| Components of Food |
| What are the main food groups
The main food groups are energy giving,body building and protective food.
What is a balanced diet
A diet which contains all the important nutrients in the right amount is Read >> |
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| Measurement and Motion |
| What is translatory motion
If a body moves as a whole such that every part of the body moves through the same distance in a given time the body is in translatory motion.If the body moves in a straight Read >> |
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| Visit to Kanha National Park |
| By Zahie Hosain
Our visit to Kanha national park was very exciting. We went to Nagpur from Delhi and from Nagpur to Kanha. The hotel in which we stayed was Bagh Villas. We reached in the evening Read >> |
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| Motion III |
| Velocity/Time graph
Uniform Motion- The Velocity /Time graph of an object moving in uniform motion is a straight line which passes through the origin.
Slope = y2-y1/x2-x1 Read >> |
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| Motion II |
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Untitled Document
Differences between speed and velocity
Speed
Velocity
It is defined as the rate of change of distance
It is defined as Read >> |
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| Motion |
| Motion- An object is said to be in motion if it changes its position with respect to a stationary reference point or origin.
Rest- An object is said to be at rest if it does not changes its position w Read >> |
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| The Fundamental Unit of Life II |
| Why is plasma membrane also known as the selectively permeable membrane?
Plasma membrane is called selectively permeable membrane because it allows the movement of only selected molecules across it an Read >> |
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| The Fundamental Unit of Life |
| Cell theory
The cell theory stated that all plants and animals are composed of cell and that cell is the basic unit of life and that all cells arise from pre-existing cells.
Who discovered cell and ho Read >> |
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| Law of Conservation of Momentum |
| The sum of momenta of the two objects before collsion is equal to that momenta after collision.There is no extra unbalanced force actiing on them.
This is known as the law of conservation of momentum. Read >> |
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| Give Reasons |
| 1. A rubber ball rebounds on striking the surface of the floor.
When the ball strikes the floor,the floor hits back with the same amount of force because for every action there is an equal and opposit Read >> |
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