What is the kinetic energy of a 24 kg mass that is moving with a velocity of 3.5 m/s?

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.

Most of the volume of an atom is occupied by the

Which compound is held together by the electrostatic force between two ions? a. co2 b. cci4 c. h2s d. mgf2