Recent content by flemonster

Hey Borek, I got it figured out later but thanks anyways for the help. A late response is better than none at all!

Homework Statement Calculate new freezing point and boiling point when 0.47 mol ethylene glycol and 0.14 mol KBr is added to 150g H2O. Express your answer using one decimal place.Homework Equations molality = moles solute/kg solvent ΔTf=i*Kf*m ΔTb=i*Kb*m New bp = ΔTb + normal bp New fp =...

And I just figured it out. That tutorial from UW did the trick which is kind of funny seeing that's where I did my undergrad. Thanks iRaid!

I'm not sure what you mean. I accounted for them being on different parabolas with the subscripts but is there something in their being on different parabolas that I missed?

Homework Statement Given the two parabolas: f(x) = x^2 - 2x + 2 and g(x) = -x^2 - 2x - 2. Find the equation of a line that is tangent to both curves.Homework Equations The given parabolas, equation for a line y = mx + b, and the derivatives of the two parabolas 2x - 2 and -2x - 2 The...

Homework Statement Given the following thermodynamic data, calculate the lattice energy of CaBr2(s) caculate the lattice enegy: (A) Δ°Hf CaBr2(s) = -675 kJ/mol (B) Δ°Hf Ca(g) = 179 kJ/mol (C) Δ°Hf Br(g) = 112 kJ/mol (D) 1st ionization energy of Ca = 590 kJ/mol (E) 2nd ionization...

I think the sum of the x-forces would be T30*cos(30) + T45*cos(45) = 0. But how does that come into play? If mass is added to the crate then wouldn't it be just the y-components that matter? Is that assuming too much?

So I'm basing my assumption that the first part is right on a practice midterm we did in class. My first thought when looking at the problem was that the 1900 N would be distributed through the two ropes, but my instructor set up the problem as if each rope could withstand up to 1900 N, not that...

Homework Statement The two angled ropes used to support the crate in the figure below can withstand a maximum tension of 1900 N before they break. A.) Which of the ropes would break first? B.) What is the largest mass the ropes can support before breaking? Homework Equations F...

So my friend got 0.46 for μs but if you all think the method I used for setting it up was correct then maybe my instructor made a mistake. She's giving us the chance to make up points on the midterm so I'll show her how I came up with the answer tomorrow and see what she says. And Simon, good...

Hi all, I'm in an algebra based physics class so I apologize if the way I approach the problem is different from what you might be used to. A buddy of mine is calc based physics always gets confused about how I set the problems up. Also, this is my first post! Thanks in advance for the help...