An electron with kinetic energy E = 3.60 eV is incident on a barrier of width L = 0.190 nm and height U = 10.0 eV.

(a) What is the probability that the electron tunnels through the barrier? (Use 9.11 x 10Plugin insertion failed: Plugin failed kg for the mass of an electron, 1.055 x 10Plugin insertion failed: Plugin failed JPlugin insertion failed: Plugin faileds for h bar, and note that there are 1.60 x 10Plugin insertion failed: Plugin failed J per eV.)
(b) What is the probability that the electron is reflected?

Which types of electromagnetic waves have higher frequencies than the waves that make up ultraviolet light? check all that apply. radio waves infrared light microwaves gamma rays visible light x-rays

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.

On a geologic map, if the contacts between sedimentary rock units form a bull’s-eye pattern of concentric circles, with the youngest unit in the center, the underlying structure is a(n)