Recent content by Dave_

The coverage of a physisorbed gas, q, is related to it’s pressure P in atmospheres and the equilibrium constant (hint) for adsorption K by the equation: q = KP/(1 + KP) Re-arrange the equation to give an equation of the form y = mx + c such that K can be obtained from the slope of a plot of y...

I'm currently in my first week of undergrad chemical engineering and was set these questions to answer, so any help or any pointers will be greatly appreciated. Thanks. a) 32000 kg/hr + 5000 kg/hr = 37000 kg/hr b ) (The question is meant to be 0.05kg) 37000 * 0.05 = 1850 kg/hr c) I'm not...

Ahh I see, so should I be calculating (12.5 / 10001/2) = 0.395 MPa.m1/2? Thanks!

I've just doubled checked and the 1/2 exponent is correct, the value is a material constant. Is it possible to convert it into MPa.m1/2? Thanks.

Using the Hall-Petch relation, estimate the yield strength, σy, of a Cu-Zn alloy (brass) when the average grain diameter is 30 μm. where: σy = is the yield strength σ0 = 25 MPa is the internal friction stress ky = 12.5 MPa·mm1/2 is a material constant d = is the average grain size...

I need to convert 12.5 MPa·mm1/2 into MPa.m1/2. I am unsure on how to do this, my two guesses are as follows: 1. (12.5) / ( 1 / 10001/2) = 395.28 MPa.m1/2 2. (12.5) / (12.5 / 10001/2) = 31.62 MPa.m1/2 Is either of those correct? Thanks!

I have a cylindrical steel sample tested in tension. It's cross-sectional area is 500 mm2. I am also told that: Force at yield = 205 kN Maximum force = 258 kN Force at fracture = 200 kN I am asked to calculate the yield stress, ultimate tensile stress and fracture stress if the reduction of...