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Posted by Mohammad Shabbir Azam 6 years, 11 months ago
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Meghna Thapar 5 years, 10 months ago
Electric Bell: It consists of a coil of wire wound on an iron piece. The coil acts as an electromagnet. An iron strip with a hammer at one end is kept close to the electromagnet. There is a contact screw near the iron strip. When the iron strip is in contact with the screw, the current flows through the coil which becomes an electromagnet. It, then, pulls the iron strip. In the process, the hammer at the end of the strip strikes the gong of the bell to produce a sound. However, when the electromagnet pulls the iron strip, it also breaks the circuit. The current through the coil stops flowing. The coil is no longer an electromagnet. It does not attract the iron strip. The iron strip comes back to its original position and touches the contact screw again. This completes the circuit. The current flows in the coil and the hammer strikes the gong again. The clapper strikes the gong rapidly producing almost continuous sound. This is how the bell rings.
Posted by Izmam Husain 6 years, 11 months ago
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Suyash Ratnaparkhi 6 years, 11 months ago
Posted by Md Hamza 6 years, 11 months ago
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Damini Goud 6 years, 10 months ago
Posted by Kapil Kumar 6 years, 11 months ago
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Yogita Ingle 6 years, 11 months ago
Arteries have thick walls because the blood in them rushes at high pressure and because of the high pressure it could break the walls so as to avoid that from happening they have thick walls.
Posted by Shalbi Kumari 6 years, 11 months ago
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Yashvi Soni 6 years, 11 months ago
Posted by Abhijit Sarma 6 years, 11 months ago
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Mohammad Shabbir Azam 6 years, 11 months ago
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Mohammad Shabbir Azam 6 years, 11 months ago
Posted by Sandhya Pathak 6 years, 11 months ago
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Yogita Ingle 6 years, 11 months ago
- Decomposers are micro-organisms that convert the dead plants and animals to humus.
- Bacteria and fungi are the two types of decomposers.
- They help in the process of recycling of nutrients by decomposing various dead organisms such as plants and animals to form humus.
Posted by Chinu Nagpal 6 years, 11 months ago
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Posted by Anirudh Singh Chauhan 6 years, 11 months ago
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Yogita Ingle 6 years, 11 months ago
The angle formed at the point of incidence between the incident ray and the normal is called the angle of incidence And the angle formed between the refracted ray and the normal is called the angle of refraction.
Posted by Sarthak Yadav 6 years, 11 months ago
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Yogita Ingle 6 years, 11 months ago
Aeration is the process by which air is circulated through, mixed with or dissolved in a liquid or substance. Aeration is used in liquids, soils and foods to improve quality and reduce contamination.
Radhika Poddar 6 years, 11 months ago
Posted by Siddhi Bothara 6 years, 11 months ago
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Posted by Satyam Singh 5 years, 9 months ago
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Rajendra Nage 6 years, 11 months ago
Izmam Husain 6 years, 11 months ago
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Ashutosh Jha 6 years, 11 months ago
Posted by Premshuk Premshuk 6 years, 11 months ago
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Posted by Nikky Sagar 6 years, 11 months ago
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Meghna Thapar 5 years, 10 months ago
- Wastewater Treatment Plant:
The process of wastewater treatment includes the following steps:
- Screening: This is the first step in which wastewater is passed through bar screens to remove large objects like rags, wood pieces, sticks, stones, etc.
- Grit and sand removal tanks: Water is then allowed to go into a grit and sand removal tank. This allows the grit, sand, stones and heavy objects to settle at the bottom.
- Sedimentation tanks: Water is now allowed to pass through large tanks called sedimentation tanks. These tanks are large enough so that organic solid matter like faeces sinks slowly to the bottom and materials like grease and oil float at the surface and skimmed off.
- Aeration: The clarified water is passed into an aeration tank which contains aerobic bacteria. This bacteria rapidly grows and consume organic matter like human and animal wastes and convert it into carbon dioxide. The suspended microbes settle down at the bottom as activated sludge.
Posted by Premshuk Premshuk 6 years, 11 months ago
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Posted by Rajendra Nage 6 years, 11 months ago
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Izmam Husain 6 years, 11 months ago
Posted by Rajesh Tripathi 6 years, 11 months ago
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Yogita Ingle 6 years, 11 months ago
Water cycle is the cyclic movement of water from the atmosphere to the earth and back to the atmosphere through various processes. This constant, never ending circulation of water in nature is known as the water cycle.
The process includes:
Evaporation: Water in seas, rivers, lakes, ponds or streams evaporates because of the heat of the sun.
Transpiration: Plants give out a large amount of water through their leaves
Condensation: Water vapor rises up and condenses on dust particles to form cloud.
Precipitation: Water stored in clouds reaches the ground in the form of rain, hail or snow.
Posted by Avantika Tayal 6 years, 11 months ago
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Mohit Lalwani 6 years, 11 months ago
Posted by Yashika Choudhary 6 years, 11 months ago
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Ashutosh Jha 6 years, 11 months ago
Posted by Shruti Mishra 6 years, 11 months ago
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Yogita Ingle 6 years, 11 months ago
- Generators, motors, and transformers
- Electric buzzers and bells
- Headphones and loudspeakers
- Relays and valves
- Data storage devices like VCRs, tape recorders, hard discs, etc.
- Induction cooker
- Magnetic locks
- MRI machines
- Particle accelerators
- Mass spectrometers
Posted by Ritesh Patel 6 years, 11 months ago
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Yogita Ingle 6 years, 11 months ago
Bawris are one of the old methods of rain water management. These are deep wells dug in the ground which have steps to reach the water stored. These bawris help in storage of water for longer time as the amount of evaporation of water from the deep well is very less.Bawris are very popular in Rajasthan. People of Rajasthan get access to water through bawris even in summer season.
Posted by Urmila There 6 years, 11 months ago
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Sufiyan Abdul Salam 6 years, 11 months ago
Mehul, Barnwal 6 years, 11 months ago
Posted by Sunil Rajak 6 years, 11 months ago
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Meghna Thapar 5 years, 10 months ago
Breathing involves the movement of the diaphragm and the rib cage. Breathing involves two steps:
During inhalation, ribs move up and outwards and diaphragm moves down. This movement increases space in our chest cavity and air rushes into the lungs. The lungs get filled with air. The muscles between the ribs contract causing the rib cage to move upward and outward.
During exhalation, ribs move down and inwards, while diaphragm moves up to its former position. This reduces the size of the chest cavity and air is pushed out of the lungs. As the chest cavity becomes smaller air is pushed out from the lungs. Take a deep breath. Keep your palm on the abdomen, feel the movement of abdomen.
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Siddhi Bothara 6 years, 11 months ago
1Thank You