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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 ?
Blowing soap bubbles Soap films and bubbles serve very well for observations on surface tension. You can make a good soap bubble solution by placing three level tablespoonfuls o
Plaster of Paris Secure some plaster of Paris and mix a small amount with water. It must be worked quickly or it will harden whereas being mixed. Place the mixture in moulds an
A hair hygrometer This device will enable you to read the relative humidity directly without the use of tables. Procure a few human hairs about 30 cm long. Free them from gr
Question 1. Explain the routes of administration of drugs 2. List 4 antimuscarinic drugs and mention their uses 3. Explain the role of bronchodilators in the treatment of
Cycling of materials in ecosystem: Living organisms require four nutrients in relatively large amounts, these are carbon. oxygen, nitrogen and hydrogen. They also require phosp
Mechanical parameters Soil is a heterogeneous mixture of organic matter, salts, metal oxides, water and air with silicates as dominant constituents of varying size and composit
Explain Monocytes - Types of White Blood Cells They are motile and occasionally show phagocytic activity. They form only 5% of leukocytes, capable of providing more phagocytic
REQUIREMENTS Chemicals The following materials are common for the whole batch of students at the Study Centre, since this is a demonstration exercise. Acetone (or ethyl meth
if we drink liquid nitrogen then what happen
what is the process of komodo dragon when reproducing by parthenogenesis
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