Recent content by Seinfeld4

Thanks a lot! In retrospect, it was a foolish mistake. If the velocity had been 10.67 m like I had originally thought, then the momentum would not have been conserved at all. In fact, the momentum at the point of minimum separation would have been twice the value that the system started with...

Thanks for the reply! That's very interesting, I didn't realize that. So, if I assign a negative value to one of the initial velocities, then the magnitude of the conservation of momentum calculation becomes 5.33 m/s instead of 10.67 m/s. With this new velocity value, the distance becomes...

Hi, I'm confused about this question as well, so I thought I would revive this thread instead of starting a new one. I believe I might have done it correctly, but the answer I got doesn't seem too realistic, so I would definitely appreciate it if someone could check my work! First, I found...

That's a very interesting geometric interpretation. I tried to solve this question again using a trigonometric approach, but conceded after about 30 minutes of not really getting anywhere. It's actually interesting that the solution in the book does not require the use of the complicated...

Thank you both for the very detailed responses. @Simon Bridge: Your 'brute force method' is actually exactly how the book does it. I suppose that must be the most direct and least convoluted way to do it. I have a bad habit of making math problems seem more complicated than they really...

I'm a beginning calculus student and this is one of the 'challenge' questions from an older edition of the Stewart's Calculus series of textbooks. I believe I did the question properly, but the solution in the book is completely different from my own attempt. I'm not good enough at math yet...

Homework Statement The Ka of H2PO4 is 6.3 * 10^-8. The Ka of HS is 1.3 * 10^-13. Write a formula for the reaction of these substances and explain your results. Both are amphoteric. The Attempt at a Solution The formula is: H2PO4 + HS <--> HPO4 + H2S I figured that the H2PO4 will...

Ok, I thought I was doing it properly. I'm not sure why they made a question that produced a % error greater than 1000. Anyways, thanks Borek!

Homework Statement Hi, I need to calculate the Ksp of Ag2CrO4 based on experimental data. During the experiment, 1.25g of pure copper was placed in a 1.00 L solution of silver chromate. When the copper was extracted, only 1.24g remained. Balanced chemical equation: Cu + Ag2CrO4 -->...

Hey, I'd appreciated an answer to a really basic chemistry question. If I increase the volume of 1.0 mol/L hydrochloric acid from 50mL to 100mL, does that change the concentration? Will an antacid tablet dissolve more quickly in 50mL or 100mL of hydrochloric acid?

The emission spectrum of an unknown element contains two lines - one in the visible portion of the spectrum, and the other, ultraviolet. Based on the electromagnetic spectrum and Neil Bohr's model of the atom, account for the difference in energy between these two lines. I'm having a bit of a...

Cool, thanks!

Homework Statement How much energy is required to change one-quarter of 8.0kg of water at 25 C into steam? The way I see it, the entirety of the 8.0kg of water must be brought from 25 C to 100 C, then only 2.0kg is changed to steam so... Specific heat capacity (of water) = 4200 J / kg...

Ok, thanks a lot, much appreciated! Just one more quick question if you don't mind. What are the basic energy conversions that take place when someone at the top of a snowy hill toboggans down? Is it just gravitational potential energy - kinetic energy Or, is it gravitational...

Thanks for the response! Hmmm...my book says h = ((v1)^2 - (vf)^2) / 2g. I just triple checked. Oh well, I just assumed that the negative height meant that it was being measured from the top down instead of the bottom up. But is 3.38m the correct answer then? I would have thought it...