A charge of #2 C# is at the origin. How much energy would be applied to or released from a # -1 C# charge if it is moved from # (3 ,7) # to #(8,2 ) #? Physics Electrical Energy and Current Coulomb's Law 1 Answer ali ergin Feb 9, 2016 #Delta E~=-4,452*10^9 " J"# Explanation: #"distance between origin and the point(3,7) is:"# #r_1=sqrt((3-0)^2+(7-0)^2)# #r_1=sqrt 58# #"distance between origin and the point (8,2) is:"# #r_2=sqrt((8-0)^2+(2-0)^2)# #r_2=sqrt 68# #E_1=(k*2*(-1))/sqrt 58# #E_1=(-2*9*10^9)/sqrt 58# #E_1~=-2,362*10^9 " J"# #E_2=(k*2*(-1))/sqrt 68# #E_2=(-2*9*10^9)/sqrt 68# #E_2~=-2,18*10^9 " J"# #Delta E=E_2-E_1# #Delta E=-2,18*10^9-2,362*10^-9# #Delta E~=-4,452*10^9 " J"# Answer link Related questions How does one Coulomb of charge compare with the charge of a single electron? What is Coulomb's law? Is the force between two point charges directly proportional to the magnitude of each charge? How does the gravitational force exerted by a proton on an electron compare to the gravitational... How does the electrostatic force exerted by a proton on an electron compare to the electrostatic... Two equal charges of magnitude 1.1 x 10-7 C experience an electrostatic force of 4.2 x 10-4... Two balloons are charged with -0.0025 C each and held apart at a separation distance of 8 m.... Will two point charges, each with a charge of +1 Coulomb and separated by a distance of 1 meter,... What is the electrical force of attraction between two balloons with separate charges of +3.5 x... At what distance of separation must two 1.00-microCoulomb charges be positioned in order for the... See all questions in Coulomb's Law Impact of this question 994 views around the world You can reuse this answer Creative Commons License