Engineering materials plz answer whatever you can Diffusivit

Engineering materials

plz answer whatever you can

Diffusivity of Ni in Cu depends on Temperature Time Both temperature and time Neither temperature nor time Diffusion will take place from Highly concentrated regions to lightly concentration regions Lightly concentrated regions to highly concentrated regions High temperature regions to low temperature regions Low temperature regions to high temperature regions Fick\'s first law involves Concentration gradient, activation energy, temperature and lime Concentration gradient, activation energy, and temperature Concentration gradient and activation energy None of the above If Al is bonded to Au at an elevated temperature, the aluminum ate faster into the Au than Au atoms diffuse into Al. Consequently int Moves toward Al side Moves toward Au side Remains unchanged First moves toward Al Diffusion coefficient of C in steel at 1000 Degree C is 2.97 times 10^-7 cm^2/s 0.2299 cm^2/s 2.838 times 10^-6 cm^2/s 5.16 times l0^-7 cm^2/s A carburizing process is carried out on a 0.2%C steel by intro surface at 1200 Degree C. What is the carburization time if the carb beneath the surface is 0.737% (Diffusivity of C in steel at 12 cm^2/s 92.6h 31.9 h 1186 h 161.8 h A 0.001 in. BCC iron foil is used to separate a high hydrogen low hydrogen content gas at 650DegreeC. 5times10^8 H atoms/cm^3 a side of the foil, and 2 times 10^3 H atoms/cm^3 are in equilibrium the concentration gradient of hydrogen through

Solution

1. Diffusivity of Ni in Cu depends on temperature.
   Answer: (A)

2. Diffusion will take place from highly concentrated regions to lightly concentrated regions.
   Answer: (A)

3. Fick\'s first law involves concentration gradient, activation energy and temperature.
   Answer: (B)