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Drakkith's latest activity
Drakkith
reacted to
ChiralSuperfields's post
in the thread
Spaceship length contraction problem
with
Like
.
Thank you for you reply @Drakkith! Sorry I made a numerical error. Also no, you would not need to buy smaller clothes or a smaller...
Today, 12:47 AM
Drakkith
replied to the thread
Spaceship length contraction problem
.
So if the speed is zero with respect to you, would you need to buy smaller clothes or a smaller cabin? Where did you get 7.08?
Today, 12:04 AM
Drakkith
replied to the thread
Spaceship length contraction problem
.
If you are on the ship, and the ship accelerates up to 0.99c relative to the Earth, what speed is the ship (and cabin and everything...
Yesterday, 10:19 PM
Drakkith
replied to the thread
I
Viewing 1k x 1k slab of desert sand during extreme cold/hot temps?
.
For more detail: The change in the index of refraction for a lens is given by: ##n' = n + \frac{dn}{dT}ΔT## Where ##n'## is the...
Yesterday, 12:19 AM
Drakkith
replied to the thread
I
Viewing 1k x 1k slab of desert sand during extreme cold/hot temps?
.
Technically, each point in object space sends a cone of light that fills the entirety of the pupil. Individual sand particles do not...
Tuesday, 11:34 PM
Drakkith
reacted to
robphy's post
in the thread
Insights
Addition of Velocities (Velocity Composition) in Special Relativity
with
Like
.
Continue reading...
Tuesday, 1:05 AM
Drakkith
replied to the thread
I can't apply my knowledge of shielding to explain the three slopes
.
Purple only has 2 points per subsequence, so you can't really say it does or doesn't taper off. But the green points certainly look like...
Tuesday, 12:34 AM
Drakkith
reacted to
ohwilleke's post
in the thread
Stargazing
Dark matter and its effect on the orbit of stars
with
Like
.
Yes. But this possibility is heavily constrained, mostly to the point of being all but ruled out. See, e.g., this Wikipedia article and...
Monday, 10:15 PM
Drakkith
replied to the thread
I
Equality of Gravitational and Electrostatic force
.
For a hydrogen atom with a radius of 37 picometers, placed near the surface of the Earth, I get the following results for the forces on...
Monday, 1:58 AM
Drakkith
reacted to
Ibix's post
in the thread
I
Questions about Black Holes, Hawking Radiation, and Dark Matter
with
Haha
.
Ants can be pretty high energy. It's all the ant-y particles. Seriously, having now looked at the maths in a bit more detail, I see...
Sunday, 8:14 PM
Drakkith
replied to the thread
B
Pressure on creation of the Universe
.
Forgive me, Peter, I know the thread is locked but I just wanted to address this particular questions since it is so common: That's not...
Sunday, 7:24 PM
Drakkith
replied to the thread
I
Did Feynman make a mistake in the drawing of moving charges?
.
No, the diagram is clearly labeled, showing that E1 points left from q1 (the left arrow labeled q1E1), while the right arrow from q2 is...
Friday, 8:57 PM
Drakkith
replied to the thread
B
What unique contributions to math did linear algebra make?
.
Solving systems of linear equations and working with matrices, vectors, vector spaces, and linear transformations.
Friday, 7:29 AM
Drakkith
replied to the thread
History
For WW2 buffs!
.
True. Plane crashes typically spread burning liquid gasoline/petrol everywhere rather than disperse and then ignite it in a fuel-air...
May 16, 2024
Drakkith
reacted to
Baluncore's post
in the thread
History
For WW2 buffs!
with
Like
.
That is the case because it is the lift from the wing that must support the fuel tanks in flight. By placing the tanks in the wings, the...
May 16, 2024
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