Recent content by Klymene15

Homework Statement "A cylindrical shell of length 230 m and radius 6 cm carries a uniform surface charge density of σ = 14 nC/m^2. What is the total charge on the shell? Find the electric field at the end of a radial distance of 3 cm from the long axis of the cylinder." Homework Equations...

@tadchem: Um... The link only said "It works!" What works, I don't know... @Doc Al: I'm looking to learn how to do it, not simply find an equation.

Homework Statement If the period of a 70.8-cm-long simple pendulum is 1.91 s, what is the value of g at the location of the pendulum? Homework Equations I don't know of any that relate the period, radius and the value of g The Attempt at a Solution The thing is, I'm completely...

Oh! So the horizontal component of the swimmer's velocity is the velocity of the river, and vertical component is the number listed. But how does that connect with the displacement? I figure... Velocity of Swimmer(horizontal)^2+velocity of river^2=total displacement of...

But the problem says "1.4 m/s relative to the water". I figured, since the water is only going horizontally, 1.4 m/s would represent the horizontal component of the swimmer's velocity vector

Wait, just to clarify, 1.4 m/s represents what? The vertical speed (the speed to get across the river) or horizontal speed (the speed along the bank)

Okay. Thanks, cephid. I'm kind of getting it, but not quite. Oh. and displacement is actually 88.2 Thanks for the tip. So. I get the vector addition, but I'm not understanding how I can find the time. I would use the 1.4 m/s times 48 but the velocity's relative to the moving water. Is there...

Homework Statement A swimmer heads directly across a river, swimming at 1.4 m/s relative to the water. She arrives at a point 48 m downstream from the point directly across the river, which is 74 m wide. What is the speed of the river current? What is the swimmer's speed relative to the...

When I said "theoretical" I meant it didn't involve any numbers. Here's a better link: http://photo.goodreads.com/photos/1331679394p8/454140.jpg Please help me! What you posted last didn't help much at all!

Homework Statement What is the relationship between the weight of the hanging washers and the force acting on the stopper by the string? Here is the diagram provided by the book: http://www.goodreads.com/photo/user/5034346-kylaia-formerly-known-as-klymene?photo=454140 It also says to...