Recent content by xcgirl

This is a general question. In struggling hard in my stat and thermal physics course, especially with homework from kittel and kroemer. I am looking for another book that would have more examples so that I can have an easier time with home work problems. Would anyone have any suggestions ?

Homework Statement A conductor, maintained at a potential V, contains a spherical cavity of radius R. A point charge q is placed at a distance a ( a < R)from the center of the cavity. Find the potential of the electric field in the cavity . Homework Equations I was considering using...

Homework Statement First, there is a graph showing x initial at (0,0) and x final at (1,1) Given: F = xy i +xyj Find the work done by this force moving the particle from x initial to x final. [note you'll need a relationship between y and x] Homework Equations W = Fdcos(theta)...

thanks, i got it now!

I think that it means that the ball is caught at the same height that it is thrown from, so its a net displacement in the y-direction is 0.

Homework Statement A quarterback can throw 60yd @ 45 degree angle. How fast can he throw? Homework Equations 60 yds = 54.86 meters The Attempt at a Solution x-direction d = vt 4.86 = vcos(45)(t) y-direction d = vt + 1/2at^2 d = vsin(45)t + 1/2(9.8)t^2 I want to solve...

Homework Statement A = 2i - 3j + 3k B = 4i +2j + k C = i + 2j - 2k a) Find the work done by force A to move an object C b)Find the work done by the forces A and B acting together that moves an object C c)Suppose point O is defined at the tail of C. Find the moment of force A applied...

thanks, you're a lifesaver! i totally get it now

so I can do... BxA|A||B| + BxB|A||A| + AxA|B||B| - AxB|B||A| BxA|A||B| - AxB|B||A| so would that be the final answer? thanks for the help, this all just seems a little weird to me. I didnt know that you could just essentially "foil" it like that

Homework Statement C= B|A| + A|B| D= A|B|-B|A| C and D are orthogonal Find a third vector perpendicular to both C and D Homework Equations [AxB] = |A||B|sin(theta) The Attempt at a Solution I know that to find the answer I need to find the cross product of C and D. I have done...

when i do this, i am getting very large numbers, larger even then the actual volume of the earth. I'm not sure what's going on.

Homework Statement Assume that the Earth is a sphere with circumference of 24,900 miles. a. Find the volume of the Earth north of latitude 45 degrees. (hint: integrate with respect to y) b. Find the volume of the Earth between the equator and latitude 45Homework Equations circle: x^2 + y^2...

anyone have an idea?

Homework Statement Two packing crates of masses m1 = 10.0 kg and m2 = 3.00 kg are connected by a light string that passes over a frictionless pulley as in Figure P4.26. The 3.00 kg crate lies on a smooth incline of angle 42.0°. Find the acceleration of the 3.00 kg crate. Homework...

i think i got it now m1g - T = m1a T - m2g = m2a so 6(9.8) - T = 5a T- 2(9.8) = 2a then i'll just solve for a in one of the equations and use substitution Thanks for all the help!