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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.
The effect of falling water on topsoil Fill a flower pot with sandy soil or loam. Set the pot under a dripping tap for an hour or more. View how the clay and inorganic matter a
descibe the factors which decidethe broad area of scientific activity?
Explain the Hormones in the urine Increased or decreased production of a hormone in the body alters the amount of hormone or its degraded products excreted in the urine. For ex
Some Features of the Forests: Forests are the most widespread stretches of vegetation, harbouring diverse kinds of life forms. They are dominated by trees. Besides trees, f
Locate Polaris, the North star, and comment on it's elevation over the Northern horizon. Using the keyboard controls (J, K and L keys), fast forward the program 6 - 12 hours and c
Chain Reaction: When the atomic nucleus splits, it not only gives off energy, but also throws out two or three more neutrons. 'These new neutrons can, in turn, split two or
which is longset cell in human body
Shut -down Sequences : In some respects, the time when the lab is being shut down is potentially one of the most dangerous periods of the day. For example, at the end of a day's w
To study the formation of a drop of liquid Gently pour aniline into a large beaker of cold water unless a layer about half an inch deep accumulates at the bottom. Place the bea
Define the functions of the Macrophages The macrophages: 1) phagocytose microorganisms and inert particles 2) secrete IL-1 (Interlukin I), TNF (tumor necrosis factor),
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