Hai phòng có kích thước bằng nhau, thông với nhau bằng một cửa mở. Tuy nhiên, nhiệt độ trung bình trong 2 phòng được duy trì tại các giá trị khác nhau. Vậy trong phòng nào có nhiều không khí hơn?

What is relative velocity? in which condition is relative velocity known by adding the velocity of the first body and that of the second body

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.

When is a current produced? when the terminals of an electrochemical cell are connected by a wire if the electric circuit is opened in an electrochemical cell if the electrolyte is removed from an electrochemical cell when the electrodes are reversed in an electrochemical cell