User Agerhell

22 votes

How does an ordinary object become radioactive?

answered Jun 3, 2019 at 10:58

4 votes

Accepted

Does the density of an object play a role for it's gravitational effects?

answered May 15, 2019 at 14:08

3 votes

The distance square in the Newton's law of universal gravitation is really a square?

answered Apr 3, 2019 at 13:38

3 votes

Accepted

Voyager spacecrafts life span and theory of relativity

answered May 18, 2019 at 0:16

2 votes

Does potential energy in gravitational field increase mass?

answered Jun 21, 2019 at 19:41

2 votes

What is the exact gravitational force between two masses including relativistic effects?

answered Jun 7, 2019 at 14:25

2 votes

Time dilation in a gravitational field

answered Mar 23, 2019 at 15:45

2 votes

Isotropic Schwarzschild coordinates

answered May 5, 2019 at 13:21

2 votes

Could gravity be repulsive at short distances?

answered May 5, 2019 at 18:15

2 votes

Time dilation factor for the circular orbit at 3/2 Schwarzschild radius

answered May 4, 2019 at 11:02

2 votes

Accepted

Derivation of Post-Newtonian (PN) expression for acceleration in Schwarzschild geometry

answered Mar 25, 2019 at 7:14

2 votes

Whats the difference between the Photon Sphere and the Marginally bound orbit?

answered Nov 16, 2023 at 8:33

1 vote

Energy of an object near a black hole

answered May 4, 2019 at 21:47

1 vote

Separating the topics of general and special relativity

answered May 16, 2019 at 12:10

1 vote

Gravitational Redshift

answered May 28, 2019 at 13:08

1 vote

Mass of collapsing spherical shell

answered May 28, 2019 at 14:03

1 vote

Why is the gravitational force always attractive?

answered May 6, 2019 at 12:58

1 vote

Why are orbits $1.5r_{s} < r < 3r_{s}$ unstable around a Schwarzschild black hole?

answered May 12, 2019 at 11:10

1 vote

Inertial frames?

answered Apr 3, 2019 at 15:09

1 vote

Relativistic kinetic energy has no upper bound, so why is there a Schwarzschild radius?

answered Jun 6, 2019 at 18:57

1 vote

How does the speed (and kinetic energy) necessary to orbit a black hole vary with the radius of orbit?

answered Oct 19, 2023 at 7:16

1 vote

Can Schwarzschild acceleration be written in exact form as a function of position and velocity vector?

answered Oct 21, 2023 at 18:58

1 vote

Could a trajectory around a large mass ever deflect by more than 180 degrees due to general relativistic effects?

answered May 19, 2019 at 14:49

1 vote

Accepted

Is overusing gravitational slingshots a real concern?

answered Oct 29, 2023 at 1:16

0 votes

Cause-effect definition of fictitious forces

answered Nov 8, 2023 at 10:27

0 votes

Can Schwarzschild acceleration be written in exact form as a function of position and velocity vector?

answered Nov 10, 2023 at 22:35

0 votes

Can Schwarzschild acceleration be written in exact form as a function of position and velocity vector?

answered Oct 23, 2023 at 10:02

0 votes

Time Dilation in Orbits in the Schwarzschild Metric

answered Oct 24, 2023 at 22:05

0 votes

Equivalence Principle in Newtonian Physics vs GR: A Thought Experiment

answered Oct 27, 2023 at 13:42

0 votes

Will free-fall object into black hole exceed speed of light $c$ before hitting black hole surface?

answered Jun 6, 2019 at 19:41

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41 Answers

How does an ordinary object become radioactive?

Does the density of an object play a role for it's gravitational effects?

The distance square in the Newton's law of universal gravitation is really a square?

Voyager spacecrafts life span and theory of relativity

Does potential energy in gravitational field increase mass?

What is the exact gravitational force between two masses including relativistic effects?

Time dilation in a gravitational field

Isotropic Schwarzschild coordinates

Could gravity be repulsive at short distances?

Time dilation factor for the circular orbit at 3/2 Schwarzschild radius

Derivation of Post-Newtonian (PN) expression for acceleration in Schwarzschild geometry

Whats the difference between the Photon Sphere and the Marginally bound orbit?

Energy of an object near a black hole

Separating the topics of general and special relativity

Gravitational Redshift

Mass of collapsing spherical shell

Why is the gravitational force always attractive?

Why are orbits $1.5r_{s} < r < 3r_{s}$ unstable around a Schwarzschild black hole?

Inertial frames?

Relativistic kinetic energy has no upper bound, so why is there a Schwarzschild radius?

How does the speed (and kinetic energy) necessary to orbit a black hole vary with the radius of orbit?

Can Schwarzschild acceleration be written in exact form as a function of position and velocity vector?

Could a trajectory around a large mass ever deflect by more than 180 degrees due to general relativistic effects?

Is overusing gravitational slingshots a real concern?

Cause-effect definition of fictitious forces

Can Schwarzschild acceleration be written in exact form as a function of position and velocity vector?

Can Schwarzschild acceleration be written in exact form as a function of position and velocity vector?

Time Dilation in Orbits in the Schwarzschild Metric

Equivalence Principle in Newtonian Physics vs GR: A Thought Experiment

Will free-fall object into black hole exceed speed of light $c$ before hitting black hole surface?