Which of the following statements is true about the projectile motion of an isolated system? a. The kinetic energy of a system increases, then decreases during projectile motion.
b. The center of mass motion of a system is unaffected even if the system breaks apart.
c. The momentum of an object in flight is conserved during projectile motion.
d. It is not possible to predict the center of mass motion of the system if it breaks apart.
e. The momentum of each part of a system is separately conserved during projectile motion

Rohit is trying to tune an instrument

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

To fully describe the photoelectric effect, scientists must consider which of the following to be quantized? o a. both light and matter o b. matter only o c. light only o d. neither light nor matter