Aball is tossed from an upper-story window of a building. the ball is given an initial velocity of 7.90 m/s at an angle of 23.0° below the horizontal. it strikes the ground 5.00 s later.(a) how far horizontally from the base of the building does the ball strike the ground? 1 m(b) find the height from which the ball was thrown.2your response differs from the correct answer by more than 10%. double check your calculations. m(c) how long does it take the ball to reach a point 10.0 m below the level of launching? 3 s

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