New answers tagged earth
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Why is aurora borealis circular in shape when viewed from space?
Geomagnetic flux lines originating inside the auroral ovals are dragged by the solar wind to form the outer lobes of the magnetotail and ultimately connect to the interplanetary magnetic field (the ...
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Variation of $g(t)$
I think you are struggling with the differences between implicit and explicit time dependence, which was well explained here.
It is true that, since $r=r(t)$ and generally $g=g(r)$, we think about $g$ ...
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Why does not the Moon get faster?
I have not studied about orbit formulas of orbital velocity yet, but you can rely on the following before going to orbit related formulae.
A simple way to understand is that if the moon was closer ...
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Does flying an airplane opposite to the Earth's rotation direction save fuel & time?
It is actually the opposite way around. Note that the velocity relevant for fuel consumption is not the absolute velocity of the plane, but the velocity relative to the air it is travelling through.
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Why does not the Moon get faster?
... the moon is also an example of parabolic motion, right?
Not quite. The Moon's orbit relative to the Earth is (approximately) an ellipse. Like a parabola, an ellipse is a conic section. Unlike a ...
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Can we light a lightbulb using Earth's electric field, if it was inside a medium with high charge density?
Can we power a turbine using Earth's gravitational field, if it was inside a fluid with high density?
The configuration is explained in the diagram below.
As you can see, in the above diagram, the ...
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