Athin walled tube is carrying hydrogen gas at a concentration of 3 kg/m^3. if the pipe wall is 6 mm thick and the diffusivity of hydrogen in the pipe material is 4.5x10^-5 m^2/s. a. what is the rate of loss (flux) of hydrogen to the outside atmosphere by diffusion through the wall? b. how much hydrogen will escape in 24 hours if the pipe is 21mm in diameter and 24 meters long?

When drawing a v& m diagram .. select one: 1)- a, a distributed load produces a step change in the shear diagram. 2)- b. a concentrated moment produces a step change in the shear diagram. 3)-c. a point load produces a step change in the moment diagram. 4)- d. a point load produces a step change in the shear diagram. 5)-e. a distributed load produces a step change in the moment diagram.