1. If every one around the world played a low note on a Chello, would the vibrations attracted each and cause a global earthquake

2.

3. My intuition tells me that the output energy of even six billion cellos would be insufficient to produce a meaningful effect, even when we take into account resonance.

I can absolutely state that they could not produce a global earthquake, since all earthquakes are restricted geographically. If you meant by global earthquake one that could be sense globally, well that is true of even quite small earthquakes, with the right equipment.

I suppose in a hypothetical situation the cellos might trigger an earthquake a few seconds earlier than would have otherwise been the case, but for practical purposes that is meaningless.

(You would get no better effect with a tenor sax.)

4. Originally Posted by Rob_Trafford
If every one around the world played a low note on a Chello, would the vibrations attracted each and cause a global earthquak
I guess it depends on the low note. I do not know what would happen but I know something would happen. We can never say absolutely about anything.

5. Originally Posted by Mother/father
I do not know what would happen but I know something would happen.
In the preceeding months sales of cellos would skyrocket.

6. The energy of a magnitude 4 earthquake is about 6.3E11 Joules.
How to compute the energy released by an earthquake.

If the earthquake lasts 6 minutes, then the average power is 6.3E11/(6*60) watts.

Divide that by 6 billion (6E9) cellos, and you get 0.29 watts per cello.

This seems somewhat feasible, except you could never get the power of all the cellos concentrated into one place. The sound is dissipated in the air, and wouldn't travel more than a few hundred meters.

7. Originally Posted by Rob_Trafford
If every one around the world played a low note on a Chello, would the vibrations attracted each and cause a global earthquake
But everyone in the world are really spread out, they would have to be standing next to each other.

8. Originally Posted by John Galt
Originally Posted by Mother/father
I do not know what would happen but I know something would happen.
In the preceeding months sales of cellos would skyrocket.
On a related topic, this explores the consequences of "What would happen if everyone on earth stood as close to each other as they could and jumped, everyone landing on the ground at the same instant?"
Everybody Jump

9. Originally Posted by Strange
Originally Posted by John Galt
Originally Posted by Mother/father
I do not know what would happen but I know something would happen.
In the preceeding months sales of cellos would skyrocket.
On a related topic, this explores the consequences of "What would happen if everyone on earth stood as close to each other as they could and jumped, everyone landing on the ground at the same instant?"
Everybody Jump
You are talking about mass movement would it shift gravity any? I am guessing that it would ballance itself out.

Of the seven billion people on the planet if you consider every one is doing something either the same or something differet, some breathing in, some breathing out, some standing on both legs, some on one, some on none at all. If you can see the earth as one being then this being is capable of doing everthing at the same time. Hmmm, Kind of interesting.

10. Originally Posted by Mother/father
You are talking about mass movement would it shift gravity any? I am guessing that it would ballance itself out.
As the article says, it would have no noticeable effect (because all the people in the world have insignificant mass compared to the Earth). Although, "the sound of all those feet hitting the ground creates a loud, drawn-out roar which lasts many seconds."

It does explore the consequences of gathering the entire world's population in an area the size of Rhode Island. It does not end well.

11. If a stone will be broken by just I touched by my hand. It must be very attractive. Though my hands will be destructed. :x

12. jeez

13. Originally Posted by Strange
Originally Posted by Mother/father
You are talking about mass movement would it shift gravity any? I am guessing that it would ballance itself out.
As the article says, it would have no noticeable effect (because all the people in the world have insignificant mass compared to the Earth). Although, "the sound of all those feet hitting the ground creates a loud, drawn-out roar which lasts many seconds."

It does explore the consequences of gathering the entire world's population in an area the size of Rhode Island. It does not end well.
It just crossed my mind Strange, would it not at least make a spike in the gravity force if every one were to jump at the same time no matter where they were? I overcome gravity evertime I move although I am infinately small. As logic dictates the totality is the sum of all parts.

14. Originally Posted by Mother/father
It just crossed my mind Strange, would it not at least make a spike in the gravity force if every one were to jump at the same time no matter where they were?
I assume the point of getting everyone as close together as possible, in that question, is to make the force of everyone jumping act in the same direction. If people were (fairly) evenly spread out across the world, then the forces would (roughly) cancel out. But the forces involved are insignificant, either way.

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