technical interviews for high-tech professionals








  • OZ
    In response Granite ball in San Diego... by alex........ yes I've seen something similar...It was a large marble ball resting in a perfectly fitting socket .... suppose the ball weighs 200Kg. and the water pressure is half an atmosphere (very modest), that can exert a pressure of about half a kilo(weight) per square cm. ...so the socket would only need a diameter of about 10cm. to make it float..(water enters at bottom of socket) the cup or socket has to perfectly fit the ball for the water pressure to be transferred to ball