Recent content by ThalorB

Check if a magnet is attracted to the stainless steel. If I recall correctly, some stainless steel is non-magnetic (and that's how some people tell the difference in their metal stores).

Having too many variables is likely the point of the exercise. Have you tried picking some approximate values for the initial velocity to find the range wherein it lies? A spreadsheet makes this a relatively simple task.

If i and j are the rows/columns, then what is k? Is there something missing in the problem description?

I am not familiar with the specifics of the 0-4 C temp. range; but, I assume it is for standard temp. and pressure. The expansion/contraction of water has to do with the bond strength between the molecules - dipoles I believe. When water cools to near freezing, the molecules no longer have...

Hello, and welcome to PF. A simple thought experiment may help to clarify this for you. Consider a group of people standing shoulder-to-shoulder and the floor area they occupy. Now, give them sugar (energy) and have them dance to fast-tempo music (~boiling). Consider the floor area they...

Hello, Are your measurements at t=0s or some other time? I would suggest adding a switch to your schematic.

Hello and welcome to PF. Some electronics distributors (Mouser, Jameco, etc.) carry low-cost, low-power, AC-to-AC wall adapters.

Hello, and welcome to PF. I don't really follow your question. I agree with the statement that "only a change of volume, amount of substance or temperature can change the pressure of the air" - PV = nRT! Does the problem state that the sphere's volume doesn't change, or that its made of...

Hello, and welcome to PF. Well, "how big is your pocket book?" I am working with a group that is developing spray-on nanotech coatings for hoses. The resulting structures look like they could provide significant traction on ice. I don't know what pressures they can withstand yet.

Hello. Do you actually need the radii? The two yellow quarter circles appear to be normal to the horizontal and vertical planes. In Solidworks, I would just create points on both sides of the center curve at its ends, and connect those points with a quarter arc. The software would then...

I thought Bernoulli's Principle only applied to flow along a streamline? Anyway, my guess is that there would be a pressure gradient, highest in the rear of the plane for forward acceleration, due to the momentum of the air molecules and relative velocities of the molecules to the aircraft...

I recall reading something not too long ago stating that Einstein was never satisfied with his general theory of relativity because it included a "fudge" factor: I believe it was a cosmological constant. Some have found that calculations considering dark energy can produce that value almost...

I don't know the answer; but, my guess is that the two ends of the wormhole are like the poles of a bar magnet and the "space-time curvature" would be like the magnetic flux lines. Then, the curvature would be "circular" when the distance between the two ends is VERY short compared to the...

Your justification of "less resistance" is a bit hazy. There are less resistors; but, in parallel, total resistance is 1/RT = 1/R1 + 1/R2 + ... +1/Rn. Taking out one parallel resistor is like closing a lane on the highway.

Depending on the type of structure, you would define stiffness with K = F/x, or an "effective" or "apparent" modulus. In the case of the modulus, a "black box" would enclose your structure and you would determine the properties of that "box," e.g., the cross-sectional area of the box when...