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Yogita Ingle 7 years, 1 month ago
Electromagnets are made out of a coil of wire (wire curled in series). This is more effective in producing a magnetic field than just a wire running straight. This effect can be strengthened by winding a wire tightly around a powerful core, made of magnetic material, such as iron. The picture above shows a coil wound around an iron nail. On its own, the iron nail is not magnetic.
Posted by Manveer Kaur Gill 7 years, 1 month ago
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Yogita Ingle 7 years, 1 month ago
Hurricanes are enormous storms which come with rotating wind speed of 74 miles per hour. The rotating wind swirls across the warm water of the tropics and comes with terrifying force. This force blast ashore which causes destruction and even death. Hurricanes are known to be one of the nature’s most destructive storms as they bring heavy rains, deadly waves and fierce winds. Hurricanes leave its mark by hitting the land, rip up trees, cause floods and destroy homes. Thousands of people get killed with this terrifying storm and cause million dollars of damage. People get homeless, everything gets swept away by these floods. Another violent windstorm is known as Tornadoes. Tornadoes winds are more violent and stronger than hurricane winds. Hurricanes last longer and cover up to 500000 square miles of land.
Posted by Poojika Sri 7 years, 1 month ago
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Yogita Ingle 7 years, 1 month ago
When an object changes its position with elapse of time in respect to a stationary object, such as a building, electric pole, etc., the object is said to be in motion.
Rectilinear Motion: Motion along a straight line is known as Rectilinear Motion or motion along straight line. For example: Motion of a car along a straight line.
Curvilinear Motion: Motion along a curve line is known as Curvilinear Motion. For example: Motion of car or any moving object along a curve line.
Circular Motion: Motion along a circle is known as Circular Motion. For example: Motion of cyclist along a circular park.
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Yogita Ingle 7 years, 1 month ago
Soil is formed when rocks are broken down by the action of wind, water and climate. This process is called weathering. The characteristic features of a soil depend upon the rocks from which it has been formed and the kind of plants that grow in it.
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The kidneys in human beings play a vital role in maintaining biological processes inside the body. The main functions are to filter out nitrogenous wastes from the blood producing urine. They absorb minerals into the blood. they also produce hormones to some extent.
Posted by Divya Sharma 7 years, 1 month ago
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Meghna Thapar 5 years, 10 months ago
Sepals are one of the four basic parts of a flower. They are found below the petals.
The sepals are often small and green. Some flowers do not have petals. Then the sepals may be big and colorful. In some flowers, the petals and sepals look the same. They are both called tepals.
All the sepals together are called calyx.
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Gaurav Seth 7 years, 1 month ago
The chemical formula of plaster of paris is CA2SO4.1/2H2O
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Yogita Ingle 7 years, 1 month ago
- The process of transfer of pollen from the anther to the stigma of a flower is called pollination.
- Pollen grains are transferred to stigma by agents like air or water.
- If the pollens are transferred to the stigma of the same flower it is called self pollination.
- If the pollens are transferred to the different flowers of the same plant or flowers of a different plant of the same kind it is called cross pollination.
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Respiration happens inside the cells. As respiration happens inside the cell, it is also called cellular respiration. A cell organelle; called mitochondria; is the site of cellular respiration.
Posted by Satyajit Jagat 7 years, 1 month ago
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Yogita Ingle 7 years, 1 month ago
When it is brought near a bar magnet , its's magnetic field lines interact with that of bar magnet. Hence, a compass needle shows a deflection when brought near the bar magnet.
Because the north seeking pole that naturally points towards the north direction (due to earth's magnetic field) now is attracted to the north end of the bar magnet or the north end of the current carrying loop.
Posted by Himani ?? 7 years, 1 month ago
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Yogita Ingle 7 years, 1 month ago
Pollination occurs when pollen grains from the anther land on a stigma. After pollen grains land on the stigma, apollen tube grows from the pollen grain, through the style, and into the ovary. Sperm cells inside the pollen grain travel down the pollen tube and into the ovarywhich contains the ovules.
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Astha Kathpal 7 years, 1 month ago
2Thank You