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A lift pump
To change the syringe and make a simple lift pump, burn two holes by the piston with a hot wire and fit a thin piece of leather or rubber above them to act as a valve which closes on the upstroke and yet permits liquid to pass by on the down stroke
A simple balance Suspend a ruler by loops of cord a short distance above a table top, as shown in the diagram. When the ruler is in balance, place identical coins in dissimilar
what are the problems
Explain the Chemical Control of Respiration Let us now focus on the chemical control of respiration. But before that, let's get to know which chemicals are involved in this pro
Explain the Menstrual Phase - Menstrual Cycle If the ovum is not fertilized, a high level of progesterone in the blood inhibits the activity of pituitary gland and the producti
How do you explain the fact that clay soils which commonly have higher pore space than sandy soils are often more poorly aerated than sandy soils. Clay soils have higher pore s
Spontaneous Generation: If we look around at our everyday environment, we observe that straw, soil, mud, dirt, indeed any sort of refuse or rotting matter is infested with a
what is meaning of solid'' liguid'' gases?why eresers float in water?why deos paper sink in water?
Define Macrophages - CSF It is produced by macrophages, fibroblasts and endothelial cells. They specifically stimulate precursors of macrophages. It also enhances effector res
Describe about the term - inorganic phosphorus The large quantity of carbon dioxide evolved during organic matter decomposition is thought to be important to the release of ce
Personal sensitivity : There are other dangers from substances which are not so common. e.g. mutagens , but one aspect we have not mentioned involves you. The eyes, lungs and skin
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