Recent content by Foghorn

Homework Statement Water with pressure of 120 kPa is flowing through a rectangular pipe with velocity 1.9 m/s. At one point, the pipe narrows to one half of its original diameter. What is the velocity of the water at this narrower point? What is the pressure? Homework Equations v1A1 =...

Awesome. Thanks! I super simplified the problem following your post: M = m1v1 + m2v2 Mx = m1v1x + m2v2x = 5 My = m1v1y - m2v2y = 0 KE = .5m1v12 + .5m1v22 KE = (.5*m1*v1x2 + v1y2) + (.5*m2*v2x2 + v2y2) Taking your advice, I basically got: v1y = v2y v1x = \frac{5}{m} - v2x Plugged it all...

Homework Statement Object A has a mass of 2.0 kg and an initial velocity of 2.5 m/s. It strikes Object B, which is at rest and has a mass of 2.0 kg as well. After the collision, the objects travel in different directions, with Object B traveling at an angle of 44 degrees from its...

Homework Statement Determine the chemical shift, integrated intensity, proton type, multiplicity, J (Hz), and # of protons on the adjacent atoms for this spectra given a 400 MHz NMR. http://img411.imageshack.us/img411/7629/chem262lnmr1.png Homework Equations (n+1) rule? (n+1) x...

Homework Statement A cross between two plants that both have green flowers produces 80 offspring plants, of which 36 have green flowers, 23 have black flowers, and 21 have blue flowers. Color variation is due to inheritance at one locus. What is the genotype associated with each flower...

It seems to me that a feather, under realistic conditions, would display reduced acceleration. Wouldn't the force of air resistance counteract gravity?

Homework Statement (1) If you measure the acceleration of the falling mass to be 7.2 m/s^2, should you be concerned that you somehow made a mistake? What if you found the acceleration to be 11.5 m/s^2? For this question, a falling mass is attached to a piece of paper, which is subsequently...