Satellites orbit the earth because of the force of gravity. To understand why this happens and why the satellite does not get pulled in and fall, we have to understand what forces do. A force will change the motion of an object; it might speed it up, slow it down or change its direction.
How does a tree die? When it is cut down with an axe. But, sometimes, we may end up hurting or killing a tree without meaning to. It may happen when we carve our names or draw a heart on a tree trunk by cutting away the bark of the tree with a knife.
February 5: Young Vittal Partani is one of many volunteers who has been engaged in a singleminded task these last few days in the town of Bhachau that was devastated by the January 26 earthquake, in Gujarat.
Teachers’ Day [Illustration by Shiju George] September 5: An average teacher teaches, a good teacher explains, a superior teacher illustrates, and a great teacher? A great teacher both learns and inspires students to ask questions fearlessly, for asking the right question is like taking the right turn amidst a maze of lanes and bylanes.
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