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How to make a simple vacuum pump
Secure a bicycle or automobile hand pump. Open the pump and delete the piston. Un- screws the bolt that holds the leather washers. Reverse the washers by turning them over. Change the washers on the piston and insert in the pump cylinder. A pump of this sort will serve to do a lot of simple vacuum experiments
Illustrate about the Soil Water Water, as you are well aware, is the most common substance on earth which is essential for life. Plants require water continually to satisfy t
Explain the Lubrication of food Dry food enters the mouth. It is moistened and lubricated by the saliva, before it can be made into a bolus ready for swallowing.
What is Dry manure Dry manure though contains 80 percent carbon, yet it is considered primarily as a nitrogen fertilizer and, to a lesser extent, one of potassium. Losses of nu
An experiment with a loop of thread Rinse a dinner plate methodically and then fill it with water. Make a loop with thread, open it a little and float it on the water. Touch th
Non-Specific Defence Mechanism The non-specific defence mechanism is implemented for different types of infections. It resists infection in two ways, firstly, by blocking the e
Give Some examples of minerals used in everyday life? There are many minerals that are used in everyday life. We will discuss a few common examples of minerals and how they ar
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The Copernican Revolution: It was right in the midst of these developments in the fifteenth century, that there came the first major break from the whole system of ancient thou
Observing changes of position of the earth with respect to the sun Mark a line on the floor or the wall where the sun shines in your room. Note the exact month, day and hour. A
What are all the planets in our solar system?
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