When the ping-pong ball is hit at supersonic speed …

In animation, Japanese students usually have the power of conan the destroyer, and playing ball always feels like a high-tech war.
In reality, can humans play ball games so ferociously?
(All the articles are professional, please don’t imitate them at home.)
Although it is impossible to rely on manpower, we can use the power of air and machines, such as the "vacuum table tennis cannon."
A cannon is actually more like a pipe. When a cannon is fired, the speed of the accelerated table tennis can reach 450km/h, which is about one third of the speed of sound.
At this time, the table tennis directly crashed into the coke with air pressure, and this can was like a punch in the abdomen:
What if the speed of table tennis is increased to supersonic speed? Will it be more powerful? In fact, mythbusters, a well-known popular science team, made a similar attempt many years ago.
According to their test, the average adult can hit the ball at a speed of about 112.6 kilometers per hour after swinging.The speed of sound is 1224 kilometers per hour, which is an insurmountable gap.
Unless, of course, the table tennis player is a machine.
After several attempts, they successfully increased the speed of table tennis to 730 kilometers per hour by pressure jet, which directly penetrated the 2.5 cm cardboard, but this speed is still far from the speed of sound.
At this time, the "vacuum ping-pong cannon" appeared.
To put it simply, this device is to put a ping-pong ball at one end of a pipe and then seal both ends of the pipe:
Then, the air in the pipeline is drained to make it enter a vacuum state, and then the seal at one end is punctured, and the air will rush in wildly and then fill the vacuum space.
At this time, the table tennis in the middle will be pushed by the air and move to the other side at high speed, and there is no air obstacle on the road.
The power of this kind of vacuum cannon has been improved remarkably. With only a 1.8-meter-long pipe, the ejection speed of table tennis has reached 600 kilometers per hour.
And if we add a pressure chamber to the vacuum cannon and increase the length of the barrel, the speed will be upgraded again.
(Image from Purdue University of Technology)
But it is not as long as possible. Once the barrel was lengthened to 47 meters:
The acceleration effect is different. After firing, the human eye can’t see the ball moving at all, and the ball disappears directly:
However, when the table tennis flies out of the barrel, it has been squeezed out of the ball by resistance.
In the end, the barrel was reserved for 6 meters, which not only ensured the integrity of the ball, but also reached the speed of 1770 kilometers per hour, which properly exceeded the speed of sound.
So, "What destructive power will the vacuum table tennis cannon have now?The researchers set the shooting target-a thick pig elbow.
Fill in table tennis, adjust the pressure, pump out the air and fire!
Table tennis hit the surface of the pork completely, and the elbow suffered great damage. A round wound immediately appeared on the epidermis:
But the injury doesn’t stop there. Under this wound, there is a wound with a depth of nearly 4 cm:
However, this wave of injuries is difficult to subdivide how much table tennis can account for. After all, it broke at the moment it touched pork, and the subsequent injuries were more like air cannons.
But overall, it smells like animation.
There are still many people who use "table tennis vacuum cannons" to sabotage. They have chosen all kinds of strange targets for testing.
Mark French, a professor at Purdue Institute of Technology, and his students, combined a supersonic table tennis cannon with a pressure chamber and a vacuum gun, which is said to be faster than an F-16 fighter.
(All the articles are professional, please don’t imitate them at home.)
In the face of this kind of attack, the table tennis bat can do nothing at all and is directly penetrated:
When you hit a tape, it’s like hitting tofu:
Not only did the tape break a hole, but the carton at the back also broke a hole:
Carton:
The most cruel thing is to play a row of cans and disappear in an instant:
Look at the injury of cans, it should be destroyed by the group:
With such destructive power, it is no wonder that the professor emphasized on the whiteboard that he is a professional team and advised others not to try it at home.
Bruce Yeany, a physics teacher, also tried to play cans. From the effect point of view, he used more power:
But when he bombarded the watermelon, he encountered a problem, that is, the quality of table tennis was too small after all, and it broke directly in front of the watermelon:
Is this the only survivor in the table tennis test?
However, watermelon didn’t laugh for long. The teacher unhurriedly increased the weight of table tennis, not much, just filled it with water:
Now, watermelon immediately becomes watermelon juice:
Watermelon: Can’t you afford to play?
However, the most extravagant way to play table tennis vacuum cannon comes from anchors Dianna Cowern and Brandon.They aimed a cannon at an iPhone 11 Pro worth more than 6700 yuan:
How can I put it? The moment when table tennis hits the mobile phone is quite artistic. Maybe this is the happiness of being rich.
(All the articles are professional, please don’t imitate them at home.)
(Part of the picture material in this article comes from the Internet, only for learning and communication.)
References:
https://www.youtube.com/watch? v=bAKqzAzfXKQ
https://www.youtube.com/watch? v=msgfm4DHiyc
https://www.youtube.com/watch? v=-HfaLqmRO1k
https://www.youtube.com/watch? v=wBY3Z4F0dxk
https://www.youtube.com/watch? v=YYNCGZCul1Q Physics Girl https://www.youtube.com/watch? v=rk-6wHimbUs
https://www.youtube.com/watch? v=JYivWedGCKc
https://www.youtube.com/watch? v=ts7v07lXmTQ
https://www.youtube.com/watch? v=nIL3HN4PQlI
https://www.youtube.com/watch? v=Z52yCL3tSGQ
https://www.youtube.com/watch? v=whkCwx2axQM
https://www.youtube.com/watch? v=87Cpe4bJn0U
Source: Mad Pill Science
Editor: xx
Reporting/feedback
Everyone is searching.
The table tennis movement in the competition includes the table tennis falling from a height when it is advancing. The jumping height is the fastest table tennis attack speed, and the fastest table tennis attack technology is () Fast speed is one of the outstanding characteristics of table tennis. The table tennis rules stipulate that the ball should be thrown when serving.



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Wake up in the starry night

Please ban table tennis, because table tennis can cause unimaginable harm in some people’s hands, especially in the hands of water injectors, which can easily shoot people in the eyes.

2020-09-02

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Liyue 8l

Remember+

2020-09-05

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Single-player small game enthusiasts

Forgot to be funny. That’s it?

2020-09-04

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All 4 replies

Liu Fang the butcher

Vacuum pump is very expensive!

2020-09-02

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Meteor star gap

Mechanical vacuum pump can play, but it’s not that powerful. But it’s much better than vacuum cleaners

2020-09-03

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Liu Fang the butcher

To achieve the effect in this article, the Roots vacuum pump with a million rmb will start!

2020-09-02

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All 6 replies

Lever and his friends’ daily life

L: hey! A, I brought you …
L was used by A to play table tennis …? Killed)
(l was born again)
A: Er … Hug …
(A is eliminated by cause and effect)
(a is born again)
(A is eliminated by cause and effect)
(a is born again)
(A is eliminated by cause and effect)
(a is born again)
A: stop! I surrender! I surrender!

2020-09-02

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Lever and his friends’ daily life

L:……
L:A……
A: I don’t know. Don’t ask me.
L:U……
U: what is quantum?
L: Er … ……Sans, you explain.
Sans:zzzzzzzzzzzzzzzzz ……
L:SSSSSAAAAAANNNNNNSSSSSS! ! ! ! ! !

2020-09-04

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Natural selection region

Enthusiasts in science field

Is the quantum state macroscopic, and the collapse state is realized through self-observation?

2020-09-04

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All 4 replies

Azul ink rain

How are light particles produced?

2020-09-02

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Natural selection region

Enthusiasts in science field

As a result, you are trapped in the track of the curvature engine and can’t move.

2020-09-04

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Think about it.

Start my curvature engine quickly

2020-09-04

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All 4 replies

mp364m

What I lack are table tennis and cannons? What I lack is an Apple phone!

2020-09-02

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Maliania, the blade of Michella.

This kind of air cannon seems to be at the level of one million RMB.

2020-09-02

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T’s advantage lies in my T.

I thought, this air cannon may be more valuable.

2020-09-02

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Super snow leopard MVP

All the articles are professional, please don’t imitate them at home?

How to imitate? 1.8 joules into the orange!

2020-09-02

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Fengqi captain

And use interchangeable words. What is an orange?

2020-09-02

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0321426as

I just want to ask: how expensive is this table tennis? The inferior table tennis we used, the speed of which was only over 20 kilometers per hour, was smashed by our table tennis racket and split in half.

2020-09-02

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Bodhi shines all over.

However, Xiao Pang broke the ball with a backhand at the World Championships several times and flew directly in half.

But Zhou Yu’s time …

It’s almost a sense of sight after being shot.

2020-10-14

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Theoretical progress

More than 20 kilometers per hour is less than 10m/s, and nobody can run fast. You can smash the ball. . . 9.18 complain about the business!

2020-09-03

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All 5 replies

Tianxing lost his heart

Curvature can be used next time

speed up

2020-09-02

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Tianxing lost his heart

True light

Particle strike

2020-09-13

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Maybe it’s a tomahawk

Wait, why did the earth fall?

2020-09-02

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Kawakaze Jiangfeng z6

The quality of water-injected table tennis is 20g, and the known exit speed is 1600km/h, that is, about 440m/s, and the kinetic energy is equal to one-half mass times the square of speed, and its kinetic energy is about 20 * 440 2/2 coke, which is calculated to be 1.93 * 10 6 coke, which can be approximately counted as 2,000,000 coke watermelon: I thank you tm.

The kinetic energy of this table tennis ball far exceeds the upper limit of 1.6 joules, so

//

@ account has been cancelled.

This content is temporarily invisible.

2020-09-02

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Angry dung beetles

What did you say? I can’t understand it. Please be more specific.

2020-09-03

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Qingluan glazed lamp

An hour ago.

2020-09-02

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Drama loves z1.

Want to do it, is it illegal?

2020-09-06

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v_qiu

Well, the speed of leaving the chamber exceeds the standard. Whoever tries it in China is illegal.

2020-09-02

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Elegant skn0624

Mythbusters is a real popular science program.

2020-09-02

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Luoguodaren

The writer of the article must be a graduate student with severe internet addiction, and he is flying like a kite.

2020-09-02

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Yan’s terminator z fu soul Soviet shirt z

Bench (only after reading it)

Don’t spray funny.

2020-09-02

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luckgodmo

Won’t the air in table tennis explode under vacuum?

2020-09-03

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Subway planning designer

If you use billiards, the power is even harder to imagine.

2020-09-02

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Juesheng Nanmo

This is one of the reasons why the per capita consumption of resources in the United States ranks first in the world. Just like PINKRAY  Jr. knows what it’s like to have three tones a year, he wastes a lot of experimental props, sees foreign children doing domino experiments on TV, and there are a lot of things on the Internet that are similar to putting people into shredders.

2020-09-02

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Thunder and lightning doctor sheep call animals.

We China people, just addicted to mobile phones every day, laughing to death, China is silent?

2020-09-02

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eyrbxjeusus

Boy, I won’t watch the funeral film without this thing.

2020-09-02

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Damn dog

The martial arts in the world are only fast and unbreakable.

2020-09-02

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kn12A

Faster than F16, air defense ball

2020-09-02

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