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Yogita Ingle 7 years, 5 months ago
Photosynthesis is an example of an endothermic chemical reaction. In this process, plants use the energy from the sun to convert carbon dioxide and water into glucose and oxygen. This reaction requires 15MJ of energy (sunlight) for every kilogram of glucose that is produced:
sunlight + 6CO2(g) + H2O(l) → C6H12O6(aq) + 6O2(g)
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Meghna Thapar 5 years, 6 months ago
Atmospheric refraction is the phenomenon of bending of light on passing through the Earth’s atmosphere. The reason for this occurrence is that the upper layers of the Earth’s atmosphere are rarer compared to the lower layers.
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Meghna Thapar 5 years, 6 months ago
The process by which green plants use sunlight to make food from carbon dioxide and water is called photosynthesis. The synthesis of food in plants occurs in leaves due to the presence of green pigment called chlorophyll. It is responsible for the absorption of light energy from the sun. The solar energy is captured by the leaves and stored in the plant in the form of food.
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Meghna Thapar 5 years, 6 months ago
The process by which green plants use sunlight to make food from carbon dioxide and water is called photosynthesis.
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Yogita Ingle 7 years, 5 months ago
Consumes microscopic plants such as unicellular algae and small zooplanktons. It shows holozoic mode of nutrition. Food particles are captured or diffused with the help of pseudopodia and then ingested. The ingested food particles are digested inside the cell with the help of enzymes.
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Yogita Ingle 7 years, 5 months ago
Electric Bell: Electric Bell is composed of two rods of cast iron. Coil is made around the iron rods. A metallic strip is placed parallel to the coils. The metallic strip is fitted with a hammer at one end. Another end of the strip is connected to the circuit. A gong is placed in a position so that it can be hit by the hammer. When current flows in the circuit, the cast iron rods become electromagnet and attract the metallic strip. The metallic hammer hits the gong because of that. Once the metallic strip is pulled towards the electromagnet, it gets disconnected from the point and there is a break in the circuit. A spring pulls the metallic strip back because no magnetism is left in the electromagnet. This cycle continues and the electric bell produces a ringing sound.
Posted by Siddharth Singh 7 years, 5 months ago
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Meghna Thapar 5 years, 6 months ago
The living together of two different species of plants as if they are parts of the same plant and help each other in obtaining food is called symbiosis and such plants are known as symbiotic plants like lichens.
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Yogita Ingle 7 years, 5 months ago
The motion of pendulum starting from one extreme end to another extreme end and back to the first extreme end is called one oscillation. Similarly, the motion of a simple pendulum from its mean position to extreme left and extreme right and back to the mean position is called one oscillation.
Time taken to complete one oscillation by the pendulum is called time period.
Time Period = time/number of oscillations
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