Recent content by STOKER

Hi ZapperZ, I feel it would be discourteous of me not to respond to your post. How do I answer your question? I don't even know where to start. I can't help the feeling that it is not a genuine desire on your part to understand my motivations, but simply (and I hope I have very seriously...

Thank you vanhees71, that was very considerate of you. I haven't got time to read and digest it just yet, as I am immersed in a PhD, but I do hope to try and educate myself to become a physicist, and I gratefully receive anything you more learned minds can teach me

Thanks, you guys are awesome!

Thank you very much for your extremely prompt reply! I only partially understand though, sorry. Doesn't the equation for General relativity contain a c to the power of 4? Why 4 in one case, and 2 in the other? Once again, I hope my ignorance is not too cringe-inducing!

Hi everyone, I'm not a physicist, so please excuse my ignorance. In E=mc2, why is c squared? And why is the value exactly to the power of 2? Why not 2.1, or 2.438? I looked at a few other threads on this forum about this equation, but couldn't find anything addressing this aspect of it. Thanks...

Hi dmehling, I'm not a physicist, and I'm also way out of my league intellectually just visiting here, but I just completed a geology degree so I might be able to make a useful contribution to this thread. Absolute age of the Earth is determined by zircons in volcanic ash beds and lava flows...

Hi stedwards, Sorry for having such a thick skull, but yes, that is my focus

Hi stedwards, So does this mean that there is a velocity gradient the further you move from the magnetic stirrer bar, both horizontally and vertically. But if there is a greater volume of water in the lower half of the beaker due to the weight of the overlying water column, wouldn't that mean...

Thanks for the moral support stedwards, it's appreciated

Hi gsal, guilty as charged. I agree fully with your criticisms, and am chastened by them. Your points are so valid, they are probably worth incorporating into the forum rules/guidelines, whereby all experiments described must include measurements/dimensions/scale, and an adequately detailed...

Thank you gsal. That was most kind of you to go to so much trouble to explain it to me. And yes stedwards, I was referring to a magnetic rod at the bottom of the beaker (stirrer bar). The principle would be similar though wouldn't it?

Thanks for your input stedwards.My brain is quite slow at processing this sort of stuff

Thanks again gsal, I don't doubt that your understanding is far superior to mine, but I'll need to think further about it as my understanding of it is still a bit fragile

Hi gsal, thanks for the reply, it's much appreciated. I'm game for a greater degree of complexity in your explanation. The vortex formed is funnel- shaped, and I was wondering why the radius diameter at the base is narrow, compared to the greater width at the top, and would the water speed vary...

Hi Guys, Please excuse my ignorance. I was wondering about the physics involved in the vortex created by using a stirrer bar in a beaker of water. Is this Bernoulli's Principle, of balancing speeds and pressures? And does the resistance offered by the sidewall of the beaker completely change...