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    • Posted by Mukul Parwani 7 years, 2 months ago

    CBSE > Class 09 > Science
    • 1 answers

    Kashish Bansal 7 years, 2 months ago

    1. Oxygen in water 2. Air

    3Thank You

    ANSWER

    • Posted by Shabnam Khatoon 7 years, 2 months ago

    CBSE > Class 09 > Science
    • 3 answers

    Bedabyash Manasingh 7 years, 2 months ago

    Every action has an equal and opposite action

    1Thank You

    Gifty Rajesh 7 years, 2 months ago

    For any action there is an equal and opposite reaction and they act on two different bodies.

    0Thank You

    Kashish Bansal 7 years, 2 months ago

    Every action has equal and opposite reaction

    1Thank You

    ANSWER

    • Posted by .Yogitha . Dhanaji 7 years, 2 months ago

    CBSE > Class 09 > Science
    • 2 answers

    Pratyusha Samantaray 7 years, 2 months ago

    ,Mass of an object is constant and does not change from place to place while weight of an object is the force with which it is attracted towards earth. Weight change from place to place.

    3Thank You

    Yogita Ingle 7 years, 2 months ago

     
    Mass    		  
    Weight
     
    Mass is the quantity of matter
    contained in the body.    		  
    Weight is the force of gravity acting on the body.
     
    It is the measure of inertia of the body.    		  
    It is the measure of gravity.
     
    Mass is a constant quantity.    		  
    Weight is not a constant quantity. It is different at different places.
     
    It only has magnitude.    		  
    It has magnitude as well as direction.
     
    Its SI unit is kilogram (kg).    		  
    Its SI unit is the same as the SI unit of force, i.e., Newton (N).

    4Thank You

    ANSWER

    • Posted by Mukul Parwani 7 years, 2 months ago

    CBSE > Class 09 > Science
    • 3 answers

    Yogita Ingle 7 years, 2 months ago

    Sir Isaac Newton. Isaac Newton was born in 1643 and became famous for his work on gravity and his three laws of motion. He was also well known for his work on light and colour, and what is now called calculus (a branch of mathematics).

    1Thank You

    Crazy Boy 7 years, 2 months ago

    He is scientist who discovered laws of gravitation

    1Thank You

    .Yogitha . Dhanaji 7 years, 2 months ago

    Maths teacher

    0Thank You

    ANSWER

    • Posted by Muskan Mehta 7 years, 2 months ago

    CBSE > Class 09 > Science
    • 2 answers

    Akanksha Kumari 7 years, 2 months ago

    first you need to know what is soil .it is the very fine particles of rock which is made up of weathing of rock in the formation of rock to stage take place :- 1) weathring 2) humification

    2Thank You

    Yogita Ingle 7 years, 2 months ago

    Soil is a mixture of rock particles, minerals, decayed organic material, air, and water.  The formation of soil happens over a very long period of time and is majorly formed by the weathering of rock. Weathering in turn is the breaking down of huge pieces of rocks into smaller pieces by the action of natural forces, such as water, heat, glaciers, wind and roots of plants, etc.

    1Thank You

    ANSWER

    • Posted by Ritika Rawat 7 years, 2 months ago

    CBSE > Class 09 > Science
    • 0 answers
    ANSWER

    • Posted by Shivam Kumar 7 years, 2 months ago

    CBSE > Class 09 > Science
    • 3 answers

    Sandhya Saini 7 years, 1 month ago

    Vector quantity has magnitude as well as direction but scalar quantity has only magnitude

    1Thank You

    Rutuja Sugave 7 years, 2 months ago

    Vector quantity need both magnitude as well as direction and sclar guantity need only direction

    1Thank You

    Shailendra Singh 7 years, 2 months ago

    Vector quantity have magnitude but scaler quantity have no magnitude

    2Thank You

    ANSWER

    • Posted by Manju Gupta 7 years, 2 months ago

    CBSE > Class 09 > Science
    • 1 answers

    Arya Sankar 7 years, 2 months ago

    The contents of the cell would leaks out and it will die

    0Thank You

    ANSWER

    • Posted by Raveena Jakhu 7 years, 2 months ago

    CBSE > Class 09 > Science
    • 2 answers

    Aditya Rai??????? 7 years, 2 months ago

    Broilers give birth Layer lay eggs

    1Thank You

    Akshaya Kamaraj 7 years, 2 months ago

    Broilers. Layers They are grazied for meat. Eggs are produced by layers They are fed on environmentally they need sufficient space and Controlled broiler units. Lighting

    1Thank You

    ANSWER

    • Posted by Rahul Jha 7 years, 2 months ago

    CBSE > Class 09 > Science
    • 4 answers

    Aditya Rai??????? 7 years, 2 months ago

    Ch-4,7,9,10,13,14

    1Thank You

    Akanksha Kumari 7 years, 2 months ago

    chapters after half- yealy

    0Thank You

    Sudhanshu Kumar 7 years, 2 months ago

    3,7

    0Thank You

    Manani Chaudhary 7 years, 2 months ago

    Ch 3,4,10,14

    0Thank You

    ANSWER

    • Posted by Rahul Jha 7 years, 2 months ago

    CBSE > Class 09 > Science
    • 1 answers

    Yogita Ingle 7 years, 2 months ago

    Lymph is a clear, watery, sometimes yellowish fluid resembles blood plasma. It contains white blood cells and circulates in lymphatic system. It circulates through body tissues and pick up fats, bacteria, certain proteins and other unwanted materials. Lymph plays an important role in the defense mechanism of the body.

    1Thank You

    ANSWER

    • Posted by Gourav Chandela 7 years, 2 months ago

    CBSE > Class 09 > Science
    • 2 answers

    Akanksha Kumari 7 years, 2 months ago

    In his experiment Rutherford bamarded a thin sheet of gold foil with alphaparticles which was recorded on a florescent screen and reasut was obseved

    0Thank You

    Yogita Ingle 7 years, 2 months ago

    Steps in Rutherford's gold foil experiment to determine the structure of atom.
    1) A radiation source was placed in a lead box.
    2) A flow of alpha particles from the source was allowed to collide with a piece of gold foil.
    3) The flow of alpha particles through gold foil was recorded on a florescent screen.

    4Thank You

    ANSWER

    • Posted by Praful Saxena 7 years, 2 months ago

    CBSE > Class 09 > Science
    • 2 answers

    Harsh Dagar 7 years, 2 months ago

    Element is made from only one type of atom whereas compound is made from two or more type of atom.Element is pure substance whereas compound is impure.

    1Thank You

    Yogita Ingle 7 years, 2 months ago

    <th>

    Elements are pure substances which are composed of only one type of atom.

    Compound are substances which are formed by two or more different types of elements that are united chemically in fixed proportions.

    There are nearly 118 elements (at present) of which nearly 94 occur naturally on Earth.

    Compounds are almost endless.

    Elements are classified as either metals, nonmetals or metalloids.

    Compounds are classified according to their bonds which can be ionic, molecular or metallic.

    Some of the examples of elements are Iron, Copper, Gold, etc.

    A few examples of compounds are NaOH, NaCl, etc.

    Elements are represented by symbols and numbers. For example, Sodium is represented by Na.

    Compounds are represented by their chemical formula. For example, salt is represented by the formula NaCl.

    5Thank You

    ANSWER

    • Posted by Ratna Das 7 years, 2 months ago

    CBSE > Class 09 > Science
    • 1 answers

    Shristi Charan Pahari 7 years, 2 months ago

    Limitations are: 1) Rutherford's atomic model could not explain the stability of an atom. 2) He could not explain the distribution of electrons in circular path and circular path was not defined.

    3Thank You

    ANSWER

    • Posted by Aashi Sharma 7 years, 2 months ago

    CBSE > Class 09 > Science
    • 1 answers

    Sachin Kumar 7 years, 2 months ago

    This is because light travels faster than sound.speed of sound is 3*10^8 m/s whereas sound (20°C) is 343 m/s.

    2Thank You

    ANSWER

    • Posted by Khush Khush 7 years, 2 months ago

    CBSE > Class 09 > Science
    • 3 answers

    Saraj Bera 7 years, 2 months ago

    Annelida

    1Thank You

    Shristi Charan Pahari 7 years, 2 months ago

    Earthworm belongs to phylum annelida

    1Thank You

    Manani Chaudhary 7 years, 2 months ago

    Annelida

    1Thank You

    ANSWER

    • Posted by Kamakshi Singh 7 years, 2 months ago

    CBSE > Class 09 > Science
    • 4 answers

    Yashika Gupta 7 years, 2 months ago

    Teaching is the best exercise to learn and providing learning to other students so if there are any weak students who can't study their self the if you will teach them you will also remember yourself

    3Thank You

    Raveena Jakhu 7 years, 2 months ago

    You should read notes and extra questions then you are able to do you exam prepare

    1Thank You

    Manani Chaudhary 7 years, 2 months ago

    you should read the notes given in your class and practice different sample paper of science and also if you can then please help your classmates in their difficulties in this way you r able to do your exam preparation

    2Thank You

    Manani Chaudhary 7 years, 2 months ago

    You should prepare chemistry first then biology and then physics.

    1Thank You

    ANSWER

    • Posted by Pratham Chauhan 7 years, 2 months ago

    CBSE > Class 09 > Science
    • 2 answers

    Shristi Charan Pahari 7 years, 2 months ago

    Features of eathworm are: 1) they are triploblastic 2) they are coelomate 3) they have organ system organisation and are bilaterally symmetrical

    0Thank You

    Gaurav Seth 7 years, 2 months ago

    Earthworm belongs to the phylum Annelida.

    • They ate segmented from top to bottom  and bilaterally symmetrical.
    • Triploblastic and have true coelom.

    0Thank You

    ANSWER

    • Posted by Anupama Singh 7 years, 2 months ago

    CBSE > Class 09 > Science
    • 2 answers

    Manani Chaudhary 7 years, 2 months ago

    When some pythogan enter our body and our immune system does not able to fight against it then we fall ill

    1Thank You

    Aman Kumar 7 years, 2 months ago

    This is because when harmful bacterias enter our body the attack our immune system

    1Thank You

    ANSWER

    • Posted by Vanshika Sharma 7 years, 2 months ago

    CBSE > Class 09 > Science
    • 4 answers

    Manani Chaudhary 7 years, 2 months ago

    according to me it depends upon the depth of the fluid ,the density of the fluid and also I think acceleration of gravity

    0Thank You

    Yogita Ingle 7 years, 2 months ago

    Pressure is the force acting perpendicularly on unit area of the object.

    Pressure depends upon the factors that follows:-

    (1)It depends on force applied.

    (2)Area over in which force acts.

    The same force can produce different pressure depending upon area in which it acts.

    When the force acts over a large area,the pressure produced is less.

    Pressure = Force/Area

    0Thank You

    Faizur Rahman 7 years, 2 months ago

    Height and density of liquid prominently...

    0Thank You

    Akanksha Kumari 7 years, 2 months ago

    I think that liquid pressure depends on buoyant force

    1Thank You

    ANSWER

    • Posted by C G 7 years, 2 months ago

    CBSE > Class 09 > Science
    • 3 answers

    Akanksha Kumari 7 years, 2 months ago

    it can be separated by handpicking

    0Thank You

    Akanksha Kumari? 7 years, 2 months ago

    Hey solutions can't be separated by handpicking

    0Thank You

    Akanksha Kumari 7 years, 2 months ago

    to separate different solution follow the given method:- 1) handpicking 2) sieving 3) sublimation 4) By using sutaible solvent 5) winnowing 6) By magnet

    0Thank You

    ANSWER

    • Posted by Simran Das 7 years, 2 months ago

    CBSE > Class 09 > Science
    • 1 answers

    Yogita Ingle 7 years, 2 months ago

    Reverberation is the phenomenon of persistence of sound after it has been stopped as a result of multiple reflections from surfaces such as furniture, people, air etc. within a closed surface .

    Advantages of Reverberation

    Reverberations do wonders when it comes to musical symphonies and orchestra halls, when the right amount of reverberation is present, the sound quality gets enhanced drastically. This is the reason why sound engineers are appointed during the construction of these halls.

    1Thank You

    ANSWER

    • Posted by Ved Doshi 7 years, 2 months ago

    CBSE > Class 09 > Science
    • 2 answers

    Yashika Gupta 7 years, 2 months ago

    When you try to lift heavy weight but you aren't able to lift it and you will go down and in this condition the work done will be negative by yourself.

    1Thank You

    Abdul Rauf 7 years, 2 months ago

    When you're pushing an object along the floor, the work done by Kinetic Friction is negative. This is because friction acts in the opposite direction of relative motion. Now, since the direction of Frictional force and that of displacement is opposite, hence the work done here by the Frictional force is negative.

    2Thank You

    ANSWER

    • Posted by Subhash Pandey 7 years, 2 months ago

    CBSE > Class 09 > Science
    • 0 answers
    ANSWER

    • Posted by Sangita???? Ankita 7 years, 2 months ago

    CBSE > Class 09 > Science
    • 1 answers

    Ayush Balyan 7 years, 2 months ago

    The above statement is correct as the sum of proton and nuetron gives the atomic mass and proton and nuetron are situated in the centre

    3Thank You

    ANSWER

    • Posted by Sangita???? Ankita 7 years, 2 months ago

    CBSE > Class 09 > Science
    • 2 answers

    Akanksha Kumari 7 years, 2 months ago

    Your answer is quite wrong i am agry that he need a thin sheat of mater .but gold foil was not 1000 atoms thik it was 0.00006 cm thin.

    0Thank You

    Ayush Balyan 7 years, 2 months ago

    Because he want a thin layer as possible and this gold foil was 1000 atoms thick

    3Thank You

    ANSWER

    • Posted by Asha Joy 7 years, 2 months ago

    CBSE > Class 09 > Science
    • 2 answers

    Aastha Singhal 7 years, 2 months ago

    Antibiotics are chemical substances produced by living organisms such as bacteria and fungi etc which can kill or stop the growth of some disease producing microorganisms such as bacteria and fungi example penicillin and rifampicin

    0Thank You

    Vijay Pandey 7 years, 2 months ago

    Antibiotics are the biochemical produced by a microorganisms (eg: bacteria) which kills or block the growth of other microorganisms (pathogens) by blocking their life processes without harming the human cells. Example : 1) penicillin 2) streptomycin

    0Thank You

    ANSWER

    • Posted by Sangita???? Ankita 7 years, 2 months ago

    CBSE > Class 09 > Science
    • 2 answers

    Akanksha Kumari 7 years, 2 months ago

    the advantages of Italian bee are :- 1) it is gentle in nature. 2) it has good collecting capacity. 3) it has the ability to protect itself.

    0Thank You

    Gaurav Seth 7 years, 2 months ago

    Advantages of Italian bee over Indian bee:-

    1. They produce average of 25-30 kg of honey per colony where as Indian bee produce only 5-6 kg.

    2. They are less prone to swarming and absconding where as Indian bee are more prone to these.

    3. They are bigger in size 

    <hr />

    In composite fish culture, several fast growing compatible fish species are grown together in a pond.

    Advantages:

    i) Maximum fish production is obtained in this method, with lesser cost.

    ii) All ecological zones are exploited for achieving maximum yield.

    iii) All available food in the pond is effectively utilised.

    iv) The variety of fish produced is much higher as compared to monoculture.

    1Thank You

    ANSWER

    • Posted by Sangita???? Ankita 7 years, 2 months ago

    CBSE > Class 09 > Science
    • 1 answers

    Gaurav Seth 7 years, 2 months ago

    3Thank You

    ANSWER

    • Posted by Harsh Rana 7 years, 2 months ago

    CBSE > Class 09 > Science
    • 1 answers

    Aastha Singhal 7 years, 2 months ago

    Monocot that cannot divided into two halves while dicot means that can divided into two halves example of dicot r groundnut an example of monocot is wheat

    0Thank You

    ANSWER

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