Recent content by neilparker62

If you look deep enough into space and time , it seems just about everything you see is a galaxy: https://www.theguardian.com/science/2022/jul/11/nasa-james-webb-telescope-ancient-galaxy-images There are some foreground stars and I'd guess they're a lot closer than the galaxies behind.

So many galaxies! Hard to imagine the scale involved. Could some of the "stars" we are seeing also be galaxies. Maybe just smaller or alternatively further away ? Can a star be distinguished from what might just be a more distant galaxy ?

Should be a much bigger global concern than it is - 'climate change' is now "verba non grata" and the BBC article seeks to allay our fears: "The calving - and melting - of the largest icebergs like A23a is a natural phenomenon and not necessarily the result of climate change."

Ok thanks - that gives an idea of its relative size. About 11 times Earth diameter. And Earth's diameter (12742km) in turn is a bit more than twice that of Jupiter's largest moon Ganymede (5268km).

Pandora's box: ex USA a plethora of exotic games: cricket, rugby, soccer etc !

I take it that's an "Ibix original" :smile:

Great pic - just so as we have an idea of distances (and earth comparision) , can you perhaps add a rough scale to your pic ?

Thanks for the kind compliment but if truth be told I would say my maths is not much more than consolidated school level. I don't think I have any particularly special "connection" with AI. I just make use of it to solve problems as many others - the world over - are doing.

You can try @kuruman 's problem which Gemini managed to make a complete dog's breakfast of: Two balls are dropped from a top of a cliff at a time interval of ##t_0## . The first ball hits the ground and rebounds elastically, essentially reversing its direction instantly without losing speed. It...

To more specifically address the questions above we may note: 1) Mechanical energy is conserved for both balls and always totals mgH where H is the drop height. 2) Following from 1) the velocity of both balls originates from "converted" potential energy. Hence velocity at height h above the...

The equation above does use intervals - there's a ##\Delta t## and a ##\Delta v##. I think what it boils down to is to prove that the projectiles collide at time ##T_0+\frac{t_0}{2}## where ##T_0=\sqrt{\frac{2H}{g}}## and ##t_0## is the delay interval. To do this we can note that the bounce...

Symmetric

"It’s insane to think that they got on the moon with only 4kb of ram 50 years ago meanwhile nowadays they have their laptops with outlook on it" Should have used Linux :wink:

I think I might write that as: $$ \frac{\Delta v}{\Delta t}=\frac{\sqrt{2gH}-\sqrt{2g(H-h)}}{\frac{1}{2}t_0}= \frac{\sqrt{2gH}}{\sqrt{\frac{2H}{g}}}=g$$