Recent content by mink_man

LEV needs to be at 1m/s at the face. Let’s say area of LEV is .1 m2 What size plate (with holes or not in it) and weight is needed for the plate to fall off if the face velocity is less than 1m/s but the velocity is enough to keep the plate on the lev face if the speed is 1m/s or greater. I...

also its asked to prove shear strain, ill use this symbol for it. ω it asks to prove τxy (tau xy) = (E/1-v^2) [((1-v)/2) (ωxy)] given ωxy = 1/G (τxy) Any help? :(

I still don't understand where the E/1-v^2 comes from.

How does the first step transform into the second step. I have no idea :(

thanks for the reply. I'm not sure if I have the thermal resistance figs, they may be given. But, the study is comparing different types of floor. -timber floor concrete floor - no insulation concrete - 80mm insulation concrete - 250mm insulation :)

Homework Statement 4. ANALYSIS The Excel Data File will allow the following analysis to be conducted for both emitter types: a) Calculate the variation in both the temperature drop across the emitter ( T) and total heat emitted (Q) over the entire test period for each of the 3...

I = current and the voltage stays the same in a parallel circuit

Thanks for your reply, but I think you misunderstood. We're just running a lab experiment to show how a variable speed drive saves money. We want to run an AC pump at full throttle, then put a restriction in the pipe to reduce mass flow rate. Then we'll run the VSD at a lower speed with no...

Homework Statement We'll be running a vsd water pump. We'll be seeing the energy savings of using a vsd, instead of using an AC motor on full load and using a tap to reduce water flow. Sorry for the lack of info. The Attempt at a Solution I'm sure it will have something to do with...

Thank you :D

Homework Statement No attempt done, just looking for any books or online sites that could help in solving these. They're likely to come up in my exam and am studying for other exams at the min.

It's all about forces and stresses, lots of maths.

Mechanical is quite interesting

They're not acting along the same axis.

sorry, the q is in m3/hr, so it would be .0055 l^3 / second. The aim is to design the screw, work out the forces and design the thickness of the shaft etc. Maybe this is the wrong forum. The efficiency of an archimedes screw is 84%. The main aim is to design a system that aerates a...