Recent content by marcusl

I miss his candor. How many times have we seen a post along the lines of "I'm a physics major at a lower ranked state college with a 2.4 GPA in my major. I have problems with [mental health/laziness/bad study habits/lack of motivation/addiction to video games] but I am set on doing my PhD in...

I Googled Autotune a while back and came across some YouTube videos of famous modern singers with apparently good voices, followed by videos of them caught singing in a casual setting (away from a studio) showing that they can’t carry a tune at all. It’s pretty disgraceful.

Baluncore's comment is a large part of the answer. It is possible to have powerful air currents on the suction side by simply fitting a duct to the inlet. In fact, the usable regions of some of the wind tunnels at NASA Ames are located on the suction side. This includes the 80x120 foot tunnel...

The OP is an instructor asking what SW he should require his students to use.

I work for a large aerospace company and Matlab is almost universally used. Skill in Matlab is a requirement on most engineering job postings here. For reasons of support and security, you won’t find freeware used in industry. The company has a few Mathematica licenses, but I know of only one...

I suggest that you use capitalization and punctuation in future posts. It’s pretty hard to parse your thoughts without them.

There's no R in the formula for power, only for the voltage generated by a resistance. A resistor delivers a power spectral density S=kT W/Hz to a matched load.

I’m confused. Johnson noise at 290K is -174 dBm/Hz or -204 dBW/Hz. How do you get -187?

That app in the previous post has a nice guided tour, with more to come. Here's a link to a short news story with some additional amazing images https://physics.aps.org/articles/v18/122

Measure twice, cut once.

In my experience, it's common for the client to own everything they've paid for without having to acknowledge the source (consultant). The "non-disclosure" part of the NDA's that I've seen and/or been party to expire after a certain time, however, usually five years.

Which is worse?

If the breadth of the road is c, normal to its length, then the breadth b of a bus must also be measured normal to its direction of travel. (Thus b is bus width, not length.)

Do you have a specific question?

You seem to be mixing up concepts that are unrelated. The photoelectric effect is a quantum phenomenon while antennas, signals and filters are classical.