hallo all,
I was wondering the following thing: when using a He-Ne laser, you pump some energy in the system to get the He excited, but why only the He atoms?
If you pump energy in the systems, wouldn't the Ne atoms get excited too ? (and I am not speaking about them getting excites because...
hallo, I found this problem at another forum and I got intrigued by it:
Imagine a flute and violin.
You play a a musicnote on it , a sol. You will get several overtones.
Now when doing this the sound of the overtones will diminish (the volume goes down) when using the flute, however...
hallo all,
while reading some info on soundwaves and overtones I found the following statement on wikipedia:
"The first overtone is the first allowed harmonic above the fundamental frequency (F1).
In the case of a system with two different ends (as in the case of a tube open at one end)...
coming back on the reactive tank armor:
could you say that the explosives on the tank react as a sort of negative interference? You have the shockwave of the granate (impact) and you have the shockwave of the explosives. They work against each other, the explosives on the tank are there to...
Someone told me that when you hit someone 2 times very fast in a row: the person will die just because you have positive interference and the waves will strengthen each other causing leathel injuries.
the body will not be able to cope with such wave, vibration.
ok , but still: is this based...
hallo all, I was wondering if you were able to help me with the following:
I am wondering about how body armor works exactly and have checked some sites, but still strugle with some questions.
As for know I have the following: when a bullet hits a body, then you have injuries caused by the...