Coffee Mug Makes Strange Noise

This is my coffee mug. When I make coffee and pour in hot water, it starts making this noise. Sounds like it's crying. 😄


 

The Future of Air Travel?

Good morning, ladies and gentlemen.

Congratulations for being the first passengers of Auto Airways.

Right now, we are cruising at Mach 3 at an altitude of 60,000 feet. Faster and higher than any piloted passenger aircraft.

Yes, ladies and gentlemen. This flight is the first for a fully-computerized passenger aircraft. What that means is, this aircraft doesn't have any pilots.

But no need to worry, this aircraft has all the latest in computer design and programming. You are all safe.

Nothing can go wrong...go wrong...go wrong...go wrong...go wrong...kzzzt.

How to Avoid/Reduce Feedback in Sound Systems

Principal cause of acoustic feedback Most, if not all, of us have experienced hearing that piercing whistle from sound systems. What cause...