Manuel Urueña Palomo

6 Questions 30 Answers 0 Followers

Questions related from Manuel Urueña Palomo

How can I make a contact and merge in shape topoly in ANSYS Workbench?

I have a streel structure and the welds need to be merged in share topology in SpaceClaim in order for the elements of both parts to match. But the contact between beam must no be merged in shared...

02 February 2020 6,561 3 View

Why antiparticles have sometimes positive and sometimes negative energies?

We know that the annihilation of a particle-antiparticle pair like an electron-positron results in energy released with the value of the sum of both energies from the particles. That means both...

01 January 1970 5,920 8 View

By which mechanism does Hawking radiation reduce the mass of a black hole?

To begin with, where is the mass of a black hole? If we are not able to define a location in spacetime for that mass, we could think just about the deformation of spacetime around the event...

01 January 1970 9,869 7 View

Do both of these two metrics describe exactly the same trayectories for test particles?

The first one is the common Schwarzschild metric from Hilbert. The second one is the original Schwarzschild metric from K. Schwarzschild with his choice of coordinates.

01 January 1970 5,905 11 View

Is gravitation invariant under time reversal in GR?

If we think about the time-reversed trayectories of a test particle whose trayectory is curved by the presence of a mass, the time reverse of that interaction looks also attractive and...

01 January 1970 7,358 4 View

Which interaction between negative masses should we expect? Repulsive like GR and Newtonian mechanics predict or attractive like in electromagnetism?

Bonnor and Bondi suggest that GR predicts antigravitational interactions between negative masses. Jame Farnes points out that Newtonian mechanics suggest the same. But in electromagnetism...

01 January 1970 6,735 29 View