Recent content by Spirochete

These questions relate to the secondary coulometric titration of vitamin C. In this titration an applied voltage is used to generate a current that oxidizes Iodide to iodine. Iodine then oxidizes vitamin C. A starch indicator detects excess iodine via the formation of I3- My questions are...

Thanks for your help so far it's my bed time so I won't be replying every seconds any more.

wow I'm tired I mistype again I'm sorry. The question does ask for the answer in mm, so 0.471 should be correct if everything else is right

Yeah I had a friend online plug my numbers into a calculator and it ended up as 4.70952x10^-4 meters which corresponds to 0.471 m. Still wrong. My algebra is the same as yours.

so the numbers I'm plugging in look correct?

oooh I forgot to give the question! What is the spacing, in mm, between the slits?

Homework Statement Light from a helium-neon laser (wave length 633 nm) is used to illuminate two narrow slits. The interference pattern is observed on a screen 3.1 m behind the slits. Twelve bright fringes are seen, spanning a distance of 50 mm What is the spacing, in mm, between the slits...

Homework Statement The standing wave in the picture is oscillating at 100 Hz. What is it's velocity? Homework Equations Velocity=(wavelength)(frequency) I believe is the equation that applies here. The Attempt at a Solution The wavelength from the picture appears to be...

Brilliant. thank you.

I've attached an MS paint version of a GRE geometry problem. It's a quantitative comparison question. It asks you to compare two values and say whether one is greater, they're the same, or they're not enough information to say which is greater. In the picture I drew everything is in...

Oh i see now. thanks guys

Homework Statement This problem asks you to compare two values and say whether one is greater, they are the same, or the problem does not give you enough information to answer the question. In this question they give you a symbol, in this case "+" and then define what it does to a number...

Well I don't see how I could figure it out without plugging in two very different numbers for Bill, and then solving for Gina. I tried Bill=One and then Bill=1000 and got two different answers, therefore the answer is "not enough info."

B+80=2G Is that right?

Actually I believe this is a special case where you can get a numerical answer just because the P's happen to cancel.