clothing and sheets. Bendix Corporation introduced the first domestic automatic washing machine in 1937. Imagine this; this very common household appliance was not available prior to that date!

A television set, more commonly called TV, is a device used for the purpose of viewing television broadcast. It was introduced in 1920 in mechanical form.

However, the modern color television was not introduced until 1940.

The Television has become commonplace in our homes, offices, and institutions, particularly as a prime source for advertising, entertainment, and news.

 

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Which are the some of the craziest robots?

Today, the kinds of robots that are designed and made available to the public are nothing short of amazing. Listed here are some of the craziest robots made and what they are capable of doing.

Tag-along suitcase bot

Any time you travel, one of the biggest hassles is pulling along or carrying your suitcases and luggage while weaving past crowds without going crazy. You wish you could have your own pet mule, but that’s nearly impossible…or is it? Gita cargo both works the seemingly impossible by being a large suitcase that can lug around your items and follow you along while you walk ahead like a boss. Now that’s a suitcase no one would mind owning!

A friend for everyone

For young kids and old adults without companions, Zenbo might be able to offer the right company Looking like a vacuum cleaner with a digital face capable of displaying emotions, this robot whizzes around taking commands, singing songs, playing games, dance and generally always be cute and at your disposal without a frown.

A cute, furry cure

You’ve probably heard that animals like dogs and cats are ideal as therapy for sick But a dog might bite accidentally or a cat might scratch, and there is that problem with them shedding fur. The solution? In Japan, patients get to pet and interact with a cute, furry robotic seal PARO. With touch-sensitive fur and whiskers, it’ll let you pet and cuddle, without expecting any care from you.

100% winner

What makes rock-paper-scissors fun is the fact that it is a totally random and unpredictable way to pass time! Enter Janken, a robot that takes the game a bit too seriously. So seriously, in fact, that it has a 100 per cent winning rate. How on earth does it do that? Equipped with a high-speed camera and hand shape recognition, it can apparently guess what shape you’re going to make so quickly that you’ll never know. Cheater!

ATLAS to the rescue

ATLAS is among the many humanoid robots in the make that is capable of performing different tasks. Unlike many robots that can move well only on smooth floors, ATLAS can power its 6-foot frame through forest paths or even snow. That’s not all – it can open doors, climb ladders, use tools, turn on or turn off valves and probably other tasks. In the future, be prepared to not be shocked by seeing one or ATLAS humanoids rushing past you to tackle emergencies.

What a help!

Finally, a robot we’d rush to buy if only they became available to the public! FoldiMate Inc. is designed to tackle the most annoying among all household chores and the one that Mom assigns to you most often folding clothes. Think of merely feeding one piece of cloth after another on top of FoldiMate and the good robot dutifully deposits them into a bin, ready for you to use!

A robotic smartphone

One day, our boring old rectangular smartphones will be replaced by miniature robot-shaped phones that will do much more. RoBoHoN is one such robot in the making. How can it be better than your faithful smartphone that you own? For instance, you probably go hunting for your smartphone if you keep it somewhere, but ROBOHON is capable of moving in search of you. How awesome is that?

 

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Why can’t you take Coca-Cola into space?

We have tested Coca-Cola (and Pepsi) in space. In 1985, we flew special dispensers from the manufacturers as an experiment aboard the Space Shuttle.

Soda in space is a bit problematic. In micro-gravity, the light gas bubbles won’t rush to the top of the liquid and escape. They will stay within the liquid. This means the astronaut will consume significantly more gas drinking a soda in space than one would drinking a soda on the ground. Drinking a carbonated beverage could be like drinking a foamy slurp.

That means there will be more of a need to burp, to release that gas. That would be okay, except burping in space is unpleasant, for the same reason mentioned above for the soda. On the ground, gases and liquids naturally separate in the digestive system because the lighter gases rise above the heavier liquids. But, in micro-gravity, that doesn’t happen. When one burps in space, it is often a “wet burp” which means some liquid is expelled. It’s kind of like acid reflux.

 

Credit : Quora

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What will happen if an astronaut fires a gun from the Moon aiming at Earth?

The .220 Swift remains the fastest commercial cartridge in the world, with a published velocity of 4,665 ft/s (1,422 m/s) and the escape velocity of the MOON is 2,400 m/s so the bullet will not leave the vicinity of the Moon and will eventually return to the surface.

And to respond to the dozen’s of people who have commented below that a rifle bullet will not work in space or on the Moon , yes it will , and actually , like a rocket it will work marginally better . A bullet carries it’s own oxygen in it’s propellant powder and does not need air to ignite !

The only ballistic (Non missile) round that would leave the moon would be one coming from a rail gun which can reach a velocity of upwards 5–6000 m/s (21,600 km hr).

If aimed very accurately which would be very difficult to do it could enter the earth’s atmosphere at a speed in excess of 40,000 km/h or 11,100 m/s .

As the projectile enters the Earth’s atmosphere it will compress the air ahead of it to a temperature of 8000–10,000ºC and melt and burn up , not striking the ground but vaporizing 15 -20 kilometers above ground maybe terminating in a loud explosion.

 

Credit : Quora

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How do space telescopes keep their lenses clean?

They don’t get dirty.

There is nothing in the vacuum of space to collect on the mirror.

Orbital debris is a potential problem, but experience with Hubble shows that it’s not too serious. But if the mirror does get hit, it’s not something you’ll be able to clean off…it’ll be a hole the size of a quarter.

Hubble’s biggest problems with debris has been impacts to its solar panels:

But Hubble is in a moderately low orbit – because that’s as high as the crappy Space Shuttle could get it.

These days, we’d put it MUCH farther from the Earth—far from the places where debris is common.

The James Webb Space telescope isn’t even going to be orbiting the Earth—it’s going to be parked in a Sun-centered orbit at the Earth/Sun L2 point.

 

Credit : Quora

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If an astronaut fell over a 300 ft cliff on The Moon, would the low gravity save him, and would he bounce?

It’s not the fall that kills you, it’s the sudden stop at the bottom.

Bouncing doesn’t come into it. The question is, how fast are you going when you hit something. The faster you are going, the more energy you contain when you hit the ground—energy that now tries to break bones and crush organs like tomatoes on the windscreen of a passing car.

On Earth, the general rule of thumb is that you risk serious injury from any fall higher than you are. On the moon that would have to be adjusted; lunar gravity is only 1/6th as strong, but there is no air—so you will never reach a “terminal velocity” beyond which you don’t speed up any further.

If an astronaut fell 300 feet on the moon, that’s a 91.44 meter drop at 1.633 meters per second per second acceleration (we’ll do this in metric because metric isn’t a stupid, byzantine measuring system). With no air resistance at all, our hapless astronaut will hit the ground after 10.6 seconds, at a velocity of 17.2 meters per second.

How dangerous is that? Well on Earth, to hit the ground at 17.2 meters per second (ignoring air resistance), you’d have to fall from a height of 15.2 meters, or 49.8 feet, or the roof of a five story building. Onto rock or dry sand. Does that sound like a good idea?

No. Such a drop would likely break the spacesuit and would certainly break the occupant.

 

Credit : Quora

Picture Credit : Google