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    • Posted by Hirak Bikash 7 years, 10 months ago

    CBSE > Class 08 > Science
    • 1 answers

    Yogita Ingle 7 years, 10 months ago

    Calorific value: The calorific value is the measurement of heat or energy produced, and is measured either as gross calorific value or net calorific value.
    Fuel efficiency : Fuel efficiency is the efficiency of a process that converts chemical potential energy contained in a carrier fuel into kinetic energy or work.

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    • Posted by Mouly Bagde 7 years, 10 months ago

    CBSE > Class 08 > Science
    • 1 answers

    Yogita Ingle 7 years, 10 months ago

    When fuels are burnt, heat is produced. The amount of heat produced by different types of fuels on burning is expressed in terms of calorific value. Calorific value of a fuel may be defined as the amount of heat produced on complete burning of 1 gm of fuel. S.I. unit of calorific value of fuels is kilojoule per gram (KJ/g).
    The higher the calorific value of a fuel, the higher its combustion rate is, which is important knowledge to know. A low calorific value indicates more water vapor absorption.

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    • Posted by Mouly Bagde 7 years, 10 months ago

    CBSE > Class 08 > Science
    • 1 answers

    Yogita Ingle 7 years, 10 months ago

    When fuels are burnt, heat is produced. The amount of heat produced by different types of fuels on burning is expressed in terms of calorific value. Calorific value of a fuel may be defined as the amount of heat produced on complete burning of 1 gm of fuel. S.I. unit of calorific value of fuels is kilojoule per gram (KJ/g).
    The higher the calorific value of a fuel, the higher its combustion rate is, which is important knowledge to know. A low calorific value indicates more water vapor absorption.

    1Thank You

    ANSWER

    • Posted by Ankita Aswal 7 years, 10 months ago

    CBSE > Class 08 > Science
    • 1 answers

    Kishan Chaudhary 7 years, 10 months ago

    The water suitable for drinking by humans is called potable water

    1Thank You

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    • Posted by Komal Sehrawat 7 years, 10 months ago

    CBSE > Class 08 > Science
    • 2 answers

    Khushbu Chouhan 7 years, 10 months ago

    A push or pull on an object is called force

    0Thank You

    Kishan Chaudhary 7 years, 10 months ago

    A push or a pull is force

    1Thank You

    ANSWER

    • Posted by Abhishek Yadav 7 years, 10 months ago

    CBSE > Class 08 > Science
    • 1 answers

    Abhishek Kumar 7 years, 10 months ago

    The organisms which we normally cannot see through our naked eye is called microorganisms or microbes.

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    • Posted by Ishna Nagfase 7 years, 10 months ago

    CBSE > Class 08 > Science
    • 1 answers

    Yogita Ingle 7 years, 10 months ago

    Coal:
    (i) Coal is a fossil fuel obtained from the earth.
    (ii) These are formed due to decaying of organic maters and animal wastes for millions of years under the ground.
    (iii) There are many types of coal available in earth like Anthracite, Bituminous, lignite, peat,etc.

    Coke:
    (i) Coke is modified form of coal.
    (ii) Coal obtained from the earth posses large amount of impurities like sulphure, volatile matters, ash,etc. when this impurities are removed,coal will large amount of fixed carbon. So, coke is the purest form of coal when large amount of carbon and this is obtained by heating the coal(bituminous) in absence of air.

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    • Posted by Yugal Patel 7 years, 10 months ago

    CBSE > Class 08 > Science
    • 1 answers

    Amrit Choudhary 7 years, 10 months ago

    The process of fertilisation meeting of an cell from the mother and a sperm cell from father

    1Thank You

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    • Posted by Sana John 7 years, 10 months ago

    CBSE > Class 08 > Science
    • 1 answers

    Yogita Ingle 7 years, 10 months ago

    A kaleidoscope is composed of a hollow tube. Three mirrors are placed in the form of a triangular tube and their reflecting surfaces face each other. One end of the tube is covered with a transparent sheet and another end is covered with an opaque sheet. There is an eyehole in the opaque sheet. Bits of glass are filled inside the tube. When a kaleidoscope is turned, we get to see various patterns in it. These patterns are formed because of multiple reflections.

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    • Posted by Shantanu Shukla 7 years, 10 months ago

    CBSE > Class 08 > Science
    • 0 answers
    ANSWER

    • Posted by Shantanu Shukla 7 years, 10 months ago

    CBSE > Class 08 > Science
    • 0 answers
    ANSWER

    • Posted by Amayra Yadav 7 years, 10 months ago

    CBSE > Class 08 > Science
    • 2 answers

    Ayushi Srivastava 7 years, 10 months ago

    I think it is present in curd

    1Thank You

    Aastha Sinha 7 years, 10 months ago

    Lactobacillus

    2Thank You

    ANSWER

    • Posted by Darshanee Patidar 7 years, 10 months ago

    CBSE > Class 08 > Science
    • 2 answers

    Aastha Sinha 7 years, 10 months ago

    Property which allows metals to be drawn in thin wires.

    0Thank You

    Surya Kumar 7 years, 10 months ago

    Object that can be drawn into wire

    3Thank You

    ANSWER

    • Posted by Arnav Raj 7 years, 10 months ago

    CBSE > Class 08 > Science
    • 0 answers
    ANSWER

    • Posted by Sree Hari 7 years, 10 months ago

    CBSE > Class 08 > Science
    • 0 answers
    ANSWER

    • Posted by Kashish Dubey 7 years, 10 months ago

    CBSE > Class 08 > Science
    • 1 answers

    Amrit Choudhary 7 years, 10 months ago

    Fertilisation results in the formation of zyogte which begins to develop into an embryo.the zygote divides repeatedly to give rise to ball of cells.the cells then begin to form groups that devolp into different tissues and organs of the body.this develop structure is termed an embryo.

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    • Posted by Satender Prajapati 7 years, 10 months ago

    CBSE > Class 08 > Science
    • 1 answers

    Pradun Singh 7 years, 10 months ago

    A force exerted on unit surface area

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    • Posted by Ankita Debnath 7 years, 10 months ago

    CBSE > Class 08 > Science
    • 0 answers
    ANSWER

    • Posted by Nithya Shri 7 years, 10 months ago

    CBSE > Class 08 > Science
    • 4 answers

    Rishabh Pandey 7 years, 10 months ago

    Mars.

    1Thank You

    Arnav Raj 7 years, 10 months ago

    Mars

    1Thank You

    Praketh Dutt Chowtapalli 7 years, 10 months ago

    Yaa, it's mars

    1Thank You

    Devesh Lodhe 7 years, 10 months ago

    Mars

    2Thank You

    ANSWER

    • Posted by Pratik Samantaray 7 years, 10 months ago

    CBSE > Class 08 > Science
    • 1 answers

    Satender Prajapati 7 years, 10 months ago

    Light emitting diode

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    ANSWER
    A

    • Posted by Patel Rukaiya Imteyaj 7 years, 10 months ago

    CBSE > Class 08 > Science
    • 1 answers

    Satender Prajapati 7 years, 10 months ago

    B

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    • Posted by Tejas Tejas 7 years, 10 months ago

    CBSE > Class 08 > Science
    • 1 answers

    Mansha Puri 7 years, 10 months ago

    Chromosomes are thread like structure made up of proteins and DNA .

    1Thank You

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    • Posted by Hardika Aggarwal 7 years, 10 months ago

    CBSE > Class 08 > Science
    • 0 answers
    ANSWER

    • Posted by Ash Chsuhan 7 years, 10 months ago

    CBSE > Class 08 > Science
    • 1 answers

    Arnav Raj 7 years, 10 months ago

    Non metal

    1Thank You

    ANSWER

    • Posted by Shakti Swarup Pradhan 7 years, 10 months ago

    CBSE > Class 08 > Science
    • 1 answers

    Yogita Ingle 7 years, 10 months ago

    1. In the extraction of metals: The electrolysis of the molten chlorides or oxides of reactive metals like sodium, calcium, magnesium and aluminum, gives the metal. For example, sodium metal is obtained by the electrolysis of molten sodium chloride. Similarly, aluminium is obtained by the electrolysis of molten aluminium oxide (A12O3). In each case, metal is deposited at the cathode.
    2. Refining of metals: Metals like zinc, copper and aluminium are refined by the electrolysis of aqueous solution of a salt of the metal concerned.
    3. Electroplating: One of the important uses of electrolysis is in electroplating. The process of depositing a thin layer of a superior metal over the surface of an inferior metal with the help of electric current is known as electroplating.

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    • Posted by Sourabh Meena 7 years, 10 months ago

    CBSE > Class 08 > Science
    • 1 answers

    Rishabh Pandey 7 years, 10 months ago

    331.2 metres per second.

    1Thank You

    ANSWER

    • Posted by Sourabh Meena 7 years, 10 months ago

    CBSE > Class 08 > Science
    • 2 answers

    Rishabh Pandey 7 years, 10 months ago

    Size of a cell in human body is millionth of a metre(micrometre or micron).

    1Thank You

    Arnav Raj 7 years, 10 months ago

    Size of a full stop(.)

    0Thank You

    ANSWER

    • Posted by Mehak Mehak 7 years, 10 months ago

    CBSE > Class 08 > Science
    • 0 answers
    ANSWER

    • Posted by Himanshu Rathi 7 years, 10 months ago

    CBSE > Class 08 > Science
    • 2 answers

    Abhishek Jha 7 years, 10 months ago

    There are more than two ways of reducing friction: a.by polishing the surface(the another the surface the lesser is the friction) b.by oiling the surface(by oiling the surface the surface becomes smoother and also prevents the direct contact between the two surfaces by filling up the dents and forming a film over the surface) c.using ball bearings or roller bearings(if we use ball bearings then the sliding friction is converted to rolling friction and since rolling friction is less than sliding friction the frictiokn reduces) *rolling friction is less then sliding friction because the point of contact between the two surfaces is less and thus the interlocking between them also decrea see resulting in the decrease in the frictional force

    1Thank You

    Aarish Adhitya 7 years, 10 months ago

    *by polishing the surface *By adding wheels to the object *Streamlined body structure

    1Thank You

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    • Posted by Himanshu Rathi 7 years, 10 months ago

    CBSE > Class 08 > Science
    • 0 answers
    ANSWER

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