Recent content by Mkbul

Wow, thanks a lot for the very analytic reply. I have never seen this equation before, but to be fair i am new to relativistic mechanics. I'll definitely read these articles too.

I am glad you can make sense of my post. I did some research in the forums but also in the internet, sadly i couldn't find any older post asking the same question, but i certainly found lots of interesting information about black holes. I was thinking that the singularity was a point, because...

Thanks for the quick reply, i really appreciate it! If they do not collapse down to a point, then what stops the collapse after it has begun? So the singularity of a black hole actually has a radius? And since it's got a radius, does that mean it's density is not infinite? I have heard too many...

Hello people, I have a question regarding black holes. The way i understand it, black holes form in supernovas, and they occur because the gravitational pull of the stellar remnant is so great that nothing can stop it, and it basically collapses down to a singe point, virtually nothing... Now...

Interesting thought. If the net force is zero then i can find, by equating the two spring forces the different extents. So, at the meeting point: ∑F=0 ⇔ F1=F2 ⇔ k1Δl1=k2Δl2. But we already know from my equation that: k1Δl1=mg. So we got those two equations now. We can also say that the total...

Not exactly semester exams! I am giving national exams this year for the right to enter a university. t minus 10 days until i give the first lesson. Thanks for the good luck! So much stress...

Hello forum. Panhellenic exams begin in less than 10 days and stress is slowly but steadily been overtaking me these last few months. I've been solving problems out of a physics book, and i got stuck in one which involves mechanical oscillations (spring-mass system). 1. Homework Statement A...

Moving is not an option, it takes way too much money. Other than that, thanks for the tips on the revision, but it is quite a challenge to make things fun an interesting when half the lessons i am giving have nothing to do with physics or what i want to become. And again, thanks for the reply...

Hello everyone, my name is Mike, and i am 18 years old. In a month from now, i am going to be giving the national exams my country does to qualify for a university. Unfortunately, there is no idea to know in which university i'll pass, if i pass at all. These exams are known to be difficult...

Hello guys. I attempted a solution to this problem as well, because it looked interesting since i am giving exams. I got a different result than you folks though. Here is my solution: EDIT #3: I shouldn't be doing this late at night. Here is my final attempt. Not sure if right or wrong, but...

Thanks for the reply, mfb. I did the first step and solved the complex equation, and the points that satisfy it belong in a circle with center K(2,0) and radius r=1. Unfortunately that was the easy part. The inequality is not in the real numbers but in the complex number system. V a0, a1 and a2...

Hey all. I am giving Panhellenic exams this year, and part of my preparation comes from solving previous' years questions. This problem was a complex number based one, in the 2013 Panhellenic exams. It goes as follows: Consider 3 complex numbers, α0,α1 and α2 which belong in the line given by...

Well yeah, once again the fault becomes wet, but the bricks are not forced away

Ok, so today i made a new very simple model and i'd like just to discuss it with you all. Ive put a broken brick (x, y, z: 10, 2.5, 4 Splited up to 5, 2.5 and 5 (cm)) together in a marked with walls (20cm x 20cm x 5cm) area. The bricks were representing the Earth's crust. I've then brought a...

Mine :P Why this to me?