Recent content by PinkFlamingo

I'm sorry for posting so often, but I'm really stuck on these :cry: A cannon having a muzzle speed of 1000 m/s is used to destroy a target on a mountaintop. The target is 2000 from the cannon horizontally and hoom above the ground. At what anle, relative to the ground, should the cannon be...

A rifle is aimed horizontally at the center of a large target 200 m away. The initial speed of the bullet is 500 m/s. Where does the bullet strike the target? To hit the center of the target, the barrel must be at an angle above the line of sight. Find the angle of elecation of the barrel. So...

A ball is throw horizontally from the top of a building 35 m high. The ball strikes the ground at a point 80 m from the base of the building. Find the ball's initial velocity. What I have done so far is to find the time it takes for the ball to reach the ground, using the x=V0t + 1/2 at^2...

Would the answer to c be 0 as well, since the total charge is 0, the flux must be 0 too right?

Would the answer to a AND b be 0 because they're both within the conductor?

I'm also stuck on this one. Could someone help me please? :confused: An insulating, thin, hollow sphere has a uniform surface charge density, a. a) show that the magnitude of the electric field at the surface of the sphere is |a|/E0 (where E0 is the permittivity of free space) b) a...

A small copper spherical BB of radius a is located at the center of a larer hollow copper spherical shell of inner radius b and outer radius R. A charge of +q is on the small BB. The hollow copper shell has zero charge on it. a) What is the electric field within the BB (for radii r<a)? b)...

Hi there, I was hoping that somebody could help me. I'm stuck again! :cry: a rod with (lambda) coulombs of charge per meter of its length has the shape of a circular arc of radius R. The rod subtends an angle (theta). Shpw that the magnitude of the electric field at the centre of the...

ok I figured it out! Thanks for your help! :biggrin:

I'm sorry... I'm still lost. I have no idea how to do any of that. How do you take the derivative if you don't know the value?

Hi there, I was hoping that someone would be kind enough to help me out with this question. I don't even know where to start Use T=Ia (where T=torque) to show that if an electric dipole with dipole moment of magnitude p and moment of inertia I is oriented with its dipole moment making a...

Thank you!

Two small, identical, point-like conducting spheres have charges q1=-2nC and q2=6.00 nC, The two spheres are brought momentarily into contact and then separated by a distance of 3.00 cm. Now what is the magnitude of the electrical force on each? Are the forces now attractive or repulsive?

If you have two charges, one positive and one negative, you can find the electrical force using coulomb's law. What happens to the charges if you touch them together and then separate them again? Do they become like charges, and does the magnitude change? Thanks Mandy :confused:

So how would I find the angle for the two I posted?