A pendulum has a mass of 3.6 kg, a length of 1.8 meters, and swings through a (half)arc of 23.7 degrees. What is its amplitude to the nearest centimeter

Asun-sized star will spend most of its lifetime as a: white dwarf red giant protostar main-sequence star

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.

Decreased sensitivity to an unchanging stimulus is known as