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Yogita Ingle 5 years, 2 months ago
Smallpox was the first disease for which a vaccine was produced. The smallpox vaccine was invented in 1796 by English physician Edward Jenner.
Laxmi Maurya 5 years, 2 months ago
Posted by Ravi Muru 5 years, 2 months ago
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Yogita Ingle 5 years, 2 months ago
opology refers to the layout pattern in which various computers are connected to one another to form a network. The computers on a network are also referred to as nodes.
There are four main types of topologies. They are:
- Bus Topology: In bus topology, all the computers are connected to a single cable called the bus . The transmission of data from any computer travels through the length of the bus in both the directions and can be received by all other computers on the network.
- Ring Topology: In ring topology, each computer is connected to two other computers so as to form a closed ring-like structure. In this topology, data is transmitted in one direction only. The disadvantage of the ring network is that the breakdown of any one computer on a ring can disable the entire system or network.
- Star Topology: In star topology, all the computers are connected to a central computer or a central node . The data to be exchanged between any two computers passes through the central node. The central node controls all the activities of the nodes.
- Mesh Topology: In mesh topology, every computer is connected to every other computer on the network. Full mesh topology is very expensive to implement. Normally, partial mesh topology is implemented in which a computer is connected to a few other computers in the network .
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👌Aditya 👌 👌Kumar👌 5 years, 2 months ago
Gaurav Seth 5 years, 2 months ago
Chemical Method: Some chemicals prevent the growth of microorganisms in food. These chemicals are used in pickles and jams to preserve them. Salt, acids and oil are also used as food preservatives. Examples: sodium benzoate and sodium metabisulphate.
Preservation by common salt: When a food item is kept in plenty of salt, water from food comes out because of osmosis. It results in dehydration of the food item. Absence of moisture helps to prevent the growth of microbes. Fish, meat and pickles are preserved by adding salt.
Preservation by Sugar: Sugar preserves food by reducing moisture in food. Jam, jelly and squash are preserved by adding sugar.
Preservation by Oil and Vinegar: The layer of oil on top of food prevents oxygen from entering the food. Some microbes do not survive in absence of oxygen. Some microbes cannot survive in acidic environment and thus vinegar is an effective food preservative.
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Pritam Singh 5 years, 2 months ago
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Yogita Ingle 5 years, 2 months ago
P+7/p-6 =1/3
3(p+7) = 1(p-6)
3p + 21 = p - 6
3p - p = -6 -21
2p = - 27
p = -27/2
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Gaurav Seth 5 years, 2 months ago
Rayon can be used as substitute of silk
The man-made fibre which is regarded as artificial silk is rayon.Rayon is synthesized from wood pulp. Rayon resembles silk, so it is also known as artificial silk. Rayon can be dyed in different colours and is much cheaper than silk.
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Sneha Sundriyal 5 years, 2 months ago
Gaurav Seth 5 years, 2 months ago
उत्तर:- बचपन में लेखक अपने मामा के गाँव चाव से इसलिए जाता था क्योंकि लेखक के मामा के गाँव में लाख की चूड़ियाँ बनाने वाला कारीगर बदलू रहता था। लेखक को बदलू काका से अत्यधिक लगाव था। वह लेखक को ढेर सारी लाख की रंग-बिरंगी गोलियाँ देता था इसलिए लेखक अपने मामा के गाँव चाव से जाता था।
गाँव के सभी लोग बदलू को ‘बदलू काका’ कहकर बुलाते थे इस कारण लेखक भी ‘बदलू मामा’ न कहकर ‘बदलू काका’ कहता था।
Posted by Yachika Sharma 5 years, 2 months ago
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Aditya Kumar Lenke 5 years, 2 months ago
2Thank You