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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 ?
Lab hygiene : The need for continuous attention to hygiene in any type of laboratory cannot be overemphasised. Any spillage of chemicals, battery acid, blood, plasma, serum, etc.
How the lungs work Cut the bottom off a large bottle. Fit a cork to the neck with a Y tube in it. On every of the lower limbs of the Y tie a rubber balloon or a number of small
Determine in detail about the Phosphorus Phosphorus, with nitrogen and potassium is classed as a major nutrient element. It is a constituent of nucleic acids, phytin, phosphol
describe the typical conditions necessary for fossil formation?
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Explain Intermittent positive pressure lung inflation When medulla is affected, the cough reflex may be lost. To prevent secretions entering the lungs, a tube is inserted into
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
if we drink liquid nitrogen then what happen
Explain the Oxygen toxicity - Histotoxic Hypoxia Exposure to oxygen at increased pressure can produce a marked increase in the dissolved oxygen in blood. It produces toxic effe
how do plates make there own food
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