[Archive!] Pure mathematics, physics, chemistry, etc.: brain-training problems not related to trade in any way - page 571

 
DmitriyN:
I don't know where to look for it anymore. It was someone's joke, there's just no way, even theoretically, to make a pipe 400-600km high.
what about a pyramid? like rings of 10 km in diameter.... narrowing slightly in diameter and increasing in height.....
 
DmitriyN:
A body moving on the surface of the Earth at 8 km/sec weighs nothing. Electrons in a kinescope, for example, don't weigh anything either.
And if you make a big current...

If you accelerate it to the second cosmic speed, will it fly into space?
 
Integer:
If accelerated to second space speed, will it fly off into space?
I don't think so, it's too easy :) But,
 
Aleksander:
what about a pyramid? like rings of 10 km in diameter.... narrowing slightly in diameter and increasing in height.....
As an option, but it is nota "grail" either, too much work and low efficiency of the solution.
 
DmitriyN:
...
And, if you make a big current ...
electrons get heavy at sub-light speeds and burst the wires at the bends... :)
 
well - a 15-20 km high pyramid is enough to make a pyramid.... there will be less air resistance, the missiles will take out more cargo by an order of magnitude....
 
Integer:

The catch is whether it is possible to get a geostationary satellite at the altitude the ISS is at. I don't know.


There doesn't seem to be a catch. Regardless of the speed of the earth we have a boundary zone distribution ( doesn't fall away) depending on mass

Now by adding the speed of the satellite's rotation around the earth, it is possible to reduce the distance to earth by increasing the velocity and considering the mass

 
Aleksander:
well - a 15-20 km high pyramid is enough to make a pyramid.... there will be less air resistance, the missiles will take out more cargo by an order of magnitude....
The pyramid will be expensive.
 
Mischek2:
The ISS rotates at 16 revolutions per day around the Earth. How can it not fall if it rotates at 1 revolution per day?
 
DmitriyN:
The ISS rotates at 16 revolutions per day around the Earth. How can it not fall if it rotates at 1 revolution?


We need to increase the orbit

Look at the solar system

The complete set. Different masses, different orbits, different speeds. Those closer to the sun tend to rotate faster, but given the masses.

Reason: