What is the magnitude of the gravitational force of attraction be- tween two asteroids in space, each with a mass of 50,000 kg,
separated by a distance of 3800 m?

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.

How many atoms of nitrogen are in the chemical formula ni(w on

For most stars, what does a higher temperature tend to to with? a lower luminosity a higher luminositya red color none of the above