Recent content by Celer

I tried reading it, but I don't think my teacher have taught up to there yet... Is there another way to talk about ionic strength, and activity coefficients so that they kind of make sense in the context of this question? Thanks.

Ksp of Calcium Hydroxide - A Percentage Error of 480%?? Homework Statement I did a titration between HCl and Ca(OH)2. I use the indicator Phenopthalein I did most of my calculations and thru repeated checking cannot find any significant error in my calculations. However, upon...

So could anyone point me along a direction or something to work on? We're just learning vectors and I am finding this extremely confusing. Any help is appreciated...

Homework Statement I have four vectors arranged within a circle, with Vector A at 0 degrees with 1.47 N. Vector B is at 71 degree with 1.96 N. Vector C is at 152 degrees with 2.45 N. And Vector D is at 249 degree with 2.94 N. These vector are in Equilibrium. Calculate the resultant...

Uh yeah, I think I was confused over using Time and Period. It should be period. I got 1088.48 cm / s^2 I was wondering how to calculate the percentage error? Is it ( 1 - (980 / 1088.48) ) * 100 Anyways, thanks for your clarification and help Doc Al

Well, I know that length and period are used in this equation: T^2 = 4pi^2L / g. my measure of Time (s) is of 20 oscilliations of the pendulum. and Period = time / # of cycles. So is it what I am supposed to do is use Period ^2 instead of Time^2 ? Am I supposed to use T^2 =...

Using a simple pendulum to determine "g" 1. Using a simple pendulum to determine "g" Basically, we were asked to do an experiment where we measured with a stopwatch for 20 complete oscillations for a pendulum bob swinging through a small arc (10 degrees). We increased the length of the string...

Thanks for your help. Just one more minor question...I've read in my textbook that (hi/ho)= (di/do). If another question pops up with only height of image/object given could I substitute do with ho in the equation you showed? M= \frac{f}{f-d_{o}} Also, would...

Sorry, I have never seen these equations...my teacher rushed through the Optics units pretty fast. Do you mind if you explain what formula's you are using...I have only learned the Thin Lens and the Magnification one.

yes 2 known variables...but i have no idea which equation to exactly use. I have been trying going through all the equations in my optics unit... So how do I do this?

Homework Statement A lens has a focal length of 120 cm and a magnification of 4.0. How far apart are the object and the image? Homework Equations I used the thin lens equation 1/f = (1/di + 1/do)^-1 and M = -d image/d objectThe Attempt at a Solution I have been trying this by rearranging the...

So, would the mass of the person be unchanged, at 51 kg? I am not sure on what you meant when you said use the same equation as "C". Do you mean using Fg = mg? If so, how do I factor the given altitude into the equation?

Hi all, I'm new here. So anyways, I have been studying for exams by going through my old tests, and I found a question from one of them that I can't solve...I hope someone can help me. 1. A person stands on a set of bathroom scales which have been calibrates in Newtons. The scales read 500N...