No products in the cart.

Ask questions which are clear, concise and easy to understand.

Ask Question

    • Posted by Archana Mate 6 years, 9 months ago

    CBSE > Class 08 > Science
    • 2 answers

    Kanvi ..?? 6 years, 9 months ago

    Substances that burn in air or oxygen to produce heat and light are called combustible substances.Examples are :paper,wood,kerosene,and LPG. Substances that do not burn in air or oxygen to produce heat & light are called non-combustible substances.Examples are:water,sand,glass,and cement.

    2Thank You

    Kavita Arora 6 years, 9 months ago

    A combustible substance catches fire easily and produse heat and light enery. A non combustible substance do not catches fire easily.

    2Thank You

    ANSWER

    • Posted by Archana Mate 6 years, 9 months ago

    CBSE > Class 08 > Science
    • 2 answers

    Kanvi ..?? 6 years, 9 months ago

    The process of burning of a substance in the presence of air and oxygen with the liberation of heat & light is called combustion. The following conditions are necessary for combustion to take place. PRESENCE OF A COMBUSTIBLE SUBSTANCE:Combustion is only possible if the substance is combustible. PRESENCE OF A SUPPORTER OF COMBUSTION:The adequate supply of a supporter of combustion(e.g.,oxygen) is essential for combustion. ATTAINMENT OF IGNITION TEMPERATURE:A substance starts to burn only after it has attained a certain minimum temperature.The temperature at which a particular substance burns in the presence of air is called its ignition temperature. A substance can not catch fire if its temperature is low than its ignition temperature.

    1Thank You

    Yogita Ingle 6 years, 9 months ago

    The chemical process in which a substance reacts with oxygen to give off heat is called combustion.
    Conditions necessary for Combustion
    There are three conditions which are necessary for combustion to take place.
    1.Presence of a combustible substance. That is, a substance which can burn.
    2.Presence of a supporter of combustion like presence of oxygen in air.
    3.Heating the combustible substance to its ignition temperature.

    If any of these conditions is not met, combustion does not take place.

    1Thank You

    ANSWER

    • Posted by Lavish Kanyal 6 years, 9 months ago

    CBSE > Class 08 > Science
    • 1 answers

    Pinky Jethwani 6 years, 9 months ago

    Which formulae?

    0Thank You

    ANSWER

    • Posted by Archana Mate 6 years, 9 months ago

    CBSE > Class 08 > Science
    • 2 answers

    Kanvi ..?? 6 years, 9 months ago

    Phosphorus & Nitrogen.

    2Thank You

    Mahek Gupta 6 years, 9 months ago

    Nitrogen and phosphorus

    2Thank You

    ANSWER

    • Posted by Archana Mate 6 years, 9 months ago

    CBSE > Class 08 > Science
    • 1 answers

    K Raja 6 years, 9 months ago

    Phorsphours and nitrogen

    0Thank You

    ANSWER

    • Posted by Tirthesh Solanki 6 years, 9 months ago

    CBSE > Class 08 > Science
    • 1 answers

    Gaurav Talekar 6 years, 9 months ago

    The star forming a group which have recognisable shape is called constillation

    0Thank You

    ANSWER

    • Posted by Abhijith C D 6 years, 9 months ago

    CBSE > Class 08 > Science
    • 1 answers

    Abhijith C D 6 years, 9 months ago

    Answer

    0Thank You

    ANSWER

    • Posted by Abhijith C D 6 years, 9 months ago

    CBSE > Class 08 > Science
    • 1 answers

    Anupam Mishra 6 years, 9 months ago

    Pole star is a star that appears stationary to our earth. Other stars move from west to east as our earth move from east to west but pole star(dhruv tara) is the only star which appears stationary to us because it lies on the orbit of the earth.

    1Thank You

    ANSWER

    • Posted by Singh Apple Notebook Pvt. Ltd. 6 years, 9 months ago

    CBSE > Class 08 > Science
    • 3 answers

    Kanvi ..?? 6 years, 9 months ago

    Calorific value of a fuel is defined as the amount of heat produced in kilojoules when one gram of a fuel is completely burned.The unit for representing calorific value is kolojoules(kJ).Calorific value is expressed in kJ/g.

    1Thank You

    Anupam Mishra 6 years, 9 months ago

    Kilogram per joule kg/j

    0Thank You

    Nagaraju Iragaraju 6 years, 9 months ago

    The units of calorific value units are kilojoule per kg

    0Thank You

    ANSWER

    • Posted by Bhavika Phophalia 6 years, 9 months ago

    CBSE > Class 08 > Science
    • 1 answers

    Meghna Thapar 5 years, 10 months ago

    The friction whenever an object moves through a fluid is called fluid friction. Liquids and gases are fluids. Air exerts frictional force on cars, buses, aeroplanes, rockets, birds, etc. moving through it. Water exerts frictional force on objects like boats, speedboats, ships, fish, etc. which move through it.

    The force which always opposes the motion of one body over another body is called frictional force or friction.

    0Thank You

    ANSWER

    • Posted by Ritik Rqj 6 years, 9 months ago

    CBSE > Class 08 > Science
    • 2 answers

    Arpan Tiru 6 years, 9 months ago

    earthquake occur because of sudden shaking or trembling of the plates of ?

    0Thank You

    Surya Pratap 6 years, 9 months ago

    When are disbalanced then earthquakes occure

    3Thank You

    ANSWER

    • Posted by Ankush From Bhind 6 years, 9 months ago

    CBSE > Class 08 > Science
    • 3 answers

    Arpan Tiru 6 years, 9 months ago

    The force which is developed when it is in contact with an object. It is divided into 2 forces 1)muscular force 2)frictional force

    0Thank You

    Lakshay Jain 6 years, 9 months ago

    It is the type of force in which act when to surface touch each other

    1Thank You

    Tanjil Wazed 6 years, 9 months ago

    The force in which two bodies come in contact or touch with each other is called contact force

    3Thank You

    ANSWER

    • Posted by Deepa Dasan 6 years, 9 months ago

    CBSE > Class 08 > Science
    • 2 answers

    Isha Singh 6 years, 9 months ago

    The passage through the liquid causes heating just as it does in solid .more importantly chemical activity may be see...

    1Thank You

    Richa Shree 6 years, 9 months ago

    When a solution starts to conduct electricity or causes changes in it after passing of electricity is chemical effect of current.

    2Thank You

    ANSWER

    • Posted by Abhay Rana 6 years, 9 months ago

    CBSE > Class 08 > Science
    • 1 answers

    Meghna Thapar 5 years, 6 months ago

    A register may hold a computer instruction , a storage address, or any kind of data (such as a bit sequence or individual characters). Some instructions specify registers as part of the instruction. A diode is a specialized electronic component with two electrodes called the anode and the cathode. 

    Diodes can be used as rectifiers, signal limiters, voltage regulators, switches, signal modulators, signal mixers, signal demodulators, and oscillators. The fundamental property of a diode is its tendency to conduct electric current in only one direction.

    0Thank You

    ANSWER

    • Posted by Abhay Rana 6 years, 9 months ago

    CBSE > Class 08 > Science
    • 1 answers

    Meghna Thapar 5 years, 6 months ago

    The current in a circuit is directly proportional to the electric potential difference impressed across the circuit and inversely proportional to the resistance of the circuit. Reducing the current can be done by reducing the voltage (choice A) or by increasing the resistance. In order to lower the amperage of an electrical circuit, you must either lower the circuit's voltage or increase its resistance. Lowering amperage is done by applying Ohm's law, given by the formula I = V/R, where I is the circuit's total current in amperes, V is the voltage and R is the resistance. Current limiting is the practice in electrical or electronic circuits of imposing an upper limit on the current that may be delivered to a load with the purpose of protecting the circuit generating or transmitting the current from harmful effects due to a short-circuit or similar problem in the load.

    0Thank You

    ANSWER

    • Posted by Nagaraju Iragaraju 6 years, 9 months ago

    CBSE > Class 08 > Science
    • 2 answers

    K Raja 6 years, 9 months ago

    On 1665

    0Thank You

    Singh Apple Notebook Pvt. Ltd. 6 years, 9 months ago

    28 july 1635

    1Thank You

    ANSWER

    • Posted by Deepak Kaushik 6 years, 9 months ago

    CBSE > Class 08 > Science
    • 3 answers

    Arpan Tiru 6 years, 9 months ago

    Smog is made by smoke + fog it is a thick fog like layer in the atmosphere during winters smoke contains oxides of Nitrogen with combined with other air pollutant and fog to form smog

    0Thank You

    Isha Singh 6 years, 9 months ago

    Mixture of smoke and fog

    4Thank You

    Nagaraju Iragaraju 6 years, 9 months ago

    The combination of smoke and fog

    2Thank You

    ANSWER

    • Posted by Nagaraju Iragaraju 6 years, 9 months ago

    CBSE > Class 08 > Science
    • 2 answers

    Aman Nehra 6 years, 9 months ago

    Nucleolus

    1Thank You

    Vidya Ny 5 years, 8 months ago

    Nucleus

    1Thank You

    ANSWER

    • Posted by Nagaraju Iragaraju 6 years, 9 months ago

    CBSE > Class 08 > Science
    • 2 answers

    Vidya Ny 6 years, 9 months ago

    Nucleus

    1Thank You

    Om Kumar 6 years, 9 months ago

    Nucleolus

    2Thank You

    ANSWER

    • Posted by Nagaraju Iragaraju 6 years, 9 months ago

    CBSE > Class 08 > Science
    • 4 answers

    K Raja 6 years, 9 months ago

    Rober hook discovered the cell

    0Thank You

    Arpan Tiru 6 years, 9 months ago

    Anton Van leeuwenhoek discovered cell

    0Thank You

    Om Kumar 6 years, 9 months ago

    Anti Leewen hook

    1Thank You

    Rashi Aggarwal 6 years, 9 months ago

    Robert hook

    2Thank You

    ANSWER

    • Posted by Anwesha Tiwari 6 years, 9 months ago

    CBSE > Class 08 > Science
    • 0 answers
    ANSWER

    • Posted by Vidya Ny 6 years, 9 months ago

    CBSE > Class 08 > Science
    • 1 answers

    Happy Happy 6 years, 9 months ago

    5

    4Thank You

    ANSWER

    • Posted by Priyanshu Kumar 6 years, 9 months ago

    CBSE > Class 08 > Science
    • 3 answers

    Nagaraju Iragaraju 6 years, 9 months ago

    The fusion of male and female is called fertilization

    1Thank You

    Ankush From Bhind 6 years, 9 months ago

    The fusion of male(sperm) and female(ovum) is called fertilisation

    2Thank You

    Nagaraju Iragaraju 6 years, 9 months ago

    The combination of sugar and alcohol

    2Thank You

    ANSWER

    • Posted by Sahil Singh Thakur 6 years, 9 months ago

    CBSE > Class 08 > Science
    • 2 answers

    Birender Singh Bhati 6 years, 9 months ago

    Sorry it is of meteorite

    1Thank You

    Birender Singh Bhati 6 years, 9 months ago

    Some meteors are large and they can reach the earth before they evaporate completely . The body that reaches the earth is called a meteorite.

    1Thank You

    ANSWER

    • Posted by Mansi Harne 6 years, 9 months ago

    CBSE > Class 08 > Science
    • 1 answers

    Singh Apple Notebook Pvt. Ltd. 6 years, 9 months ago

    Meteoroids are small , rocky , irregular heavenly bodies which revolve around the sun

    1Thank You

    ANSWER

    • Posted by Divyansh Sharma 6 years, 9 months ago

    CBSE > Class 08 > Science
    • 3 answers

    Arpan Tiru 6 years, 9 months ago

    6 ARE YOU A SMALL KID OF KINDER GARDEN. ??

    1Thank You

    Abhishek Panda 6 years, 9 months ago

    6

    0Thank You

    Aditya Sonawane ? Dae Colony 6 years, 9 months ago

    Are you class 1

    0Thank You

    ANSWER

    • Posted by Mili Reang 6 years, 9 months ago

    CBSE > Class 08 > Science
    • 1 answers

    Mithali Pattanaik 6 years, 9 months ago

    The aurora borealias(northern lights) from charged particles emitted from the sun during a solar flare penetrate the magnetic shield and collide with atmos and molecules in the atmosphere.These collisions result in countless little burst of light,called photons which maked the aroura.????

    3Thank You

    ANSWER

    • Posted by Sampat Ushir 6 years, 9 months ago

    CBSE > Class 08 > Science
    • 2 answers

    Sampat Ushir 6 years, 9 months ago

    Sent please

    0Thank You

    Ïmđãđ Ullah 6 years, 9 months ago

    Yes

    0Thank You

    ANSWER

    • Posted by Divyanshu Baghel 6 years, 9 months ago

    CBSE > Class 08 > Science
    • 1 answers

    Pooja K 6 years, 9 months ago

    Is where image forms image

    0Thank You

    ANSWER

    • Posted by Nandani Iiii 6 years, 9 months ago

    CBSE > Class 08 > Science
    • 2 answers

    Isha Singh 6 years, 9 months ago

    In 1885 to less the pollution of gange coz ganga is regarded as the most polluted river in india

    0Thank You

    Shivam Pandey 6 years, 9 months ago

    1885 i think

    1Thank You

    ANSWER

    myCBSEguide App

    myCBSEguide

    Trusted by 1 Crore+ Students

    Install Now

    Test Generator

    Test Generator

    Create papers online. It's FREE.

    Try Now

    CUET Mock Tests

    CUET Mock Tests

    75,000+ questions to practice only on myCBSEguide app

    Install Now
    Google Play

    Download myCBSEguide App

    All Courses

    Other Websites

    CBSE Courses

    Resources

    Corporate

    NCERT Solutions

    CBSE Sample Papers

    All Content and Intellectual Property is under Copyright Protection | myCBSEguide.com ©2007-2025