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Endercreeper01

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Everything posted by Endercreeper01

  1. actually, this is correct because when you have something orbiting something else with a velocity v, then it is just like with regular length contraction. The length l'=lγ, so if first it blocked 10% and then v=.86c, then γ=1/2, so it is 1/2 the original length and so only 5% is blocked. But the thing with this is that it depends on the relative velocity and so it is relative. Relative to the piece of paper, then the light source is shrinking by that amount, so it blocks 1/2 of the light it did before. To a stationary observer and the light source, then the paper is shrinking and blocking only 5% of the light.
  2. gravitational potential energy u=GMm/r, so the closer they are, then the more potential energy
  3. But does this violate conservation of energy? Because just by these 2 masses going closer together is making there be more potential energy. Energy is being created, and energy cannot be created or destroyed. So does this violate conservation of energy?
  4. but what gives mass the energy to attract each other?
  5. Where does the energy for gravity come from? I know there is gravitational potential energy, but where is it from?
  6. i mean that because the circumference changes and the radius does not, this means that the angle θ changes. With a full disk, θ=2π, so the circumfrence, which is the same as the arc length of a full circle, is 2πrγ, but then if r does not change, then θ changes. For a full disk, when v=0, then θ=2π, but when v does not equal 0, then θ=2πγ. This means that part of it gets cut off and the angle it makes is 2πγ. But we are also forgetting that it depends on relative velocities. What are relative velocities like with angular motion?
  7. when you have a part of a disk with an angle θ that it makes (with a full disk θ=2π), then it would be how much the arc length s would change because the direction is rotational and since the radius would stay the same and s=θr then it also means θ would be changed so there would be θ'=θγ. With a full disk, then it is just like with the partial disk. In this case, them θ=2π, so then mabey it is just that it would become a partial disk and it would be 2π changing instead of r so then that would make it a part of a disk. Is this correct?
  8. If the circumference contracts, shouldn't that mean the radius should also? Because then if the circumference shrinks, the radius has to.
  9. You know how in Special Relativity then there are things that happen to objects as they approach the speed of light? What would the effects be like when something has angular motion? For example, when something has a velocity close to the speed of light, c, then it's length contracts in the direction of motion. The length l'=l/γ (where γ=(1-v^2/c^2)^(-1/2)). I think it would just be how much it decreases in radius, but is that correct? And also with length contraction, you use the velocity of it relative to something else. The relative velocity that 1 object is relative to another v'=(v1+v2)/(1+(v1v2/c^2)), But what are relative velocities like with angular motion?
  10. But then what would the acceleration be of an object in a gravitational field in general relativity?
  11. I was just wondering in general relativity how you would be able to calculate how strong gravity is? I know that you can calculate spacetime curvature, but how do you calculate the force of gravity in general relativity?
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