Recent content by pellikkan

the indefinite C after integration usually has to be found from some equation in accordance with some boundary condition, constraint, or other condition. It can often be found to be zero that way. You might be confusing multiplication and addition between your two paragraphs.

Yes, thanks very much. The qso histogram is excellent. As for the number density of galaxies, I am searching through those references, and thanks so much for relating those. I have found a quite direct answer in a publication at http://adsabs.harvard.edu/abs/1946MNRAS.106..121F, which...

Can anyone point me to some references? Greetings All. I am searching for a couple of numbers, but my books are packed away and stored somewhere due to moving. I was hoping someone could provide the best accepted observational values and the reference sources for those numbers. First I am...

well, i'll give that a shot,... I 'd say that in a constant gravitational field, we know w = mgx But mg = const, so differentiating both sides ... dw = mg dx but since x = (1/2)gt2 we differentiate each side to get; dx = (1/2)g2t dt = gt dt so that dw = mg gt dt =...

Thanks SophieC for comments, yep, that is interesting, ..if power is defined as energy delivered within a time period t, ie, p = w/t we'd get in that outlook, p = (1/2)Mg2t, which is linearly proportional to the time. However, if I'm not mistaken, power I think might be...

Thanks there Doc for your kind and swift reply!

Hi there everyone, Would like some checking of my work or comments. Would like the work done on a falling mass M as a function of time. To begin, the relation for work as function of distance.. w = Mgx but would like as function of time so substitute x this way, x = (1/2)gt2...