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How water acts towards fat Half-fill a tall glass jar with warm water. Add some olive oil or other oil to a depth of about 1 cm. Shake this mixture hard. View how the fat is br
Hazards of a Nuclear World : The-picture painted abdve seems rosy. Yet, it does have a few shades of grey. There are many risks associated with the use of nuclear fission ene
Objectives After studying this unit, you should be able to: 1. Categorise different radiations into ionising and no ionising types, 2. Explain the effects of radiations
Studying broken rocks with a magnifying glass Study freshly broken rocks with a magnifying glass and try to find crystals of dissimilar minerals. The crystals of dissimilar mi
Essential nutrients: Our body is a biochemical factory which can make many compounds for its needs. However, there are limits to this, and what our body cannot make has to be
Explain Relationship of Vitamins and Mineral with physiology They play a major role in the body's functioning. Vitamin A is necessary for night vision in the eyes. Vitamin B co
State of Communication in the Past: Those of us who have experience of life in remote villages, far away from urban centres, are familiar with such features as poor roads whi
What causes winds? An uneven heating of the Earth's surface causes winds. On being heated, air becomes lighter and rises up. As a result, a region of low pressure is created. Th
Acid Rain: A side effect of air pollution is acid rain, which is now of common occurrence. You might have seen, that some industries build very tall smoke stacks to protect t
Imagine a small observer is positioned in front of cork in your picture above. As the cork approaches, the observer measures the wavelength of the waves passing by. How does this w
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