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Holding water in a sieve
Pour some oil over the wire mesh of a kitchen sieve and shake out the overload so that the holes are open. Cautiously pour water into the sieve from a pitcher, letting the water run down the side of the sieve. When the sieve is about half full, hold it over a sink or pail and observes the bottom. You will see the water pushing by the openings but the surface tension keeps it from running by. Touch the bottom of the sieve with your finger and the water should run by.
Moving water by reducing air pressure Secure two small bottles. Fill single about half full of water and close it with a single-hole stopper carrying a length of glass tube tha
Q.How are clouds formed? During day time, on being heated, a large amount of water evaporates from various water bodies and goes into the air. A part of this water vapour also r
Q. List the main steps involved in the preparation of oil from oilseeds? The main steps involved in the preparation of oil from oilseeds are: preparation of the raw material,
The rain cycle You can reproduce the rain cycle in miniature in your classroom. Place a box of plant seedlings on the table. Place a metal tray about 35 to 40 cm above the box
A) thickness of the respiratory membrane B) gas concentration gradients C) decrease in pulmonary ventilation D) lung surface area E) no exceptions
Explain the Special Examination of Urine The special examination requires the determination of various chemical substances in the urine including amino acids, bile pigments and
What is ethics
Softening hard water by boiling Temporary hardness can be removed from water by boiling. Shake a little temporary hard water with a few drops of soap solution and see if you c
what is tratosphere
What is full form of WHO ?
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