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How to prepare hydrogen
Hydrogen can be prepared from a dilute acid, like as hydrochloric or sulphuric, when it is chemically reacted with a metal like as zinc. The acid may be secured from a drug store.
Explain Saliva - External Defence Mechanism Saliva contains microorganisms which are not the normal inhabitants. Dead microbes are passively flushed by the saliva and are swall
a. Which type of ripple marks would you expect to see on the bed of a river? Why? b. Which type would you expect to find on the floor of a standing body of water? Why? c.
Explain Myocardium Myocardium :- The middle layer of the heart wall.
heavy matter in the world
Lasers : Laser light is an extremely intense form of electromagentic radiation and its name is acronym for light amplification by stimulated emission of radiation. Lasers are us
Q. What is the major source of fresh water in the city/town/village where you live? Answer : River is a major source of fresh water.
what is the name of the theory that explains plate movement?
What divides the outer core from the mantle above it? There is a gradual transition caused by a vary in temperature and decreasing pressure..
Oxidation Weathering by oxidation is common in rocks which are rich in the elements that can be easily oxidised e.g. iron. Iron as Fe 2+ present in a mineral is oxidised to Fe
what is ment by general organization in phylum annelida
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