/sci/ - Science & Math

I have time for a game of chess, anyone wanna play?

http://lichess.org/5g42yeve

>>3072369
>blame the people who've been trying to direct the world for the past 50 years
>faggots think they aren't to blame for setting us back several decades from where we could have been

>>2490427
I plan on throwing all my spare change at SpaceX once they go public.

Project Orion was a failure as an idea from the start.

NERVA was much more practical

http://www.daviddarling.info/encyclopedia/N/NERVA.html

>>2361715
I'm going to win this and use the notoriety and cash to start my business.

http://www.nasa.gov/offices/oct/early_stage_innovation/centennial_challenges/nano_satellite/index.ht
ml

Yes and no.

These guys did that with slide rules. I have acess to a five axis cnc at work that is big enough to machine 80% of what was needed in the Saturn V and those guys built it my counting ticks on dial after spending a week calculating geometry that can be pooped out of a computer now in less than a second. Why the hell don't we have a thriving colony on the moon should be the question being asked.

Fucking NASA spends 4 billion to half build a capsule and SpaceX builds a capsule and a rocket and launches it twice for 200m something stinks.

After you adjust for inflation NASA gets more cash now than it did during Apollo and all we have to show for it is some shitty ass science station in a useless orbit.

The real problem is fucking lazy ass risk avers greedy bastards everywhere in the space industry.

You are now aware that the best scientists (rocket) are also engineers (aerospace)

If a rocket has an exhaust velocity of 2.5 km/s and a thrust of 500 kg

What is the fuel flow rate in mass/second

Elected representatives...
are why we cant have nice things

Hey /sci/ I have a hard time figuring out this type of problem. This is not a homework question, I just don't know how to solve it...please help.

Jim can fill a pool carrying buckets of water in 30 minutes. Sue can do the same job in 45 minutes. Tony can do the same job in 1 ½ hours. How quickly can all three fill the pool together?