TEN LITTLE FINGERS - Arvind Gupta

AIRThese simple experiments are fun to do. In each of these experiments whenever you blowair, its high speed creates a low-pressure zone, which makes things either come close orrise up in the air.Take a strip of card 50-cm long and 5 cmwide. Cut a window in its middle and bendits two legs to make it stand like a table.On blowing through the window both thelegs of the paper table come close together.Can you remove a table - tennis ball from a glasswithout physically touching it ?Yes you can. Blow hard towards one wall of theglass and the ball will be ejected out of the glass.Take a thin strip of paper and hold it inthe gap between the thumb and theindex finger. Then bring the thumb closeto your mouth and blow horizontally.The strip will rise and float in the air.You can also tape the paper strip to theend of a plastic straw and blow through it.The strip will rise up and float horizontally.25-cm10-cm5-cm10-cmTape two light plastic balls to the ends of a 25-cm long thread. Tape a 5-cm longpaper strip in the middle to keep die balls apart. Hang the balls and use a plasticstraw to blow air between them. The balls will come close and strike each other.