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How to make a devil diver (Cartesian diver)
Find a tall glass jar with a quite wide mouth. Wrap a few turns of copper wire about the thin part of the rubber bulb from a medicine dropper. Fill the jar brim full of water. Put a little water in the bulb and float it in the jar of water. The bulb should have enough water to bring it nearly to the point of sinking. At this point approximately all the rubber will be under water. Considerable adjustment will be needed. Remove air from the bulb a bubble at a time by pinching the bulb.
Water-mill in Golden era: The water-mills were also invented in the classical period. But they came to be widely used only in the Middle Ages. The wind-mills and water-mills
Explain in brief about the Laterite soils These soils are derived from the subaerial weathering of several types of rocks, both basic and acid under climatic conditions of alte
how is there a chemical change
Eight students conducted a controlled experiment to demonstrate how walking and running affected their heart rates. Use the data below to answer the following questions. Effects of
Explain Ways How Immune System Protect Us 1) It creates a barrier that prevents bacteria and viruses from entering our body. 2) If a bacterium or virus does get into the b
Physical universe: The universe is vast. The Earth we live on appears to be just a speck of dust circling a small star in a remote corner of an obscure galaxy. If we are a s
Useful Instruction : In the table given below, you can find references to the locations of materials related to this exercise. You are advised to go through these materials to und
What is the important role of Vitamin K Vitamin K , as you may already know, is a fat-soluble vitamin that plays an important role in blood clotting. It was first observe
Structure of Atoms Elements are pure substances. Elements are composed of a single kind of atom, as opposed to compounds which contain two or more kinds of atoms (see lesson 5).
characters of chordates
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