A point in the electric field of two different charged particles is 300 cm from the negatively charged particle, and 600 cm from the positively charged particle. The charge of the positive charge is 6 nC, the charge of the negative charge is -3 nC. What is the strength of the electric field at the point of measurement? * 1 point
-1.5 N/C
-5.2425 N/C
-1.49 X 10^-4 N/C
1.5 N/C

Aparticle of mass m is placed in a one-dimensional box of length l. the box is so small that the particle’s motion is relativistic, so that e p2/2m is not valid. (a) derive an expression for the energy levels of the particle using the relativistic energy–momentum relation and the quantization of momentum that derives from connement. (b) if the particle is an electron in a box of length l 1.00 1012 m, nd its lowest possible kinetic energy. by what percent is the nonrelativistic formula for the energy in error?