I edited the question since this comment was (rightly) made:
There are few things that are more annoying than questions where the question text is not self-contained.
Quantum supremacy has been reached quite recently.
It is said that a quantum computer, because of its stronger computing power can simulate physical processes much faster than a classical computer.
Now, quantum computers make a huge amount of different permutations of whatever. How does this relate to physical processes?
For example, a classical computer can compute the trajectory of an object in our solar system with high accuracy. I can't see how a quantum computer can do this job by performing permutations with incredible speed. So I'm not asking if a QC can perform this simulation faster but if it can be calculated at all by a QC.
So here is my question: Is the collection of physical processes that can be simulated by a quantum computer limited to specific processes or is a quantum computer, in principle, capable to perform the same calculations (of every physical process) a classical computer is capable of?
I don't know that much about quantum programming (or programming in general), so an additional question could be if the algorithms used in a quantum computer program are similar to those used in a classical one but this I better ask on the appropriate site (specially dedicated to all stuff related to quantum computers).