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Engineering : Recent Questions and Answers (Page 33)

Find answers to your questions about Engineering or help others by answering their Engineering questions.

How to calculate mass flowrate of gas from vacuum pump curve?

Let's assume we have a liquid ring vacuum pump. The pump curve for this pump is plotted as "suction capacity" in m3/hr vs suction pressure in mbar(a). How does one...

Asked on 06/01/2021 by Sergiy Lenzion

0 answer

Do gears make an electric motor bike more efficient?

Electric motor bikes were sold initially on the idea that there would be lesser maintenance and it would remove the requirements of the gears. Now, a lot of people like...

Asked on 05/31/2021 by albseb

6 answer

At which temperature and humidity should outside air be drawn inside?

I have a greenhouse that get’s mold in the winter because it’s to humid. I have now installed a heater and a ventilation system drawing outside air into the greenhouse....

Asked on 05/31/2021 by Tiptop

3 answer

Why is the All-In-Sustaining cost for mining gold so high relative to silver?

The All In Sustaining Cost for mining an ounce of gold at the moment is around $1,000 ; i.e. if gold mines sold gold at around $1,000 an ounce they...

Asked on 05/31/2021

1 answer

Kinetic energy of a balloon

How do I quantify how much kinetic energy would be released from popping a balloon? I believe that any additional kinetic energy that results from the balloon will come from...

Asked on 05/31/2021

1 answer

Differential Equation for: Locking a laser's frequency with a PI controller

I think I have a good understanding of differential equations, so I would like to first try to understand my system in terms of differential equations before transforming my system...

Asked on 05/30/2021

1 answer

What do you call the difference between the on and off temperatures in a simple thermostat?

A simple thermostat will turn on at one temperature and off at a higher temperature. This keeps the thermostat from cycling on and off too quickly. The difference between these...

Asked on 05/30/2021 by ericnutsch

5 answer

How is the simplest Ampere's law formula for cylindrical surfaces?

Current would only flow through the cylinder walls, not inside the cylinder. The cylinder is hollow.I need the formula in order to calculate the magnetic field produced and see...

Asked on 05/29/2021 by Beom

0 answer

Are linear beam element solutions ever exact and when are they used in practice?

In qualifying the results of a Finite Element (FE) beam model, I'm realizing that I dont understand FE beam elements as well as I should. Is there a procedure...

Asked on 05/28/2021 by OnStrike

3 answer

Boundary Layer Thickness for Flat Plate

I did a Civil Engineering course some years ago and from my textbook I had a question on boundary layer thickness.So far I have been able to calculate the...

Asked on 05/28/2021

1 answer

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