Acharge -364e is uniformly distributed along a circular arc of radius 6.10 cm, which subtends an angle of 56o. what is the linear charge density along the arc? (b) a charge -364e is uniformly distributed over one face of a circular disk of radius 4.70 cm. what is the surface charge density over that face? (c) a charge -364e is uniformly distributed over the surface of a sphere of radius 5.00 cm. what is the surface charge density over that surface? (d) a charge -364e is uniformly spread through the volume of a sphere of radius 4.10 cm. what is the volume charge density in that sphere?

The base of a 50-meter tower is at the origin; the base of a 50-meter tree is at (0, 50, 0). the ground is flat and the z-axis points upward. the following parametric equations describe the motion of six projectiles each launched at time t = 0 in seconds. (i) r (t) = (50 + t2)k (ii) r (t) = 2t2 j + 2t2k (iii) r (t) = 50 i + 50 j + (50 − t2)k (iv) r (t) = 2t j + (50 − t2)k (v) r (t) = (50 − 2t) i + 2t j + (50 − t)k (vi) r (t) = t i + t j + tk (a) which projectile is launched from the top of the tower and goes downward? at time t = , the projectile hits the ground at point (x, y, z) = . (b) which projectile hits the top of the tree?