That’s true, but just to add a little more info, I think it has to be mentioned that gravity itself does not cause the slowing down of time. The root cause is the distortion of spacetime around mass/energy. One result of this is time dilation, another is an acceleration as observed by an outside reference frame. The first result is the slowing down of time, the second result is gravity. Basically, in general relativity, we acknowledge that gravity is just an acceleration, but since in classical physics we didn’t know how this acceleration came about, we attributed it to an invisible force that Newton quantified as his universal gravitational force.
Saw this today:
It’s a short video, not much text.
This video showcases the reptilian humanoid’s biological profile:
Looks like the truth has been exposed :mad:
NASA doing super sonic test flights
I was really impressed by how easily they stopped the spin, it was so precise.
Inertial dampening of a sort, maybe, or just that they’re gotten really good at…
that term that has the meaning of why moving your arm in space means your whole body moves with it. It’s not momentum, it’s like 3 words.
I can’t remember. Fark.
… are you talking about conservation of angular momentum? Lol cause that’s what happens when you move your arm and your whole body moves but looking at context, you might mean moment of inertia, like they manipulate moment of inertia so that you need smaller force to stop the rotation.
Something like that, yeah. It’s how dudes in spacesuits move about if they don’t want to use their vernier jets; I figure it might be a fine-tuning of just starting and stopping, if you will.
so, it’s possible to “swim” in space? Like you muscles create some type of energy that moves stuff…
Big Bang could be the result of a 4-dimensional star collapsing in a blackhole
http://www.sciencedaily.com/releases/2014/08/140807145618.htm
science, oh you. in quantum mechanics theres possibility of particles spread over an infinite space, to rearrange and spontaneously contract into a singularity.
I think its the last stage of cold death after all black holes evaporate.
this sounds less far fetched.
@tekno virus, if a piece of metal 4x4, say steel, can withstand say 1000 psi per square inch, and then another identiavl sheet was instead rolled up into a cylinder. would it withstand the same pressure. i know tolerances changes with shape and surface area. but would it be weaker, stronger, the same?
Well unless you push something else opposite the direction of motion, you’re not actually gonna move. Manipulating moment of inertia just allows you to actually get to a position that’s rotated from the original, even as angular momentum is conserved during the entire process.
Kinda like when you’re sitting on one of those fun, rotating computer chairs and you’re trying to turn to face another direction, it seems like whatever motion you do to face your body to the right, your butt and the chair twist to the left so when you realign your body everything cancels out. But if you tuck your arms in and twist your body to the right and your butt twists to the left, then you spread your arms out and untwist your body and butt, you end up with a slight net turn to the right, even though angular momentum was conserved throughout the process.
Yeah, that’s what astronauts do; it’s magnitudes easier in space because of no gravity/other counteracting forces against your momentum.
I mentioned this a while back, great minds think alike haha. I never thought I’d meet anyone who reached the same conclusion.
It would satisfy why the big bang singularity exists, the exponential expansion since its release, the relativistic time experienced in this isolated space-time, and why we had slightly more matter than antimatter in our universe instead of even quantities of both.
In fact, I made an entire thread about it long ago in old srk land.
well, I read most of that a while back when I was reading up on how particles behave when I first started reading into quantum mechanics.
I’m… pretty sure it would be weaker. It’s far easier to crumple something tall than to totally flatten something that’s already mostly level by nature. The cylinder being pressed down on to crush it is going to contort faster that sheet metal by nature because it fits more points of stress in its increased vertical height.
Square cube law and compressive strength stuff are what’s going on(http://en.wikipedia.org/wiki/Compressive_strength), I believe!
I’ll take a stab at answering this one.
Your problem statement is a little off. The intrinsic strength of a material is measured in units of force per area squared, so psi or pascals, for example. (http://www.engineersedge.com/material_science/yield_strength.htm looks like a decent summary of strength.) The strength of a system then depends on both the geometry as well as the loading. Your statement that the applied force is per square inch could suggest that the load is distributed evenly (which would be the case for something like pressure) but even then we cannot say anything without knowing how your piece of metal is supported. Is it supported just at the edges, or are there beams underneath supporting it? And if we wanted to be very thorough we would need to look at how it’s fastened to its support. (Bolted? How many bolts? Tack welded or welded along the entire length?) This could concentrate the force further or the joining method may even be weaker than the bulk material.
As far as withstanding pressure, a cylinder is decidedly better than a box. I was hoping to find formulas, but I can’t because, well, no one uses boxes to withstand pressure. But it’s not too hard to wave my hands and say that the wall of a box is weakest in the middle where it’s farthest away from its “supports”, while the wall of a cylinder is kind of “supported” all the way around. (You have the same problem at the ends of a cylinder, but by making it long and narrow you can make a beefier cap while keeping the walls thinner.)
So I’ll just end with this quote from Wikipedia, which takes it one step further:
That’s the result of things that are angled/curved not contorting like 90 degree angled/straight lined stuff does; crumple zones in cars, and trees(go with the wind, don’t go AT it), of all things, rely of these principles.
nothing to see here
lalala
The insides of the cylinder are going to be filled with co2 to the point where the gas goes into sub-critical phase of about 60 bar or ~61 atm @ around 30 degrees Celsuis. So the gas is pushing from the inside
It’s from the inside out, not from the outside
I do remember talking to my frined once about shapes, and he told me a circle is the best at withstanding pressure that’s exerted on it, due ot every point being equidistant from the origin point.
Like I said, the cylinder has two lids (screw on), with valve on either end in which the liquid co2 will be evacuated into another long cylinder that’s constructed to mimic a fictionalization column.