The rigid bars a c and e d b are pinned to a wall at a and e , respectively, and pinned together at b . bar a c is subjected to a triangular distributed load with w = 4 k n / m . consider the following dimensions: a = 680 m m , b = 85 m m , c = 510 m m , d = 170 m m and l = 1699 m m matlab input: a = 680; b = 85; c = 510; d = 170; l = 1699; w = 4; determine the reaction force at pin a , r a . input the reaction as vector components according to the included coordinate system.'

The two metal spheres in the figure are connected by a metal wire with w switch in the middle. initially the switch is open. sphere 1, with the larger radius, i'd given a positive charge. sphere 2, with the smaller radius, is neutral. then the switch is closed. afterward, sphere 1 has charge q1, is at potential v1 and the electric field strength at its surface is e1. the values for sphere 2 are q2, v2, and e2. a. is v1 < ,> , or = to v2? explain. b. is q2 < , > , or = explain? c. is e1 < ,> ,or = to e2? explain?