Recent content by Tobbin92

If the question was given in the same way as above then I suspect that you only would have to justify your answer with a calculation in b). But my experience says that a calculation as extra justification will never harm. Therefore you might add a mathematical argument to support your answer in...

I am currently taking an introductory course in astrophysics and I love it. Just as Chronos says it demands a good understanding of undergraduate mathematical courses i.e. Calculus and basic linear algebra. It also expects a deep understanding of Newtoninan mechanics and it is to your advantage...

Why should length not be contracted in this case? Think that part through again and make sure that such a statement can be justified.

Time along with space is not absolute and depends on the observers speed. This comes from the fact that the speed of light is a constant and involves both time and space (meters per second). Therefore time and space has to adapt in order to please the law of a constant speed of light. The...

According to Einstein no point in space can be considered central or correct, the same thingst goes for time. Both times are equally correct.

The difference in mass is what is relevant, ((Mass before)-(Mass after)).*c^2 = E. To calculate this you also need the mass of the neutron. The mass of the neutron can not be calculated and needs to be taken from a table. Also in order to get the mass in kilograms for the other nuclei you simply...

It all has to do with the mass difference, (mass before) - (mass after) = (released) or (consumed energy). The values for the nuclei´s masses has to be taken from a table. There is no way of calculating the mass of a nuclei, it has to be measured.

I found the solution after a lot of searching in my coursebook. Apparently it falls out from the definition of an event, as event is defined (At least in my literature "Spacetime Physics - An introduction to special relativity") the initiation of an event is an event in itself. Therefore the...

Alpha decay is when a nucleus, obviously displeased with its present state splits into one helium (2 protons, 2 neutrons) and another nucleus that has two less protons and neutrons. So in this case the reaction would look like this: 14/7N + 1/1H ---> 11/6C + 4/2He (15 = 15, amazing!) Since a...

It is the algebra that is the problem, try to argue out the accelleration again and see if it helps.

Homework Statement One event is separated from another by a lightlike interval, can the first event have caused the other. Homework Equations The equations are not important. The Attempt at a Solution It all seems to boil down to the definition of an event, can you call the light...