Question 1: In the same year, the first steps towards generalizing Schwarzschild's solution to ________ objects were taken, which eventually resulted in the Reissner-Nordström solution, now associated with charged black holes.
Question 2: In the long run, they are rather simple objects characterized by eleven parameters specifying energy, linear momentum, ________, location at a specified time and electric charge.
Question 4: In the field of numerical relativity, powerful computers are employed to simulate the geometry of spacetime and to solve Einstein's equations for interesting situations such as two colliding ________.
Question 5: In special relativity, mass turns out to be part of a more general quantity called the energy-momentum tensor, which includes both energy and momentum________ as well as stress (that is, pressure and shear).
Question 6: ^{[120]} There is no generally accepted description of this new kind of matter, within the framework of known ________^{[121]} or otherwise.
Question 10: ^{[137]} Even in flat Minkowski space, when described by an accelerated observer (________), there will be horizons associated with a semi-classical radiation known as Unruh radiation.