Posted by rosan on Friday, November 8, 2013 at 6:40pm.
Four charges are arranged at the corners of a regular tetrahedron (a pyramid with four sides that are identical equilateral triangles). The charges are 1 Coulomb each, and the sides of the tetrahedron are all 1 meter. How much energy in Joules is required to assemble this arrangement of charge

Physics pls anyone can help me? its urgent  bobpursley, Friday, November 8, 2013 at 9:44pm
Simple. What is the Potential energy of each charge? Well, PE is a scalar, so the distances are the same to each charge, so
energy=k(q1Q2/r+Q1Q3/r+Q1Q4/r+Q2Q3/r+Q2Q4/r+Q3Q4/r)= 6k if all q are 1, all r is 1.
Now consider putting the thing together.
first charge, no energy
second charge, energy= kQq/r=k
third charge, energy= 2k
fourth charge, energy=3k
total work: 6k

Physics pls anyone can help me? its urgent  ss0, Monday, November 11, 2013 at 10:00am
what is k?
Answer This Question
Related Questions
 physics  Four charges are arranged at the corners of a regular tetrahedron (a ...
 Physics Important please  Four charges are arranged at the corners of a regular...
 physics  The figure below shows four charges located at the corners of a square...
 physics  The figure below shows four charges located at the corners of a square...
 Physics  Four identical point charges of q = 4.64 nC are at the four corners of...
 electricity and magnetism  Four equal point charges, +3micro coulomb, are ...
 Physics  Four identical 12µC charges are placed at the corners of a square of ...
 Calculus  Pyramid  A pyramid with a square base and four faces, each in the ...
 physics  Four charges are placed at the four corners of a square of side 15 cm....
 physics  Four charges are placed at the four corners of a square of side 15 cm...
More Related Questions