Density, density, density.(a) a charge-304e is uniformly distributed along a circular arc of radius 6,70 cm, which subtends an angle of 519. what is the linear charge density along the arc? (b) a charge 304e is uniformly distributed over one face of a circular disk of radius 2.80 cm. what is the surface charge density over that face? (c) a charge-304e is uniformly distributed over the surface of a sphere of radius 4.20 cm, what is the surface charge density over that surface? (d) a charge-304e is uniformly spread through the volume of a sphere of radius 4.90cm. what is the volume charge density in that sphere?

Ablock of mass m = 2.5 kg is attached to a spring with spring constant k = 710 n/m. it is initially at rest on an inclined plane that is at an angle of θ = 23° with respect to the horizontal, and the coefficient of kinetic friction between the block and the plane is μk = 0.19. in the initial position, where the spring is compressed by a distance of d = 0.16 m, the mass is at its lowest position and the spring is compressed the maximum amount. take the initial gravitational energy of the block as zero. a) what is the block's initial mechanical energy? b) if the spring pushes the block up the incline, what distance, l, in meters will the block travel before coming to rest? the spring remains attached to both the block and the fixed wall throughout its motion.

Aperson walking 1 mile everyday for exercise, leaving her front porch at 9: 00 am and returning to her front porch at 9: 25 am. what is the total displacement of her daily walk? a) 1 mileb) 0c) 25 minutes d) none of the above

Choose all the answers that apply. our solar system: is in a spiral galaxy no longer includes pluto is made mostly of empty space is in the andromeda galaxy is the only known system that supports life