# All Questions

50 views

### How might I show that an operator is, by definition, an 'observable'? [on hold]

Here is my problem: I understand what is meant by 'observable' but don't have a formal definition at hand. How do I 'show' it?
21 views

56 views

### If a liquid is compressed enough, would it become solid?

If a liquid were to be compressed so tensely that the particles had no room to move, would it then become a solid? Also, would the same happen with a gas?
9 views

### Looking for full equation for radar cross section of corner reflector

There's a well-known formula for the RCS of a corner reflector (aka corner cube), to wit $\sigma \varpropto \frac{L^4}{\lambda^2}$ . I've found several sources which cheerfully say "...valid for \$ ...
8 views

### Increased pressure of Liquid Pitch and Limestone (Bitumen/Asphalt) @ approximately 300 degrees Fahrenheit

If liquid pitch and limestone (20/80 mostly limestone) is pumped (appx. 5 gpm) out of a nozzle that restricts the flow compared to the flow that would be achieved straight out of the pump ( no ...
21 views

### PM-IRRAS Equidistant Fringes in Spectrum

What is the cause, and best method to prevent / minimize, fringes in one's FTIR (PM-IRRAS) spectrum on samples deposited on a thin metal film? The fringes look as though they are spaced out by a ...