His force can either push the block upward at a constant velocity or allow it to slide downward at a constant velocity. the magnitude of the force is different in the two cases, while the directional angle θ is the same. kinetic friction exists between the block and the wall, and the coefficient of kinetic friction is 0.250. the weight of the block is 47.0 n, and the directional angle for the force is θ = 40.0°. determine the magnitude of when the block slides (a) up the wall and (b) down the wall.

Edward tolman explained the results of his study by theorizing that the rats were learning about the maze during every trial but they a. were agitated because other groups were getting reinforcement b. could not remember how to demonstrate it without reinforcement c. were not motivated to demonstrate it without reinforcement d. seemed to be too lazy to actually work without reinforcement

To understand the electric potential and electric field of a point charge in three dimensions consider a positive point charge q, located at the origin of three-dimensional space. throughout this problem, use k in place of 14? ? 0. part adue to symmetry, the electric field of a point charge at the origin must point from the origin. answer in one word. part bfind e(r), the magnitude of the electric field at distance r from the point charge q. express your answer in terms of r, k, and q. part cfind v(r), the electric potential at distance rfrom the point charge q. express your answer in terms of r, k, and q part dwhich of the following is the correct relationship between the magnitude of a radial electric field and its associated electric potential ? more than one answer may be correct for the particular case of a point charge at the origin, but you should choose the correct general relationship. a)e(r)=dv(r)drb)e(r)=v(r)rc)e(r)=? dv(r)drd)e(r)=? v(r)r

Four friends, a, b, c, and d are standing varying distances away from a speaker which is producing sound waves.