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Meghna Thapar 4 years, 5 months ago
The main difference between stars and planets is that stars have high temperatures compared to planets. Stars undergo nuclear reactions—they burn hydrogen in their cores, releasing massive amounts of energy. ... They must have a mass of at least 75 times that of Jupiter, the largest planet in the Solar System. Stars are very big and hot celestial bodies made up of gases. They have their own heat and light, which they emit in large amounts. Planets: Planets are celestial bodies, usually smaller than stars. They do not have their own heat and light.
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Meghna Thapar 4 years, 5 months ago
Earth has seasons because our planet's axis of rotation is tilted at an angle of 23.5 degrees relative to our orbital plane – the plane of Earth's orbit around the sun. The tilt in the axis of the Earth is called its obliquity by scientists. We have seasons because Earth's axis – the imaginary line that goes through the Earth and around which the Earth spins — is tilted. It's tilted about 23.5 degrees relative to our plane of orbit (the ecliptic) around the Sun. As we orbit our Sun, our axis always points to the same fixed location in space.
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Fabric means a woven material, a textile or other material resembling woven cloth. Fabric is made up of yarns. Fabrics are made by the two main processes known as weaving and knitting.
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Meghna Thapar 4 years, 5 months ago
Current only flows when a circuit is complete—when there are no gaps in it. In a complete circuit, the electrons flow from the negative terminal (connection) on the power source, through the connecting wires and components, such as bulbs, and back to the positive terminal. Negative electric current is the movement of negatively charged particles. Now, the current will flow from negative to positive. So at the negative terminal, there are a whole bunch of electrons (negative charge carriers) that will be flowing from negative to positive.
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Meghna Thapar 4 years, 5 months ago
If the investment is more than one crore on any industry, it is considered as a large scale industry. For example, Iron and Steel Industry/Cement Industry. While the investment is less than one crore on an industry, it is considered as a small scale industry e.g. Plastic industry, toy industry.
On the basis of Source of Raw Material
Industries can be agro-based, mineral-based, marine-based and forest-based, depending on the type of raw materials they use.
a) Agro-based Industries.
They use plants and animal-based product as raw materials. food processing, cotton textile, vegetable oil, diary products, sugar, tea, coffee, leather Industries are the examples of agro-based industries.
b) Mineral- based Industries.
They are primary industries that use mineral ores as their raw materials. The product of these industries are used as raw materials by other industries. e.g . iron and steel, cement, petrochemical etc.
c) Marine-based Industries.
They use products from the sea and oceans as raw materials. Industries processing seafood or manufacturing fish-oil are some examples.
d) Forest-based Industries.
They utilise forest produce as raw materials. The industries associated with forest are pulp and paper, pharmaceuticals, furniture and buildings.
<> On the basis of Size.
It refers to the amount of capital invested, number of people employed and the volume of production. Based on size, industries can be small-scale industries and large-scale industries. These industries can be distinguished on the basis of capital and technology used.
a) Large-scale Industries.
If investment is more than one crore rupees in India, then it is called a Large-scale Industry, e.g. iron and steel, Automobile industries etc.
b) Small-scale Industries.
If the capital investment is less than one crore rupees in India, it is termed as small-scale industry, e.g. silk weaving and good processing industries.
<> On the basis of Ownership.
a) Public sector Industries.
They are owned and operated by government agencies. e.g. BHEL (Bharat heavy electronically Ltd), SAIL (Steel authority of India limited) etc.
b) Private sector Industries.
They are owned and operated by individuals, or group of individuals, e.g. Reliance textiles, Tata motors, Dabur industries.
c) Joint sector Industries.
They are jointly run by the state and individuals or a group of individuals, e.g. oil India Ltd is jointly owned by both private & public sectors.
d) Co-operative Sector Industries.
They are owned and operated by the producers or suppliers of raw materials, workers or both. They pool in the resources and share the profits or losses, e.g. AMUL(Anand Milk Union Ltd)
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Meghna Thapar 4 years, 5 months ago
One of the earliest and well-known devices was an abacus. Then in 1822, the father of computers, Charles Babbage began developing what would be the first mechanical computer. And then it 1833 he actually designed an Analytical Engine which was a general purpose computer. The period of first generation was from 1946-1959. The computers of first generation used vacuum tubes as the basic components for memory and circuitry for CPU (Central Processing Unit). Colossus was the world's first electronic digital programmable computer. It used a large number of valves (vacuum tubes).
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