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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.
VERIFICATION OF STOCK ITEMS : Now you know that a stock register is the key for the verification of all the items purchased from time to time. Let us now perform the second activi
Applications of Optical Fibres: Fibre optics finds many applications in areas like medicine and communications which we will briefly describe. We will also discuss its advht
Define Oxytocin Hormone - Posterior Pituitary Oxytocin is a polypeptide containing 9 amino acids. An 'oxytoxic' agent is a substance that causes the gravid uterus (uterus of a
Define Factors for hypothalamic control of anterior pituitary gland Thyrotropin Releasing Factor (TRF) which causes release of TSH. Corticotropin Releasing Factor (CRF
In what ways does over-grazing lead to soil erosion?
compare water stills and deionizer
As glaciers erode the surface over which they move, sets of parallel linear grooves are sometime worn into the rock surface. These grooves are known as: Striations
State the categories of bulky organic manures These are evaluated mainly on the basis of their nitrogen content and the amount of organic matter present in them. The two import
Observing sun spots Use the telescope that you made in a last experiment. Set it up so that it points directly at the sun and focus it so that a clear and bright image of the s
Media and Distance Education: The role of media in distance education needs a specific mention. It is impIied that teaching is done from a dbtance. It is also understood that
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