Recent content by richengle

cool. blender with manta, right? how long of baking to make 5 sec of simulation?

box fan

id like to model water from a faucet. my simulations have it just running straight down, and not necking. it must neck because outside pressure is greater than inside pressure, no?

water flow from a faucet will neck down its radius as it flows to the bottom of the sink. It is asserted that this is due to the fact that gravity increases the velocity of the fluid. This is shown at . I am trying to simulate this, and am not having much luck. shows this for a flat...

thanks, that explains a bike wheel. but i tried it with a fan, and didnt notice any precession. is it because it has less mass?

Does anyone know what the minimum speed of a gyro to make it so a force at 0deg will yield a movement at 90deg... or even better, what the angle is wrt speed... see http://www.copters.com/aero/gyro.html for pictures. -thx, rich

an interesting way of putting things. so one can only change so much stuff with respect to time. the stuff is xyz and time? but the relative Velocity shouldn't change anything, no... so is it you can't acellerate things, else you retard time?

Thanks pal. the tough part is that when i read the wiki article, there seems to be multiple views on it, interwoven, yet inconsistent. in one part they say its the acceleration that changes age; in another they say it is the velocity. which do you favor?

like, people quote and use time dilation as if it really changes the second[ship] observers time... but isn't it just apparent ... like i was reading Twin paradox - Wikipedia ... and it said that all aging difference happens on the way back, as listed in the section callled -A Non space time...

Thanks for the TWIN PARADOX ref. The history section explains it well. I wish i had the experiments that einstein mentions. but if there is no preferred ref frame, they should age the same. after all, light is the same for each frame, so they would age the same?

exactly, so how can they say that if you go on a ship and move fast, your clocks actually slow... but like u said, each frame would see the other ones slower, right?

thanks, but moving away from earth, the clock should appear slower, and moving towards us, the clock should appear faster? In the end, it should cancel out? isn't dilation based on appearance? Like, there should be no preferred reference frame. the sun is moving thru the universe, that...

if you could leave the planet, and wait a year in space... would you age much much faster than a person on Earth because the Earth was moving relative to you and you are out of Earth's gravity field [like a higher up clock]?

it seems right. Have you got your answer yet?

here is the second video of the series;;;