RobusEtCeleritas

RobusEtCeleritas t1_ispugn9 wrote

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RobusEtCeleritas t1_iril2kl wrote

Yes. The escape speed is the minimum speed needed to escape from a given position, for ballistic motion (where gravity is the only force, so the thrust and drag are zero).

So if the object is able to thrust forever, it can escape.

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RobusEtCeleritas t1_iqryjyd wrote

An energy of 13 TeV in the center-of-mass frame means that you can produce particles with a total invariant mass of up to 13 TeV/c^(2). So for example, you could produce a particle/antiparticle pair where each particle has a mass of 6.5 TeV/c^(2).

>With GUT energy and Plank Energy occurring at from what I understand at a order of magnitude of around 1025eV and 1 X 1028eV why do some physicists believe they will find new physics at say 200TeV?

There could still be new physics between what we've currently observed and where we expect the GUT scale to be.

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RobusEtCeleritas t1_iqnftki wrote

An object falling vertically, while subject to quadratic drag, will have a terminal velocity of

v*t* = sqrt[W/b],

where W is the weight of the object and b is the coefficient of the drag force.

If you apply a downward force F in addition to the weight of the object, the terminal velocity will instead be

v*t* = sqrt[(W + F)/b].

So for F > 0, the terminal velocity will be higher than the F = 0 case.

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