A bowling ball weighing 25 N is dropped off the top of a 11 m tall building. What is the potential energy with respect to the ground when it has fallen half the height of the building? a. 25 J b. 2.8 x 102 J c. 11 J d. 1.4 x 102 J

Explain the consequences of this addiction to the brain tissue

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.

Positrons are spontaneously emitted from the nuclei of