Recent content by Droctagonopus

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    How do we know the orbits of the planets?

    Thank you all for your replies. Can you explain or link a resource explaining what measurements are made and how they are made and what calculations are then performed to determine the orbital parameters? Thanks in advance.
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    How do we know the orbits of the planets?

    What exactly does it take to figure out the orbital parameters or planets and what's the Math behind it? Can it be done using only a telescope or is it necessary to send a probe?
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    How can the electrical conductivity of graphene be measured?

    Thank you. :D Another, kinda unrelated, question I want to ask. Would exposure to cosmic radiation, which is mainly fast moving protons affect the conductivity of a sample of graphene in any way?
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    How can the electrical conductivity of graphene be measured?

    I've tried searching for it but while there are a lot of hits on the fact that graphene's conductivity is high, there seem to be very few on how the conductivity is actually measured. Would you use the same method as you do with metal wires? Using cross sectional area, length, an ohmmeter...
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    How many defects in graphene would kill its conductivity?

    I'm sorry, but all these links refer to articles that seem to be really far out of my current knowledge reach. Could you please help me out? I understand that cosmic ray flux is a unit which quantifies the amount of particles passing per unit area. "Transport in undoped graphene is related to...
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    How many defects in graphene would kill its conductivity?

    I had a random idea about the effect of cosmic rays on graphene's conductivity. I found out that cosmic rays would create defects in graphene over time. How many of these defects would significantly reduce the conductivity of graphene? How do I go about calculating how much time the graphene...
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    Can graphene work in outer space?

    How exactly would defects affect graphene's conductivity?
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    Can graphene work in outer space?

    I had a random idea and wanted to know whether graphene could retain it's conductive properties after being exposed to cosmic rays. I know that graphene gets it's conductivity from the free electrons from its carbon atoms. I know that cosmic rays consist mainly of protons, with the minority...
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    Position-time equation from force-position equation

    I mean, is there was a way to do it without going through the process of obtaining a velocity equation?
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    Position-time equation from force-position equation

    But does the velocity equation have to have a time variable in it? And also, is it possible to do this from an acceleration equation?
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    Position-time equation from force-position equation

    By inverting the equation, do you mean getting an equation of x in terms of t?
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    Position-time equation from force-position equation

    Sorry I forgot to mention that I was working in one dimension. And what does the dot above the x signify?
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    Position-time equation from force-position equation

    I've been trying to obtain an equation of position in terms of time given force in terms of position. I've tried and I think I've managed to obtain an equation of velocity in terms of position using work and kinetic energy but I haven't managed the position time equation. This is how I got...
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    The net force and centre of gravity of a one dimensional object

    Thanks. I understand the force now. To summarise for the centre of gravity. If, instead of a rod, there existed another point mass of the same mass of the rod, the position of this point mass so that it has the same force exerted on it as on the rod is the centre of gravity of the rod. Right?
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    Accurate position change for accelerating objects

    If an object is subject to different forces at different times and these forces are totally unpredictable (the force at any instant after the current time cannot be predicted). How would we make the position change due to acceleration as accurate as possible? I have chosen a method but I've...
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