Tag: fastest

First Man-made Object in Space – A Manhole Cover?

By Anupum Pant

Edit: The first man-made object to cross the boundary of space (100 km above the sea level, or the karman line) a Nazi German V2 rocket on October 3, 1942. – As mentioned by Scott and Adolf in the comments.

Background

Odd, I know. Teachers would say Sputnik was the first ever man-made object to orbit earth, but there is a slight possibility that Sputnik might not have been it – it could have been a humble manhole cover (not so humble, read on).

Back in the year 1956 (or summer of 1957, but definitely before the launch of Sputnik which happened on 4th October 1957), scientists at Los Alamos were learning to contain a nuclear explosion. To find out, they decided to do a much much larger version of the fire-cracker-in-a-can trick…
I’m not sure if they were doing it out of a desire to loft objects in space using a novel nuclear bomb propulsion, or it was something else, it sure was madness.

The mad experiment

In a 500 feet long and 4 feet wide vertical cylindrical tunnel, they put a nuclear bomb. The top of this tunnel was sealed using a 4 inch thick man hole cover (on steroids). The lid weighed about 2 tons! They were sure that even the 2 ton lid would blow off like feather due to the nuclear explosion. However, they weren’t sure on exactly how fast it’d travel up. To measure the speed, high-speed cameras were placed near the opening.

The bomb was detonated. Some say that the high speed cameras were only able to capture the image of the lid in a single frame. Which by the way could also contribute to an enormous error margin in the speed calculation. Nevertheless, the speed was of the lid at which it flew up in the air was calculated to be 41 miles per second – approximately 6 times the escape velocity! Never before had any man made objects moved at that speed inside the earth’s atmosphere. The lid went. It was never seen again. No one knows where it is now.

It’s highly likely that the lid was burned up and never reached Space. Or, may be it did reach some place and then dropped back. Again, must have got burnt during re-entry. Nothing can be said for sure.

Another thing that could have happened is that the lid went on and started orbiting the earth – highly unlikely, still. It’s probably still floating up there. And if things weren’t worse already, think of this – the first man-made object ever to orbit the earth was a manhole cover? Or, the fastest man-made object ever to travel inside the earth’s atmosphere was a manhole lid? Damn!

[Source 1] [Source 2]

Outperforming Humans – Speed

By Anupum Pant

Humans can use tools, communicate, count, make others laugh, socialize and are self aware too. We also have emotions and a pretty good memory. All of the things put into a single creature sure makes the “most advanced” creature we’ve ever known. But if these traits are considered individually, you’ll easily find an animal who beats us at one trait at a time. Today, I wanted to read and write about where humans stand when it comes to speed.

Talk about running speeds and the fastest person ever, Usain Bolt comes to my mind. A bolt indeed. As on date, if I’m not wrong, the world record set by him in the 100m race is 9.58 seconds. To put this human freak show into perspective, the average speed of the Jamaican sprinter in this race comes to about 37 km per hour (23 miles per hour).  And he’s clocked 28 mph somewhere in the race, they say.

In a world full of cars and planes, where distances travelled have become really huge, 28 mph sounds like a speed which does no good in our practical lives. And yet, it takes an Olympic runner to clock that speed. Normally, people run at about, say 10 mph. Damn!
The biological human limit to running speeds is estimated to be about 40 mph.

Quick fact: The fastest human objects ever are Helios 2 (a German probe) clocks about 150,000 mph. Another spacecraft, Juno does about 25 miles in a single second!

Now compare that with a Peregrine Falcon which can make use of the gravity and its perfectly aerodynamic body to travel at a speed of 216 mph (360 kph). But, that’s hardly any work for the animal. It’d the gravity making it fall.

In level flight, the white throated needletail (swift) can fly at speeds more than 100 miles per hour (up to 106). That’s the fastest bird if you do not count gravity assist.

An on land, of course the Cheetah takes the prize with about 70 mph of running speed. But, there’s a catch. If you measure speeds of animals relative to their body sizes, there’s a little blood sucking mite that beats cheetah by a huge margin.

The fastest swimming fish is the sailfish, which can swim and jump for small distances at about 70 mph.

Humans can swim at about 5 miles per hour.

Moving at 35 miles per hour a jack rabbit can travel faster than a human. The patas monkey, the fastest primate, runs at about 35 miles per hour too!

Now these are some animals you probably already know. Soon there’s more to come. In the coming days I wish to do a series on outperforming humans…Maybe I’ll write about endurance next.

Keep reading for more.

Is Cheetah No Longer the Fastest Land Animal?

By Anupum Pant

Read this for the answer to the question above

If you haven’t previously heard of the Betteridge’s law of headlines, also known as the Davis’ law or the journalistic principle, here’s what it says:

Any headline which ends in a question mark can be answered by the word no.

(Of course, you aren’t supposed to take the “law” too seriously.)

Did you see the headline for this article? So, basically you can read no further and still say – No, Cheetah still is the fastest land animal. But if you look deeper, things sure get interesting.

Absolute Speed vs. Relative Speed

To be specific, Cheetah is the fastest land animal because its absolute speed on land is the highest (112 to 120 Km per hour). When you measure absolute speed, you don’t take into account anything other than the speed. The weight or size of the animal doesn’t matter. Here, Cheetah is a clear winner.

But, when you do take into account the body length of an animal and measure the speed in terms of, number of body lengths the animal can cover in a single second, there are number of other animals that beat Cheetah by a huge margin.

Here’s a fact – When running at full speed, cheetahs can cover the length of up to 16 to 20 cheetahs in a single second. That’s pretty fast. The fastest humans on earth can do about 10 – 11 body lengths per second. [Source] Do you know what’s the fastest animal of you measure speed relative to their respective body lengths? Wait for it…

It is a mite. Yes, a tiny little 1-2 mm Californian blood sucker can cover up to 322 body lengths in a single second! Scientists just found out about it. Graphic designers who’ve used elegant cheetah silhouettes to represent speed in their graphics will have to use a tiny blood sucker now? How disappointing!

By the way, 322 body lengths in a single second of a sesame sized animal translates to just about 0.8 km per hour of absolute speed. But, imagine this. If it (the Californian mite) were the size of a human being (which it is not), it would have moved at a whopping 2,100 km per hour. I know the physics of it would have been different in case it were that big. Since it is not, we aren’t even putting in the effort to consider those details at the moment.

In case someone comes searching for the scientific name of this mite, it is called – Paratarsotomus macropalpis (I won’t remember that)

Other land animals “faster” than the Cheetah

  • The Australian tiger beetle held the record before they found out about the tiny mite. The beetle can cover up to 171 body lengths in a single second.
  • The household cockroach is pretty fast too. It does about 50 body lengths in a single second.
  • The ghost crab can run at about 100 body lengths per second.

All of them, much “faster” than the cheetah (in relative speed). And still Cheetah always wins the race because it is absolutely the fastest land animal. Still. Please don’t trust the click bait titles like:

Cheetah beaten to title of fastest animal in the world by tiny Californian mite