Recent content by George3

Homework Statement What concentration of formic acid would give an aqueous solution in which 2.85 percent of the formic acid molecules are ionized? Assume that Ka for formic acid is 1.80E-4 . Homework Equations The Attempt at a Solution X^2 / .0285 - X = 1.8E-4 X = .00226 M =...

So if you integrate dW = kq *dq/r you end up getting W = k/r * the integral of q *dq from 0 to Q. Which just ends up being W = kQ^2/2r right?

Homework Statement Determine the total electrostatic potential energy of a conducting sphere of radius r_0 that carries a total charge Q distributed uniformly on its surface. Give your answer in terms of Q, r_0, epsilon_0 and appropriate constants. Homework Equations The Attempt at...

Anything guys?

URGENT! Dimer-Monomer Percentage Homework Statement In the gas phase acetic acid exists as an equilibrium of monomer and dimer molecules.(The dimer consists of two molecules linked through hydrogen bonds.) The equilibrium constant for the dimer-monomer equilibrium (CH3CO2H)2 <=> 2 CH3CO2H...

I was able to get it thanks for the insight it helped a lot.

So did you take (2/5)MR^2 for both radii and then subtract the two moments of inertia? Which formula for I did you use??

BUMP... FINAL TOMORROW NEED HELP ON THIS I really need help on this. And to the previous poster the moment of inertia of a hollow sphere is bigger than that of a solid so your method would not work...right?

Homework Statement A hollow sphere has a mass of 15 kg, an inner radius of 12 cm and an outer radius of 18 cm. What is the rotational inertia (moment of inertia) of the sphere about an axis passing through its center? Homework Equations The Attempt at a Solution I = 2/3 MR^2 for a...

I was wondering if base isolation systems are used in the design and construction of skyscrapers. I was reading up on base isolation systems and they seem to be used in normal sized buildings frequently. Anyways, if anyone could give me some examples of base isolation systems being used in...

Homework Statement Exactly 2.9 seconds after a projectile is fired it has the velocity (9.0i +4.5j) m/s. What is the horizontal range of the projectile. Homework Equations The Attempt at a Solution Range = [((9.0i^2 + 4.5j^2)^1/2)^2 x sin2(arctan(4.5/9))]/ 9.8 m/s/s Range =...

For my code of the first function i havecome up with : function diffV = deltaV(t); %UNTITLED Summary of this function goes here % Detailed explanation goes here global rd xd rd = input('Enter a rate of water consumption: '); xd = input( 'Enter a percent of initial volume: ')...

Homework Statement `Suppose it is known that the graph of the function y= ax^2 +bx^2+cx+d passes through four given points (x_i,y_i), i = 1,2,3,4. Write a user defined function that accepts these four points as input and computes the coefficients a,b,c and d. The function should solve four...

Homework Statement Using estimates of rainfall,evaporation, and water consumption, the town engineer developed the following model of water volume in the reservoir as a function of time: V(t) = (10^9) + (10^8)(1-(e^-t/100)) -rt where V is teh water volume in liters, t is time in days...

Homework Statement P = RT/(V-b) - a/V^2 Ive been trying to solve this for V and just can't get it. Homework Equations The Attempt at a Solution IVe gotten to: RTV^2 -aV+ab = P(V^3-V^2b) Any Ideas?