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Ask QuestionPosted by Sushil Dubey 7 years ago
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Dipti Sudha 7 years ago
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Meghna Thapar 5 years, 8 months ago
Wheels were invented circa 3,500 B.C., and rapidly spread across the Eastern Hemisphere. Wheels are the archetype of a primitive, caveman-level technology. But in fact, they're so ingenious that it took until 3500 B.C. for someone to invent them.Mar 2, 2012. The wheel is often described as the most important invention of all time – it had a fundamental impact on transport and later on agriculture and industry. ... Soon, it became common for the wheels to turn around a fixed axle. Wheels with spokes, first made around 2000 BC, were lighter, enabling vehicles to move faster. The revolutionary invention of the wheel gave rise to technologies from transportation to modern day machinery as well as some fun concepts. The Wheel is one of the most fundamental inventions we use in our everyday lives.
Posted by Pankaj Nayak 5 years, 2 months ago
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Posted by Aanchal Dubey 7 years ago
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Meghna Thapar 5 years, 8 months ago
The evolutionary history of life on Earth traces the processes by which living and fossil organisms evolved, from the earliest emergence of life to the present. ... The similarities among all known present-day species indicate that they have diverged through the process of evolution from a common ancestor. Most experts agree that all life today evolved by common descent from a single primitive lifeform. It is not known how this early life form evolved, but scientists think it was a natural process which happened about 3,900 million years ago.
Posted by Mumthaz Beegum 7 years, 1 month ago
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Abhijeet Chauhan 7 years ago
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Shekhar Singh Singh 7 years, 1 month ago
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Posted by Ansh Jaiswal 7 years, 1 month ago
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Meghna Thapar 5 years, 8 months ago
Groundwater supplies drinking water for 51% of the total U.S. population and 99% of the rural population. ... 64% of groundwater is used for irrigation to grow crops. Groundwater is an important component in many industrial processes. Groundwater is a source of recharge for lakes, rivers, and wetlands. Groundwater, which is in aquifers below the surface of the Earth, is one of the Nation's most important natural resources. Groundwater is the source of about 33 percent of the water that county and city water departments supply to households and businesses (public supply). Groundwater is a prime natural resource in the Earth. It not only supports all types of life forms to exist in the Earth but also helps in the growth of human civilization. It quenches thirst and fulfils all the house-hold demands. Groundwater is used for the irrigation purposes.
Posted by Ansh Jaiswal 7 years, 1 month ago
- 1 answers
Meghna Thapar 5 years, 8 months ago
There are many reasons why rain helps lawns look greener, but one of the main reasons is nitrogen. After it rains, there is more water available in the soil for plants. ... When this occurs, a part of the nitrogen is released back into the soil. Ultimately, nitrogen causes growth and helps make things green. After it rains, there's typically more water available in the soil for plants, Knoepp said. ... The grass benefits from the freshly fallen rain because the flush of water allows the roots to take up this "new" nitrogen as well as the nitrogen that the microbes have previously released.
Posted by Ansh Jaiswal 7 years, 1 month ago
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Posted by Ansh Jaiswal 7 years, 1 month ago
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Posted by Reena Rai 7 years, 1 month ago
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Posted by Anushka Jain 7 years, 1 month ago
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Posted by Anushka Jain 7 years, 1 month ago
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Meghna Thapar 5 years, 8 months ago
A trowel is a small hand tool used for digging, applying, smoothing, or moving small amounts of viscous or particulate material. A tiling trowel or notched trowel are specifically designed for scooping, spreading, levelling, combing and finishing adhesives and mortars during floor, wall or ceiling installations. A thin metal rectangle with a handle attached to one size, in a range of sizes.
Posted by Anushka Jain 7 years, 1 month ago
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Posted by Anushka Jain 7 years, 1 month ago
- 1 answers
Ronit Kumar 7 years, 1 month ago
Posted by Anushka Jain 7 years, 1 month ago
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Yogita Ingle 7 years, 1 month ago
Natural fibre
<div>- Cotton.
- Silk.
- Fur.
- Jute.
- Flax.
- Wool.
Posted by Anushka Jain 7 years, 1 month ago
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Posted by Bhavna Sharma 7 years, 1 month ago
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Posted by Rajamoni Perumal 7 years, 1 month ago
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Yogita Ingle 7 years, 1 month ago
Plants are important part of nature. They can live on land and in water. Plants are very useful to us and we get many things from plant such as food, wood, paper etc. Most of our food that we eat comes from plants for example -fruits, vegetables, cereals, pulses etc. We eat roots, leaves, stems, flowers and fruits of plants.
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