Recent content by db2dz

Homework Statement A uniformly charged rod is places along the x-axis from x=0 to x= L. carefully set up, but do not solve the proper integral to determine the x component of the electric field at the point (L,a) Homework Equations E=u \int \frac{dq}{(r^2)} for a line dq=λdl The Attempt at...

so i used dy to integrate and for a i got 2(pi)/3 which i think is right because i checked it with V = (1/3) π r² h. But i am not sure how to get b. i know its a cylinder with the cone removed and i think its volume is 4(pi)/3 but i still have no idea.

Homework Statement the directions are: compute the volume of the solid formed by revolving the given region about the line region bounded by y=2x, y=2 and x=0 about (a) the y-axis; (b) x=1 Homework Equations V=∫A(x)dx,a,b The Attempt at a Solution From what my...

well I am not sure how algebraically reduce the quadratic off the top of my head and i haven't missed the point of the substitution identities. the way my class used involves substiutions but with the equations and knowns to make a new equations. And i think it is cool that you found way to do...

you don't really need to use any identities we know that x=xo + Vxo(t) so time = x/Vxo because xo in this problem = 0 and Vxo= VoCosθ so t= x/VoCosθ we also know that y= yo+Vyo(t)-(.5)(g)(t)^2 so plug in t= x/VoCosθ wereever their is time which would look like y= yo+Vyo(...

ok i got this in class. you have to use y= Yo + x(tanθ)-(.5)(g)(x/Vocosθ)^2 for this y=0 x=100 Vo=35 put it in your graphic cal and find the zeroes

Homework Statement You are on the roof of a building that is 150 m tall armed with a tennis ball launcher that fires tennis balls with a speed of 35 m/s. Another building is 100 m away from your building. You are trying to fire a tennis ball into a window of the other building that is 10 m...