An electric dipole, consisting of charges each of magnitude 2.11 nC and separated

54*10^-13 J

Explanation:

given:

charge =2.11 nC

distance=8.37*10-6

electric field intensity=1578 N/C

solution:

dipole moment magnitude=q.2a

                                            =2.11 nC*2*8.37*10-6

                                            =18*10^-15

potential energy of dipole = -P*E

                                           = -P*E*cos Ф

for parallel orientation, Ф=0

potential energy = -18*10^-15*300*cos 0

                             =-54*10^-13 J

for perpendicular orientation, Ф=90

potential energy = -18*10^-15*300*cos 90

                             =0

           difference =0-(-54*10^-13 )J

                            =54*10^-13 J

A chemical change results from a chemical reaction, while a physical change is when matter changes forms but not chemical identity. Examples of chemical changes are burning, cooking, rusting, and rotting. Examples of physical changes are boiling, melting, freezing, and shredding. Often, physical changes can be undone, if energy is input.

Explanation: hope this helps have a good day