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    • Posted by Noman Shaikh 4 years, 11 months ago

    CBSE > Class 08 > Science
    • 1 answers

    Gaurav Seth 4 years, 11 months ago

    Anthracite is the best quality of coal with least ash content. Anthracite is a hard, compact variety of mineral coal that has a high luster. It has the highest carbon count and contains the fewest impurities of all coals, and has the highest calorific content as compared to other types of coals such as bituminous coal and lignite.

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    • Posted by Noman Shaikh 4 years, 11 months ago

    CBSE > Class 08 > Science
    • 1 answers

    Gaurav Seth 4 years, 11 months ago

    A renewable resource is any natural resource that replaces itself given enough time. The rate of replenishment must be equal to or faster than the rate of usage. As water continuously evaporates from the Earth's surface, it collects in the atmosphere to later come back to the Earth as rain. On the Earth itself surface water replenishes groundwater, and groundwater replaces surface water. With careful management and responsible usage, water is a renewable resource.

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    • Posted by Noman Shaikh 4 years, 11 months ago

    CBSE > Class 08 > Science
    • 1 answers

    Gaurav Seth 4 years, 11 months ago

    Coal and petroleum are non-renewable exhaustible natural resources as once used they are lost forever. They are not replenished by nature and their formation takes a very long period of time. On the other hand, inexhaustible resources are renewable resources that get replenished by nature and hence, they don't get depleted when used. For example, forests, water etc.

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    • Posted by Kesava Priya 4 years, 11 months ago

    CBSE > Class 08 > Science
    • 2 answers

    Kesava Priya 4 years, 11 months ago

    Ok

    0Thank You

    Aniket Kumar 4 years, 11 months ago

    Led is a metal.

    2Thank You

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    • Posted by Mehak Bansal 4 years, 11 months ago

    CBSE > Class 08 > Science
    • 2 answers

    Aniket Kumar 4 years, 11 months ago

    The liquids mentioned( milk, honey, vegetable oil) are bad conductors of electricity but water is a good conducter of electricity.

    0Thank You

    Gaurav Seth 4 years, 11 months ago

    Liquids which are good conductors: Some liquids too can conduct electricity, e.g. tap water, lemon juice, vinegar, salt solution, etc. Most of the liquids which conduct electricity are solutions of acid, base or salt.

    Liquids which are bad conductors: Some liquids are bad conductors of electricity, e.g. distilled water, honey, milk, vegetable oil, etc.

    Tap water conducts electricity because it contains various salts dissolved in it. Hence, it is advised not to touch an electric switch with wet hands.

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    • Posted by J. Firdhouse 4 years, 11 months ago

    CBSE > Class 08 > Science
    • 0 answers
    ANSWER

    • Posted by Everything Here 4 years, 11 months ago

    CBSE > Class 08 > Science
    • 2 answers

    Everything Here 4 years, 11 months ago

    Edward Jenner ??

    0Thank You

    Divyansh Mehta 4 years, 11 months ago

    Edward Jenner

    1Thank You

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    • Posted by Aayushi Jain 4 years, 11 months ago

    CBSE > Class 08 > Science
    • 2 answers

    Aniket Kumar 4 years, 11 months ago

    Friction of air.

    0Thank You

    Yogita Ingle 4 years, 11 months ago

    A shower of meteors or shooting stars is caused due to :- a. friction of air b. friction of only Carbon dioxide c. friction from spaceship d. friction due to streamlined shape

    Ans a. friction of air

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    • Posted by Medikonda Prem 4 years, 11 months ago

    CBSE > Class 08 > Science
    • 1 answers

    Md.. Masood Ansari 4 years, 11 months ago

    The heat of combustion of benzene in a bomb calorimeter is found to be 3263.9kj/mole at 25 degree celsius.

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    • Posted by Medikonda Prem 4 years, 11 months ago

    CBSE > Class 08 > Science
    • 0 answers
    ANSWER

    • Posted by Medikonda Prem 4 years, 11 months ago

    CBSE > Class 08 > Science
    • 0 answers
    ANSWER

    • Posted by Medikonda Prem 4 years, 11 months ago

    CBSE > Class 08 > Science
    • 0 answers
    ANSWER

    • Posted by Medikonda Prem 4 years, 11 months ago

    CBSE > Class 08 > Science
    • 1 answers

    Meghna Thapar 4 years, 10 months ago

    Mechanical stability can be checked by computing the force constants (or the Hessian matrix of the energy second derivatives). If it is positive definite then your molecule is stable, meaning it will not deform as it is at its energy minimum. Chemical stability maybe checked by calculating the HOMO-LUMO gap. An open-shell system would be unstable and can chemically react very easily, while a large gap molecule would be inert (such is the case of rare gas atoms where the gap is large), because it will not easily hybridize with the atom or molecule that is approaching it.

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    • Posted by Medikonda Prem 4 years, 11 months ago

    CBSE > Class 08 > Science
    • 1 answers

    Meghna Thapar 4 years, 10 months ago

    The resonance energy is defined as the difference between the electronic energy of a real (conjugated) molecule and a hypothetical Kekuléé structure with localized bonds. The resonance energy of benzene is 36 kcal mol-1. To measure the resonance energy of benzene we start with the enthalpy of hydrogenation for cyclohexene, which is -28.6 kcal mol-1. The difference between the potential energy of the actual structure and that of the contributing structure with the lowest potential energy is called the resonance energy or delocalization energy. Benzene is an important organic chemical compound with the chemical formula C6H6.

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    • Posted by Chetali Chavan 4 years, 11 months ago

    CBSE > Class 08 > Science
    • 1 answers

    Gaurav Seth 4 years, 11 months ago

    • Birds and animals travel from their own habitat to a different habitat due to several reasons at a certain period of the year.
    • This phenomenon is called migration and the species that migrate are called migrators.
    • They migrate to avoid suffering from thrilling heat or cold that imparts a tremendous impact on the availability of food for certain species.
    • Birds and animals leave such harsh conditions and look for some different habitat where they can stay comfortably and have food to survive.
    • They also migrate to find a suitable habitat to lay eggs and raise their young due to improper and inhospitable conditions in their natural habitat.

    2Thank You

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    • Posted by Chetali Chavan 4 years, 11 months ago

    CBSE > Class 08 > Science
    • 1 answers

    Gaurav Seth 4 years, 11 months ago

    • Birds and animals travel from their own habitat to a different habitat due to several reasons at a certain period of the year.
    • This phenomenon is called migration and the species that migrate are called migrators.
    • They migrate to avoid suffering from thrilling heat or cold that imparts a tremendous impact on the availability of food for certain species.
    • Birds and animals leave such harsh conditions and look for some different habitat where they can stay comfortably and have food to survive.
    • They also migrate to find a suitable habitat to lay eggs and raise their young due to improper and inhospitable conditions in their natural habitat.

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    • Posted by Deepak Kumar Dk 4 years, 11 months ago

    CBSE > Class 08 > Science
    • 5 answers

    Aniket Kumar 4 years, 11 months ago

    Microorganisms can't be seen through naked eyes. They can be seen through microscope

    0Thank You

    Kalp Shah 4 years, 11 months ago

    Microorganisms cannot be seen with our naked eyes we have to use microscope and magnifying glass to save them

    0Thank You

    Chetali Chavan 4 years, 11 months ago

    Microorganisms cant seen with our naked eye. So we have to see under microscopes or magnifying ???glass

    0Thank You

    Diksha Pandey 4 years, 11 months ago

    Yes microorganisms can't see naked eyes . They can be seen by microscope.

    0Thank You

    Niharika Bisht 4 years, 11 months ago

    No, microorganism cannot seen with naked eyes. They have been seen by microscope.

    2Thank You

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    • Posted by Saurav Mishra 4 years, 11 months ago

    CBSE > Class 08 > Science
    • 3 answers

    Ishaan Srivastava 4 years, 11 months ago

    Earth is Geoid in Shape

    1Thank You

    Mayank Upreti 4 years, 11 months ago

    Birds and animals travel from their own habitat to a different habitat due to several reasons at a certain period of the year. This phenomenon is called migration and the species that migrate are called migrators. They migrate to avoid suffering from thrilling heat or cold that imparts a tremendous impact on the availability of food for certain species. Birds and animals leave such harsh conditions and look for some different habitat where they can stay comfortably and have food to survive. They also migrate to find a suitable habitat to lay eggs and raise their young due to improper and inhospitable conditions in their natural habitat. Bhos

    1Thank You

    Janhvi Parate 4 years, 11 months ago

    Earth is massive enough to pull of gravity maintain its rounded spherical shape ....???

    1Thank You

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    • Posted by Ishu Choudhary 4 years, 11 months ago

    CBSE > Class 08 > Science
    • 2 answers

    Everything Here 4 years, 11 months ago

    Sprinkler system and drip irrigation

    0Thank You

    Chetali Chavan 4 years, 11 months ago

    The modern methods of irrigation is sprinkler system and drip irrigation

    0Thank You

    ANSWER

    • Posted by Ayush Kumar 4 years, 11 months ago

    CBSE > Class 08 > Science
    • 2 answers

    Aniket Kumar 4 years, 11 months ago

    Ribosome bacteria converts nitrogen in air into nitrogen which can be used by plants.

    0Thank You

    Janhvi Parate 4 years, 11 months ago

    What is this ribosome ...

    0Thank You

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    • Posted by Ayush Kumar 4 years, 11 months ago

    CBSE > Class 08 > Science
    • 2 answers

    Aniket Kumar 4 years, 11 months ago

    Candel, Vaseline, etc.

    0Thank You

    Ishu Choudhary 4 years, 11 months ago

    Candle, vaseline, ointments etc

    0Thank You

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    • Posted by Ayush Kumar 4 years, 11 months ago

    CBSE > Class 08 > Science
    • 3 answers

    Aniket Kumar 4 years, 11 months ago

    Carbon. They are allotropes of carbon.

    0Thank You

    Ishaan Srivastava 4 years, 11 months ago

    Coql

    0Thank You

    Ishu Choudhary 4 years, 11 months ago

    Carbon

    0Thank You

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    • Posted by Nikhil Kumar 4 years, 11 months ago

    CBSE > Class 08 > Science
    • 3 answers

    Aniket Kumar 4 years, 11 months ago

    Kerosene.

    0Thank You

    Ayush Kumar 4 years, 11 months ago

    Petroleum gas, petrol, kerosene

    0Thank You

    Nikhil Kumar 4 years, 11 months ago

    Answer is fuel

    1Thank You

    ANSWER

    • Posted by Nidhi /Saurya Yadav 4 years, 11 months ago

    CBSE > Class 08 > Science
    • 3 answers

    Aniket Kumar 4 years, 11 months ago

    Lusture.

    0Thank You

    Ayush Kumar 4 years, 11 months ago

    Lustrous

    0Thank You

    Gaurav Seth 4 years, 11 months ago

    Lusture property
     Lustre: Metals in the pure state generally shine. The shine on the metallic surface is called the metallic lustre.

    Deep Explanation:

    Metals are lustrous because of the free electrons present in them. The free electrons can move freely in the metal causing any light incident on them to get reflected back. This reflection is specular reflection rather than diffused and thus the metal surface appears shiny or lustrous.

     

    1Thank You

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    • Posted by Manasve Sundar 4 years, 11 months ago

    CBSE > Class 08 > Science
    • 3 answers

    Ishaan Srivastava 4 years, 11 months ago

    Dark

    0Thank You

    Maths Tech 4 years, 11 months ago

    Preparation of soil, weeding, protection of crops, sowing of seeds, irrigation, improving soil fertility, harvesting:cutting, winnowing, threshing

    0Thank You

    Aditya Verma 4 years, 11 months ago

    The vibrating drum skin causes nearby air particles to vibrate, which in turn causes other nearby air particles to vibrate. These vibrating particles make up a sound wave. When electricity is passed through a speaker, the diaphragm vibrates and produces sound waves, just like a drum.

    1Thank You

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    • Posted by Chetali Chavan 4 years, 11 months ago

    CBSE > Class 08 > Science
    • 2 answers

    Manasve Sundar 4 years, 11 months ago

    SOIL PREPERATION: Before raising a crop, the soil in which it is to be grown is prepared by ploughing, levelling, and manuring. Ploughing is the process of loosening and digging of soil using a plough. This helps in proper aeration of the soil. After ploughing, the soil is distributed evenly and levelled in the process called levelling. The soil is then manured. SOWING: Selection of seeds of good quality crop strains is the primary stage of sowing. After the preparation of soil, these seeds are dispersed in the field and this is called sowing. Sowing can be done manually, by hand or by using seed drilling machines. Some crops like paddy are first grown into seedlings in a small area and then transplanted to the main field. MANURING: Crops need nutrients to grow and produce yield. Thus, the supply of nutrients at regular intervals is necessary. Manuring is the step where nutritional supplements are provided and these supplements may be natural (manure) or chemical compounds (fertilizers). Manure is the decomposition product of plant and animal wastes. Fertilizers are chemical compounds consisting of plant nutrients and are produced commercially. Apart from providing nutrients to crop, manure replenishes soil fertility as well. Other methods for soil replenishment are vermicompost, crop rotation, planting of leguminous plants. IRRIGATION: Irrigation is the supply of water. Sources of water can be wells, ponds, lakes, canals, dams etc. Over irrigation may lead to waterlogging and damage the crop. This frequency and interval between successive irrigation need to be controlled. WEEDING: Weeds are unwanted plants which grow among crops. They are removed by using weedicides, by manually pulling them with hands and some are removed during soil preparation. HARVESTING: Once the crop is matured, it is cut and gathered, this process is called harvesting. Followed by harvesting, grains are separated from the chaff either by threshing, or manually in small scale (winnowing). STORAGE: Grains yielded are stored in granaries or bins at godowns for later use or marketing. Therefore, methods of crop protection need to be better. In order to protect grains from pest and rodents- cleaning, drying, fumigation, etc., are done prior to storing.

    1Thank You

    Manasve Sundar 4 years, 11 months ago

    Soil preperation Before raising a crop, the soil in which it is to be grown is prepared by ploughing, levelling, and manuring. Ploughing is the process of loosening and digging of soil using a plough. This helps in proper aeration of the soil. After ploughing, the soil is distributed evenly and levelled in the process called levelling. The soil is then manured. Sowing Selection of seeds of good quality crop strains is the primary stage of sowing. After the preparation of soil, these seeds are dispersed in the field and this is called sowing. Sowing can be done manually, by hand or by using seed drilling machines. Some crops like paddy are first grown into seedlings in a small area and then transplanted to the main field. Manuring Crops need nutrients to grow and produce yield. Thus, the supply of nutrients at regular intervals is necessary. Manuring is the step where nutritional supplements are provided and these supplements may be natural (manure) or chemical compounds (fertilizers). Manure is the decomposition product of plant and animal wastes. Fertilizers are chemical compounds consisting of plant nutrients and are produced commercially. Apart from providing nutrients to crop, manure replenishes soil fertility as well. Other methods for soil replenishment are vermicompost, crop rotation, planting of leguminous plants. Irrigation Irrigation is the supply of water. Sources of water can be wells, ponds, lakes, canals, dams etc. Over irrigation may lead to waterlogging and damage the crop. This frequency and interval between successive irrigation need to be controlled. Weeding Weeds are unwanted plants which grow among crops. They are removed by using weedicides, by manually pulling them with hands and some are removed during soil preparation. Harvesting Once the crop is matured, it is cut and gathered, this process is called harvesting. Followed by harvesting, grains are separated from the chaff either by threshing, or manually in small scale (winnowing). Storage Grains yielded are stored in granaries or bins at godowns for later use or marketing. Therefore, methods of crop protection need to be better. In order to protect grains from pest and rodents- cleaning, drying, fumigation, etc., are done prior to storing.

    1Thank You

    ANSWER

    • Posted by Palak Choudary 4 years, 11 months ago

    CBSE > Class 08 > Science
    • 1 answers

    Yogita Ingle 4 years, 11 months ago

    In nature, a rainbow is formed when sunlight is refracted on entering a droplet of water, reflected inside the back of the droplet and finally refracted again on leaving the droplet.

    1Thank You

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    • Posted by Samridhi Hariharno 4 years, 11 months ago

    CBSE > Class 08 > Science
    • 3 answers

    Param Bhatu 4 years, 11 months ago

    Hi

    2Thank You

    Samridhi Hariharno 4 years, 11 months ago

    Thank you

    0Thank You

    Yogita Ingle 4 years, 11 months ago

    Petroleum is a fossil fuel that naturally occurs in the liquid form created by the decomposition of organic matter beneath the surface of the earth millions of years ago. These fossil fuels are then refined into usable substances such as petrol, kerosene etc. It is formed by the combination of hydrocarbons and other substances, mainly sulphur. When first collected in its natural form, it is termed as crude oil. This substance is generally characterized by a brownish-black colour. Although, it can also differ between red to pale yellow or even colourless. Its thickness (viscosity) varies from nearly solid tar-like consistency to low viscosity, almost like water.

    3Thank You

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    • Posted by Bhagyashri Patkari 4 years, 11 months ago

    CBSE > Class 08 > Science
    • 2 answers

    Anjali Kumari 4 years, 11 months ago

    What is bacteria?

    2Thank You

    Yogita Ingle 4 years, 11 months ago

    Antibiotics are medicines that are used to treat as well as prevent bacterial infections. They inhibit the growth and sometimes destroy the microorganisms that cause infections. Its use is encouraged because it is fairly harmless to human beings and animals. It treats diseases caused by bacteria by inhibiting the synthesis of their cell walls and sometimes by interfering in the functioning of their DNA.

    1Thank You

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    • Posted by Simran Kuladipya 4 years, 11 months ago

    CBSE > Class 08 > Science
    • 3 answers

    Bhenketwswa Bag 4 years, 11 months ago

    ???

    1Thank You

    👌Aditya 👌 👌Kumar👌 4 years, 11 months ago

    Cells are the basic building blocks of all living things. The human body is composed of trillions of cells. They provide structure for the body, take in nutrients from food, convert those nutrients into energy, and carry out specialized functions. Cells also contain the body’s hereditary material and can make copies of themselves. Cells have many parts, each with a different function. Some of these parts, called org Not copied from anywhere else ???????

    5Thank You

    Simran Kuladipya 4 years, 11 months ago

    They provide structure for the body,take in nutrient into energies and carry out functions. Cell also contains the body's hereditary materials and can make copies of themselves . Cell have many parts ,each with a different functions.

    3Thank You

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