Apolycrystalline solid: (a) is amorphous (c) is usually anisotropic (b) contains grain boundaries (d) none of these 2. the atomic diameter of an fcc crystal (lattice parameter a) is a2 (c) (b) a2 (d) (1 10) 3. draw the plane whose miller indices are 4. using bohr model of the hydrogen atom, find the largest wavelength of emitted photon when the electron of the hydrogen atom rehurns to its 3 excited state

How would doubling the made of an object change the objects potential energy

If a substance is in the gas phase, which of qualities of the gas will stay constant? a: volume b: mass c: shape d: position of particles

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.