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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 ?
b) discuss briefly the scientific and technical achievements of the bronze age
why does sedimentary rock form fossils
FIRST AID TREATMENT FOR SHOCK : Some degree of shock is produced in most accidents. Shock is associated with changes in the system of blood circulation varying from temporary
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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
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