When is thermal equilibrium achieved between two objects?

a. when the particles in one object have more kinetic energy

b. when one objects is hotter than the other

c. when both objects have the same temperature

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.

The earth exerts a gravitational force of 500 n on amy. what is amy’s mass in kg?

Acar travels 40m in 8 seconds find the car speed