Recent content by physics&math

Homework Statement The problem asks to find the flux through a cylinder of radius R and height h. Homework Equations Flux = ∫∫FndS over S F = (ix + jy)*ln(x2+y2) The Attempt at a Solution After finding the unit normal vector (n) to the curved surface of the cylinder, the...

I believe it would be 3. A more intense light source would mean more photons to liberate more photoelectrons. More photons= more photoelectrons. Also higher intensity = more photons. higher intensity = more photons = more photoelectrons, which is what 3 says. 4 says that intensity and the...

I believe it would be 3. A more intense light source would mean more photons to liberate more photoelectrons. More photons= more photoelectrons. Also higher intensity = more photons. higher intensity = more photons = more photoelectrons, which is what 3 says. 4 says that intensity and the...

Work = force * distance. If distance = r, then Work is the integral of Force*dr.

Tension is just mv2/r. Gravity is acting perpendicular to the tension force. Don't try isolate m or v separately. Remember, kinetic energy is .5 mv2.

Are you sure you have the lower limit on y written correctly? Did you mean y = x3/2 or y = 3x1/2? Either way, neither of those lines are linear. Which means that r isn't going from 0 to 1 but from the lower y limit (converted to polar) to 1. To find the upper limit on theta, you have to...

Homework Statement Find the volume using cylindrical coordinates bounded by: x2+y2+z2=2 and z = x2+y2 Homework Equations Converting to cylindrical coordinates: z = √2-r2 and z = r2 The Attempt at a Solution I figured z would go from r2 to √2-r2 r from 0 to √2 and θ...

50V is ε0. ε0 = NABω. NAB doesn't change. Solve for NAB and use that value to solve for the new ε0.

sorry, misread the post. it said horizontal. So it is definitely a right angle from the vertical

Unless the problem says otherwise, assume Fpull is at a 90° angle from the vertical. Force diagram. You'll have three forces: tension, Fpull, and the force of gravity. The tension will have two components.

I'm no expert, but I'm pretty sure it doesn't matter all that much. Is it nice to go to a school that everyone knows? Yes. Is it essential? No. Since you want to go to grad school grades, test scores, and research experience are most likely far more important than the name of your school. (Of...

I'm not entirely sure if this would work, but you could try applying the ideal gas law. P1V1/T1 = P2V2/T2 Then you would only have to solve for P2. (Since the system is closed, V1 and V2 would cancel).

Thank you both so much!

1. Use a triple integral to find the volume of the given solid. The solid enclosed by the cylinder x^2 + z^2 = 4 and the planes y = -1 and y + z = 4 This looked like a cylindrical coordinate system to me, except for the fact that it is not cylindrical around the z-axis but the y-axis. I...