Recent content by Roger900

Would a difference be resulting from the effective area differences for each individual coil loop? If we look at a single helical coil of the spring, the outer diameter is obviously larger than the inner diameter. Hence, the outer diameter, or edge of the helical coil is physically in...

Two engineers are disagreeing on the following issue. Can anyone assist in providing a 3rd opinion? The question relates to the force required to compress a simple helical compression spring. Assume a compression spring is resting on a work table in absolute pressure of approximately...

Thanks for your ideas and comments Hootenanny, Q_Goest, billiards, FredGarvin and KingNothing. This has helped me a lot. Roger.

Hello Physics Masters! I would like to calculate pressure drop values caused by friction as water flows through a a smooth pipe at different velocities and different internal pipe diameters. I ONLY want the pressure drop values caused by friction, not the pressure drop values caused by...

How does elasticity change in a high water pressure environment? For example, assume you drop a common rubber band in the ocean. As the rubber band sinks, water pressure increases on the rubber band. Excluding any change in temperature of the rubber band, how does the elasticity of the...

Thank you Claude for taking the time to answer my question. I appreciate your knowledge. Roger

Hello Physics Specialists, I am having some difficulty understanding the Work Equation with respect to the Cosine Theta portion of the equation. Work = Force * Distance * Cosine(theta) Attached is a picture of two hypothetical mechanical devices. I understand how to calculate work...

I should have clarifed...that the piston is locked and cannot move when the vacuum is drawn on the cylinder chamber. Then, the valve to the vacuum pump is closed, leaving the 95% vacuum in the cylinder. Now, if the piston is unlocked, can the piston be depressed any amount to compress the 5%...

If a cylinder has a closed, sealed end, and the other end is a piston, and a 95% vacuum is drawn in the cylinder between the sealed end and the piston head, can the piston be depressed to "compress" the vacuum? Can the remaining 5% of air in the cylinder be compressed in any compression amount?

Let's assume (1) the surface area of each piston is one square inch, (2) the piston seals have a 100 PSI rating, and (3) a 95% vacuum exists in the cavity which is equal to (0.95 * 14.69 PSI) = 13.95 PSI. Here is where I get confused: If each piston is receiving a vacuum of -13.95 PSI...

Hello Specialists in Physics! Way back in 1657, von Guericke in Madeburg Germany demonstrated the tremendous force of atmospheric pressure by placing two large hemispheres together, evacuating the air from inside, and hitching a team of horses to each hemisphere. The horses were unable to pull...