Recent content by lizzyb

like this? http://img691.imageshack.us/img691/3605/21166978.jpg how is this so different than the parabola flow we're used to seeing? because its not a 3-d tube? so u_max is at the center and the median of a triangle is 2/3 the height; u = 2/3 u_max.

Exact Question from Book For laminar flow in a two-dimensional passage, find the relation between the average and maximum velocities. Relevant Equations, etc I think for circular pipes we have: u = u_max - kr^2 (1) u: velocity u_max: maximum velocity at center of the pipe Work...

Thank you for your help. Reading that section of the chapter again I noted the sentence: So translating the statement to math: P = P - P => P = P - P chamber atm chamber chamber atm chamber gage...

State the Problem A gage is connected to a tank in which the pressure of the fluid is 42 psi above atmospheric. If the absolute pressure of the fluid remains unchanged but the gage is in a chamber where the air pressure is reduced to a vacuum of 25 inHg, what reading in psi will then be...

1. State the Problem A water initially contains 40 mg/L of Mg2+. The pH of the water is increased until the concentration of hydroxide ions (OH-) is 0.001000 M. What is the concentration of magnesium ion in this water at this pH? Give you answer in milligrams per liter. Assume that the...

State the Problem End A of a slender, uniform rod of weight w and length L bears on a horizontal surface ash shown, while end B is supported by a cord BC of length L. Knowing that the coefficient of static friction is 0.40, determine (a) the value of theta for which motion is impending, (b)...

does your answer need to be to the nearest tenth? (458.9 g)

I came up with the right answer using 15 degrees on the bottom (there was an error in one of my equations). I used maxima to solve the simultaneous equations. Thanks for you help.

should the normal force at the bottom be slanted 15 degrees or should it, too, be at 67.38 degrees? I tried it with the bottom being 15 degrees and came slightly off but I had to use a computer program to come up with the answer - there's a lot of computations...

oops there is a glaring error in the calculation of the distance between the ladder's center of gravity along the x-axis - it should be 1.25.

We're to find the smallest mu_s given that the ladder is 6.5 m, m = 10 kg, and mu_s is at each surface. http://img408.imageshack.us/img408/4034/0821diagram1.png Work completed thus Far http://img255.imageshack.us/img255/5127/08210001.th.jpg...

How do we set up the normal and friction force at the place where the ladder (the red line) touches the corner? http://img56.imageshack.us/img56/6655/prob08021sketch01.gif Worked Done So Far I used a normal force the headed off to the top left at 45 degrees and a perpendicular friction force...

I came up with the correct solution taking the average value of E at psia = 15 and 4500 (E = [348000 + 320000]/2); how would I justify this?

Homework Statement "Water in a hydraulic press is subjected to a pressure of 4500 psia at 68 F. If the initial pressure is 15 psia, approximately what will be the percentage decrease in specific volume. Use Table 2.1 (below)." Homework Equations...

This is from the solutions: http://img195.imageshack.us/img195/9210/scannedimage061.jpg http://img188.imageshack.us/img188/1713/scannedimage062.jpg