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Floating a needle on water
Thoroughly dry a steel needle. Place it on the tines of a dinner fork and gently smash the surface of the water in a dish with the fork. If you are careful the needle will float as you take the fork away. Look at the water surface closely. Can you see how the surface film seems to curve under the weight of the needle ?
advanced in live zoology
What is ethics
Q. Do you know of any activity which may be polluting this water source? Answer: The discharge of waste water from homes, industries, hospitals, etc. into the river pollutes thi
Accident Reporting Procedure : It is better to use incident book and accident report forms for the purposes of keeping records of accidents. The incident book is to be maintained
Explain causes of Fever - Immune System We have seen that due to injury, cut or bite, the inflammatory response develop and this is localized or systemic. The localized respons
Explain the Olfactory receptors In the section on taste receptors earlier, we learnt that there is a regional distribution of taste buds for primary taste sensations like sweet
Define Benefits and Constraints of Multicellular Organisms Some of the benefits and constraints of multicellular organisms are as follows: 1) There is a unique co-ordination
What is the Iimportant consequence of soil aeration Another important consequence of soil aeration is oxidation-reduction reactions that take place in soil and this may decide
Explain the Hyposecretion during Adult Life Hyposecretion during adult life: It is only currently becoming recognized, the usual feature being low blood glucose level (hypoglyc
How to make a simple apparatus for distilling water You can make a easy water-distilling apparatus from a flask, and a length of glass or rubber tubing. Fit the flask with a si
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