The top of lake is frozen as atmospheric temperature is -10 degree celsius the temperature of the bottom of the lake is most likely to be? ?
give the answer in degree celsius..
the options are:
-4°
0°
4°
-6°

Which of the following are considered noble gases? a. bromine b. neon c. argon d. chlorine

An object's buoyant force and weight mean the same thing.a. trueb. 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.