On a level ground a shell is fired with an initial velocity of 80.0 m/s at 60.0 degrees above horizontal and feels no appreciable air resistance. (a) find horizontal and vertical components of shell's initial velocity. (b) how long does the shell take to reach its highest point? (c) find its maximum height above ground. (d) how far from its firing point does the shell land? (e) will the shell clear a 160-m tall mountain located at a horizontal distance of 235.0 m from the firing point

Athin nonconducting rod with a uniform distribution of positive charge q is bent into a circle of radius r. the central perpendicular axis through the ring is a z-axis, with the origin at the center of the ring. a) what is the magnitude of the electric field due to the rod at z = 0? n/c (b) what is the magnitude of the electric field due to the rod at z = infinity? n/c (c) in terms of r, at what positive value of z is that magnitude maximum? r (d) if r = 4.00 cm and q = 9.00 µc, what is the maximum magnitude? n/c