Engineering Questions, Problems & Solutions : TransWikia.com ~ Page 19

Force necessary to resist motion due to torque on a drum brake

A drum is subjected to a counterclockwise torque of 16 in-lb. What horizontal force is necessary to resist motion? Coefficient of friction = 0.40 Weight is neglected. ...

Asked on 07/23/2021

0 answer

Delivering RPM from a fixed wheel to a moving wheel

I have spent the past few days thinking about a good way to get power/RPM from a fixed wheel delivered to a wheel that is able to move in a...

Asked on 07/23/2021

1 answer

Durability & air-tightness of PUR tube on barbed air port

I'd like to connect a long tube to a pressure sensor with a barbed port to measure air pressure (ambient air pressure +-10kPa). The sensor's barbed port has outer diameter...

Asked on 07/22/2021 by user199309

0 answer

Why were engineers negligent in the 1981 Hyatt Regency walkway collapse?

I was recently reading up on the 1981 Hyatt Regency walkway collapse. It was a tragic loss of life and haunts many to this day. The linked...

Asked on 07/22/2021

4 answer

Big Beam LVL or Glu Lam load capacity to support a gymnast

I need help knowing if I am selecting the correct wood beam. The load will be all near the center and a 250 pound man will be doing pull ups...

Asked on 07/21/2021

1 answer

incompressible fluid approximation and fluid vs sound velocity

consider the following case:A straight tube, with a constant mass flow rate of water $dot m_{in}=dot m_{out}$ , and with a linear power entering in it $dot...

Asked on 07/21/2021

2 answer

Program name of this buckling modeling

My instructor sent this solving with program that I don’t know the name , does anyone know the name of the program ? ...

Asked on 07/21/2021 by Razi Awad

0 answer

Reduce high pitched noise from idle stepper motor

I have the following setup: Stepper motor: Bipolar, 200 Steps/Rev, 42×38mm, 2.8V, 1.7 A/Phase - https://www.pololu.com/product/2267 Diver: DRV8825, with current limiter VREF = 0.85v - ...

Asked on 07/20/2021 by Jack Campbell

1 answer

Does a photon impart energy on a surface (to raise its temp) if it goes THROUGH that surface?

Hi so I have this senior design project involving cooling human skin as it is irradiated by an infrared LED. Human skin not only is super absorbent to IR, but...

Asked on 07/20/2021 by MeowMix

1 answer

What is the current limiter for SEPIC LED driver?

I have designed an LED driver with SEPIC converter for 220 volts line. I hear starting current for 3 or 4 cycle is very high in the branch of...

Asked on 07/19/2021 by fouzia

1 answer

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