A-5.0 μc charge experiences a 11 i^ n electric force in a certain electric field. [recall that i^ is a unit vector in the x-direction.]
1. what force would a proton experience in the same field?

When an object is heated it contracts. a. true b. false

Asheet of steel 1.5 mm thick has nitrogen atmospheres on both sides at 1200oc and is permitted to achieve a steady-state diffusion condition. the diffusion coefficient for nitrogen in steel at this temperature is 6 x 10- 11 m2 /s, and the diffusion flux is found to be 1.2 x 10-7 kg/m2 -s. also, it is known that the concentration of nitrogen in the steel at the high-pressure surface is 4 kg/m3 . how far into the sheet from this high-pressure side will the concentration be 2.0 kg/m3 ? assume a linear concentration profile.

Why does lightning travel from clouds to the ground?