[Tycho?]

Ohhhhh right. That crazy dilution. Thanks guys, I knew it was something stupid like that.

Calculate the pH of the solution which results from the mixing of 100.0 mL of 0.050 NaOH solution with an equal volume of 0.10 M HCl solution. Seems straight forward to me. Strong acid and a strong base, so they'll react completely. You end up with .05M HCl, which is the molarity of H+, so you can just use -log(.05) to get the pH. I get 1.3. But this is apparently incorrect, the answer given is 1.6. Can someone tell me where I went wrong?

Calculate the pH of the solution which results from the mixing of 100.0 mL of 0.050 NaOH solution with an equal volume of 0.10 M HCl solution. Seems straight forward to me. Strong acid and a strong base, so they'll react completely. You end up with .05M HCl, which is the molarity of H+, so you can just use -log(.05) to get the pH. I get 1.3. But this is apparently incorrect, the answer given is 1.6. Can someone tell me where I went wrong?

Probably not.

All you guys are talking about are paradoxes. These have been a staple of sci-fi for what, like 70 years now. It does not follow that time travel is impossible because of it, since we dont know how such a paradox would play out in the real universe.

Nobody knows if time travel to the past is possible for not. There also is not a good general understanding of what would happen if it were possible. So who knows.

Well kinda.... But the more specific building blocks for life, like heavier elements, chemical compounds, planets and such are still being formed. Life could have arisin way before life on earth did, life could still be coming about somewhere else in the universe as we speak.

Am I experiencing a forum error here? Isn't this the physics forum? It says physics at the top of the page anyway.

sunspot why do you still post here? Your post count is 424 already and I have yet to see a single good post you have made.

AUs are used for distances within a solar system. They are far too small for the distance between stars and galaxies. For such distances light years or parsecs are used. You can look them up on wikipedia to find out what they are.

Using altitude find orbital velocity. Find momentum of combined mass. Find momentum of mass shot out back. Using conservation of momentum, find momentum of spacecraft. Find velocity. Find resulting altitude. Does this sound right to anyone? I've never done a problem like this before.

Uh, I'm not sure exactly what you're asking here. Take your time and write out sentances (and use good puncuation), making sure to explain what you are describing and making sure to articulate your questions. As it is you're all over the place.

Its kinda wierd that people call the sun yellow. Go out at noon one day, and glance upwards. What do you see? You dont see a yellow light, you see a white light. In fact I think the color of the sun is the definition of "white" light. It only appears yellow when it is setting, and the light is scattered a lot by going through so much atmosphere.

His sentance was correct.

Yes. It was released at around 300 000 years after the big bang I believe, when the universe became transparent to EM radiation. So the entire universe was glowing, thats the light that's still reaching us.

Well.... yeah. Thats the definition of gravitational redshift, that the EM radiation loses energy as it moves away from the mass.

Hahahahaha.

You are surely joking, that site is about as far from science as you can get.

Man thats pretty neat, I didn't know they could get so big and still observe those effects.

In no particular order... The Fifth Element Fight Club Donnie Darko 12 Monkeys The Matrix

Well you are given a bunch of masses. You must find a number that you can subtract from all of those masses that gives you 10 differences with one common factor. I dont know how to do that quickly, if I were doing that I'd make guesses about the size of the marbles then narrow my guesses using trial and error. I'd bet I could do it pretty quickly, if not elegantly.