Test # 77
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In china, there are more people who speak english than in the usa. .. More >>
water gauge:
n.
1.gauge for indicating the level of water in e.g. a tank or boiler or reservoir .. More >>
n.
1.gauge for indicating the level of water in e.g. a tank or boiler or reservoir .. More >>
Science Experiments Ideas
Match lift
It is simple, using air, to lift matches from the table into their box. Hold the case between your lips and lower it over the matches. Draw a deep breath, and the matches hang on to the bottom of the case as though they were stuck on.By drawing in breath you produce a dilution of the air, in the case. Air pressure pushes the matches from underneath towards the opening. Even a single match can be raised in this way, if the air is drawn in sharply.