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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 ?
Explain Fatigue - Respiratory Adjustments Fatigue means a state of decreased efficiency due to prolonged exertion. It may occur due to sustained muscle contraction. The muscles
Explain the Vasomotor Centre and Cardio-Inhibitory Centre The vasomotor centre (in the medulla ablongata) excites the respiratory centre. The pulmonary ventilation is increased
what comes first? egg or chicken?
Define Proteins - Abnormal Constituents of Urine Proteins: Abnormal amounts of proteins are excreted in certain inflammatory diseases like glomerulonephritis (inflammation of t
Explain the Functions of Unicellular Organism You might wonder what functions a single-celled organism is capable of performing. Surprisingly, a unicellular organism is able to
I need help with a few homework questions...We had a substitute, and I didn''t get the chance to finish reading the chapter.
Some Physical Features of the Oceans: The oceans are so vast that they stagger one's imagination. They cover more than 70 per cent of the earth's surface. The depth of ocean
what is cell
A nearly horizontal,12 ft wide rectangular channel carries 60cfs at a depth of 3.0ft.The width of the channel is smoothly contracted to 6 ft at the downstream section. (a) Deter
1. Beta catenin is a protein that translocates to the nucleus in the presence of Wnt ligand. In the absence of Wnt, beta catenin is targeted for degradation. Using a cell line fro
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