What is the ultra sonic?

Question:


Answers:

How much does the average jumbo jet weigh compared to that of a military tank?

Any sound frequency beyond the range of human hearing.

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What is it called?

when the hedge hog moves really fast!
or very small vibrations used to clean gold ect!

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Small Dog in aircraft cabin?

Ultra Sonics are often used for NDT (Non-Destructive Testing). By sending an Ultra-sonic signal into a metal surface we listen for it to reflect from impurities. This reflected signal or lack of a signal tells us what is going on inside an a/c component.
This is a simplified description of an advanced technique. for more info try going to this site:

How much, on average, does the annual maintenence for single engine aircraft run?

http://www.tubi-tak.com/ultrasonic_inspe...

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Red arrows break-up?

In relation to aircraft, you may be thinking of hypersonic, which in general can be described as "lickety-split" (I think it's 3X the speed of sound, may be higher. Anyone? I'll search too.
Seems to be agreed it's 5 times the speed of sound, see link:

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Private pilot certifitcate- written test?

look in the dictionary

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