Oh. I have a BS in Physics with a math minor so it could have been in either subject.

I did take linear algebra but also did a lab once with standing waves of sand. Resonate frequency stuff. Cool. Yeah, I'm an old geek.

 

It's pretty much ALL about resonant frequency. Engineering disciplines are separated only be the frequency of the oscillation...

Chem: very slow (titrations)
Civil: slow (geo perturbations)
Mech: medium (mech vibrations)
Electrical: fast (electrical oscillations)
Nuclear: very fast (nuclear movement)



The washboard is caused by a mechanical wave feedback loop.

 

hEY Patty welcome to my tread

:makesnote2pickupalidosumtin4her:

 

So I kinda tried with the basketball but its a lil flat so I think it dint work rite or I just focked up

 

If you have too much haze it won't work since you'll have light coming from every direction (bouncing off the haze). Don't sweat it, they'll be another sunny day in WA... in a couple of months.

 

https://www.s2ki.com/forums/index.ph...&f=86&t=502149

 

cant find it

maybe its not dark enough

 

It's probably 'new'.

 

Nearly new today. New on the 14th. You'll see it very early in the morning just before sun up. Just the tiniest of slivers.

 

well I couldnt see it last nite either and it wuz kinda creepy not being able to find it
doubt I'll see the sliver on Sat due to

did see lots of 's last nite though maybe we need a look at the 's tread sep doubt we can all see/recognize the same ones as easily less its like one of the dippers