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0 votes
2 answers
53 views

Gravitational effects on a celestial body and the difference between a pendulum and a regular clock

Imagine a planet with the same properties as Earth, this time moving in an elliptical orbit around a heavy star of a large number of solar masses. Also imagine that the surface of this planet is as ...
Apsteronaldo's user avatar
1 vote
0 answers
86 views

How does a curvature in time equate to Newtonian gravity? [duplicate]

I often read that a curvature in time (the rate at which clocks tick) near a massive object, is considered to be the source of Newtonian gravity. This got me wondering, does General Relativity use the ...
4D Menu Systems's user avatar
1 vote
3 answers
197 views

Equivalence Principle in Newtonian Physics vs GR: A Thought Experiment

I have a question regarding the equivalence principle as it applies in Newtonian Physics and General Relativity. Consider a thought experiment involving a free-falling elevator. Inside the elevator, ...
Kenneth A's user avatar
0 votes
1 answer
100 views

Gravitational time dilation in weak field

A plane flies at a constant height $h$. I should calculate, which speed $v$ the plane shoud have, such that an observer on ground sees the a clock whithin the plane tick in the same rate as a clock on ...
B.Hueber's user avatar
  • 854
4 votes
2 answers
414 views

How do we age if we tunneled to Earth's core?

Scenario Suppose there exists an advanced technology that can hypothetically transport living humans to study the center of the Earth, as they goes deeper underground most of the Earth's mass would ...
user6760's user avatar
  • 13k