Recent content by GT1

If in one case the mass of the cylinder is 100kg and in the second case the mass of the cylinder is 10kg and I'm pressing it at force of 90kg, in both cases it feels like the cylinder mass is 100kg. What is the intuitive reason why in one of the cases it will be more difficult to accelerate the...

No. Real life question..

Two rotating cylinders are held in contact by a force F1. The force is applied through the center of one of the cylinders. One cylinder is the driving cylinder and the other is the driven cylinder . Does the moment of inertia of the system depends on the force contact force F1? Why? And...

And if we have an electric car driving at partial vacuum? -the Reynolds number stays the same. and what about the boundary layer thickness?

How does low ambient pressure effect on the thickness of the boundary layer for given flow conditions of gas? In absolute vacuum the thickness of the boundary layer is 0 of course, but it seems that all the boundary layer thickness correlations use the Reynolds number, which doesn’t change much...

I'm want to design a device that uses Electroactive polymer. Do you know design companies that have experience with Electroactive polymers? Do you know manufacturers of Electroactive polymers?

A friend of mine told me that he was really worry to hear it because if nothing has happened so far, there is higher risk that it will happen now (and even higher the next day..) And then we started argue about it.. How can i prove it is not true?

You are going to do skydiving at the first time in your life. A friend tells you that the skydiving club you are going to never had any accidents in the past 20 years. Do you need to worry more or less when you hear it? Why?

I have a sealed syringe with air at known pressure P1, temperature T1 and volume V1. at some time I increase the volume of the syringe to V2, what will be the temperature T2 and pressure P2 at volume V2, right after the system reach to volume V2? The volume change process is relatively fast...

What are proximal/distal displacements of stents and what is causing it?

I'm asking about a real world problem - the sound sources and the detector have finite dimensions. What is the sound intensity very close to point A? Why?

If two sound sources (A, B) are placed in a water tank and emit sound waves at the same frequency, phase and amplitude, if I measure the sound intensity at point A, will the detected signal will be ~double than the emitted signal of each sound source? I think that the answer is yes because of...

You can add a bend to your "shelf" and then connect it to the main body with screws, I usually prefer to avoid welding for connecting different parts like yours. I think that the best (and cheapest) option is to redesign this part as a single piece sheet metal part.

Why does the normal force is always a bit less than the gravitational force?

How do fins stabilize the rocket's flight?