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The difference between hard and soft water
Collect some hard water from a stream(or make some as defined in the next experiment). Also secure some soft water like as rain water or distilled water. Make some soap solution by dissolving soap shavings or powdered soap in a little warm water. Place equivalent amounts of hard and soft water in every of two bottles. Add soap solution to the soft water with a dropper, some drops at a time. Shake the bottle well after every addition. Count the number of drops of soap solution required to produce suds about 1 cm thick on the top.
The effect of petrol on surface tension Being sure that the plate is has to be clean. It is wise to rinse the plate in cold water for a time before filling it. Instead of soap,
INTRODUCTION : In any science lab you work with chemicals, gases, electrical equipments, glassware, instruments etc. In case you are working in a biology laboratory handling the p
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Exploration of resources Exploration of resources involves complex techniques which depend on the physical, chemical and biological properties of a particular resource. Now
Define the Peripheral Nervous System The peripheral nervous system or PNS, is a part of the nervous system and consists of the nerves and neurons that reside or extend outside
How to mount fossils If you occur to live in a locality where fossils are plentiful, it will be interesting to have the peoples make a fossil collection for the school museum.
PROCEDURE : Your Counsellor will be performing the following experiments. You are advised to observe the disposal methods carefully. Experiment 1: Test for studying miscibility
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