It would be under high pressure, but buoyancy would be largely irrelevant, as the density of the external medium would not be water-like. The stuff inside the sphere would sufficiently weigh it down.
Let's assume for a minute that money was of no concern. If one has a 10 MPa external environment and needs to have vacuumed-out spheres (or 1 atmosphere, close enough to call vacuum) inside of that environment.
In particular, I was thinking of a sandwiched lattice of maraging steel, with it's...
There was someone who once got hit by a particle beam in the USSR, albeit of much lower energy. It seems to have made a high-aspect ratio, extremely deep but localized radiation burn. I.E. Burning a hole in him. He did live, but had permanent injuries and... weirdness happen to that side of his...
In thinking about what it would take to make a feasible invisibility cloak or holographic disguise or perfect hologram room, I've imagined something that works like this:
A light beam "image" is projected onto a device designed to refract or reflect it in all directions, but only 1 color in any...
Well technically, it will give you the right answer to 15 decimal places as long as you know what to make it do. After 15 decimal places, it will give you the wrong answer due to floating point errors.
Yes, but what IS its current form? A ball of rock? A ball of lava? A ball of compressed metallic vapor? Is it likely to have an atmosphere? Is it evaporating? Is it made of plasma?
100-times-scaled planets would be problematic. Earth, for example, would have 3 solar masses and, before its inevitable collapse into a white dwarf or neutron star or some other mysterious very dense object occured, have 100 G of gravity on its surface. a 100-times-scaled human wouldn't be able...
The hot side of Kepler-70b is immensely hot. It orbits a star 21.8 times brighter than the sun at a distance of just 0.006 AU. The equilibrium temperature of a blackbody at that distance is about 7770 Kelvins, hotter than the surface of the sun by a substantial margin. The maximum temperature...
It just occurred to me that in the right gravitational field, say, in a low orbit 100 km from the core of a neutron star with a mass equal to that of the sun, an orbiting object's center of gravity is somewhat noticeably displaced from its center of mass. Specifically, 1 meter closer to the...
Suppose that you given a $1 and flip a coin, if heads, you double it and flip again, if tails, you keep it and nothing else happens.
How much, on average, would this opportunity be worth? In other words, how much, on average, would you make.
Hint: the answer is most-certainly not $2.
I don't think this is the case, Here is why:
A normal person consumes about 9 MJ per day.
The heat released is around 900 J per second.
So, you'd run through your 9 MJ in just 10000 seconds, less than 3 hours.
But, people frequently spend more energy than this exercising, 200 Watts is not an...
Exactly, so instead of one Saturn V, we need to figure out a way to launch 200 Saturn Vs and land them all with fuel still there on the Asteroid.
Makes this even less feasible.
Of course, there is always the nuclear option, if you vaporize part of the asteroid, the gas expelled kicks the rest...
There are some weird effects of this kind of system, one effect is that, say the space station is rotating at a surface velocity of 10 m/s, then running retrograde at such a speed would result in getting stuck floating around.
And of course, the crushing 4 Gs if you decide to run along with the...
Well, and object certainly can't spin with the surface at C.
If gravity is irrelevant to the object, and it is made of graphene, it could reach around 15 km/s or so.
Quasars, being black holes, can really spin at anything from 0 to C.