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CHEMISTRY X | Combination Reaction
Combination Reaction Activity Take a small amount of calcium oxide or quick lime in a beaker. Slowly add water to this. Touch the beaker as shown in Fig. 1.3. Do you feel any change in temperature? Figure
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Physics XI | Chapter 2 : Units and Measurements : Measurement of Large Distances
2.3.1 Measurement of Large Distances Large distances such as the distance of a planet or a star from the earth cannot be measured directly with a metre scale. An important method in such cases is the parallax method. When you hold a pencil in front of you against some specific point on the background (a…