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    • Posted by Arpit Singh 2 years, 11 months ago

    CBSE > Class 09 > Science
    • 3 answers

    Ganesh P 2 years, 11 months ago

    Chemistry is often referred to as the central science because it joins together physics and mathematics, biology and medicine, and the earth and environmental sciences. Knowledge of the nature of chemicals and chemical processes therefore provides insights into a variety of physical and biological phenomena.

    0Thank You

    D K 2 years, 11 months ago

    Because in chemistry you are study about properties and behaviors matter

    0Thank You

    Rishipal Singh 2 years, 11 months ago

    Something which we need to study it becomes a subject

    0Thank You

    ANSWER

    • Posted by Nothing Is Best 2 years, 11 months ago

    CBSE > Class 09 > Science
    • 5 answers

    Sweety Yadav 2 years, 11 months ago

    Cork

    6Thank You

    Sweety Yadav 2 years, 11 months ago

    Bark (protective tissue )

    1Thank You

    01_Aadeet Pataliya_Ix-B 2 years, 11 months ago

    Scalernchyma

    0Thank You

    Shiva Singh 2 years, 11 months ago

    Photosynthesis

    3Thank You

    Shivam Kumar 2 years, 11 months ago

    Scleranchyma

    3Thank You

    ANSWER

    • Posted by Parineeti Singh 2 years, 11 months ago

    CBSE > Class 09 > Science
    • 2 answers

    Param Sidhu 2 years, 10 months ago

    There are many differences such as their chemical entities and number of moles number of moles in 18 gram of ch4 are more as compared to 18 g of co4 in chemistry same weight or mass doesn't mean they are are equal

    1Thank You

    Vishal Singh 2 years, 11 months ago

    No of moles in 18g of CH4 has more than CO2

    1Thank You

    ANSWER

    • Posted by Atharva Dum 2 years, 11 months ago

    CBSE > Class 09 > Science
    • 5 answers

    Priyanshu Anand 2 years, 11 months ago

    Mixture

    0Thank You

    Vishal Singh 2 years, 11 months ago

    Mixture

    0Thank You

    Nitin Sharma 2 years, 11 months ago

    Mixture

    1Thank You

    Dnyan Khambadkar 2 years, 11 months ago

    Mixture

    2Thank You

    Rishika Rawat 2 years, 11 months ago

    Solution: Air is a mixture and not a compound because: Air does not have a formula like a mixture, while compounds have a fixed formula. When air is formed by gases, there is no energy change. Properties of air are variable and subjective to time and place.

    2Thank You

    ANSWER

    • Posted by Priyanka Kumari 2 years, 11 months ago

    CBSE > Class 09 > Science
    • 4 answers

    Vishal Singh 2 years, 11 months ago

    Total momentum before collision=total momentum after collision.

    0Thank You

    Dnyan Khambadkar 2 years, 11 months ago

    Mometum. Before Collision =Momentum After Collision

    1Thank You

    Rishika Rawat 2 years, 11 months ago

    An example of law of conservation of momentum is Newton's cradle, a device where, when one ball is lifted and then let go, the ball on the other end of a row of balls will push upward. ...

    0Thank You

    Naveen Sharma 2 years, 11 months ago

    Law of conservation of momentum shows that a object will remain in motion until any external force is not applied example : cradle .

    1Thank You

    ANSWER

    • Posted by Usha Suresh 2 years, 11 months ago

    CBSE > Class 09 > Science
    • 3 answers

    Abhay Dubey 2 years, 11 months ago

    There is a external force of earth called gravity

    0Thank You

    Vishal Singh 2 years, 11 months ago

    All the objects in our universe attract each other with a force of attraction called gravitation

    0Thank You

    Smrity Verma 2 years, 11 months ago

    Every object in the universe attracts every other object with a force of attraction which is known as grarvitation

    2Thank You

    ANSWER

    • Posted by Nitish Yadav Nitish Yadav 2 years, 11 months ago

    CBSE > Class 09 > Science
    • 1 answers

    Mandeep Kaur 2 years, 11 months ago

    Why do we have to use the s=ut+1/2 at^2 formula? The mathematically proven equations are as follows (1) First equation of Motion: V = u + at soln. Consider a body of mass “m” having initial velocity “u”.Let after time “t” its final velocity becomes “v” due to uniform acceleration “a”. Now we know that: Acceleration = change in velocity/Time taken => Acceleration = Final velocity-Initial velocity / time taken => a = v-u /t =>at = v-u or v = u + at This is the first equation of motion. (2) Second equation of motion: s = ut + 1/2 at^2 sol. Let the distance travelled by the body be “s”. We know that Distance = Average velocity X Time Also, Average velocity = (u+v)/2 .: Distance (t) = (u+v)/2 X t …….eq.(1) Again we know that: v = u + at substituting this value of “v” in eq.(2), we get s = (u+u+at)/2 x t =>s = (2u+at)/2 X t =>s = (2ut+at^2)/2 =>s = 2ut/2 + at^2/2 or s = ut +1/2 at^2 This is the 2nd equation of motion. Hope u got it.

    4Thank You

    ANSWER

    • Posted by Nitish Yadav Nitish Yadav 2 years, 11 months ago

    CBSE > Class 09 > Science
    • 2 answers

    Rishika Rawat 2 years, 11 months ago

    For a collision occurring between object 1 and object 2 in an isolated system, the total momentum of the two objects before the collision is equal to the total momentum of the two objects after the collision. That is, the momentum lost by object 1 is equal to the momentum gained by object 2.

    1Thank You

    Yashi Choudhary 2 years, 11 months ago

    Conservation of momentum, general law of physics according to which the quantity called momentum that characterizes motion never changes in an isolated collection of objects; that is, the total momentum of a system remains constant.

    1Thank You

    ANSWER

    • Posted by Nitish Yadav Nitish Yadav 2 years, 11 months ago

    CBSE > Class 09 > Science
    • 4 answers

    Balkrishna Mishra 2 years, 11 months ago

    Rate of change of momentum is directly proportional to unbalanced force applied on it

    1Thank You

    Nivethitha Maheswaran 2 years, 11 months ago

    The rate of change of momentum is directly proportional to the applied unbalanced force in the direction of force

    2Thank You

    Sanket ... 2 years, 11 months ago

    F = m × a

    1Thank You

    Saloni Sharma 2 years, 11 months ago

    The applied force is directly proportional to the rate of change of linear momentum

    1Thank You

    ANSWER

    • Posted by Pal Shah 2 years, 11 months ago

    CBSE > Class 09 > Science
    • 2 answers

    Sia ? 2 years, 11 months ago

    Theory that cells are the basic structural, functional, and organizational units of both single-celled and multicellular organisms; cells divide and pass on hereditary information; and energy flows within cells.

    0Thank You

    Vishal Singh 2 years, 11 months ago

    All living organisms made up of cell. Cell is structural and functional unit of life. All cells arises from pre existing cell.

    0Thank You

    ANSWER

    • Posted by Bismanpreet Singh 2 years, 11 months ago

    CBSE > Class 09 > Science
    • 2 answers

    Vishal Singh 2 years, 11 months ago

    The cell wall of collenchyma is composed for the deposition of extra cellulose at corner. It provide elasticity to the plant. The cell wall of sclerenchyma is made up of extra deposition of lignin at corner. It provide mechanical strength to the plant.

    0Thank You

    Alice !! 2 years, 11 months ago

    Collenchyma; .Consist of cell .Intercellular space is not present. .Cell tightly packed. .Deposition of pectin in cell. .Provide flexibility. Sclerenchyma; . Consist of dead cell. .Intercellular space is not present. .cell tightly packed. .Deposition of liginin in cell. . provide hardness.

    0Thank You

    ANSWER

    • Posted by Gagandeep Kaur 2 years, 11 months ago

    CBSE > Class 09 > Science
    • 2 answers

    Alka Darade 2 years, 11 months ago

    Answer is) Both assertion and reason are true but reason is not correct explaintion of assertion

    1Thank You

    Kumkum Sharma Kumkum Sharma 2 years, 11 months ago

    Yes

    1Thank You

    ANSWER

    • Posted by Satyam Singh 2 years, 11 months ago

    CBSE > Class 09 > Science
    • 5 answers

    Mànyà Jain 2 years, 10 months ago

    Collenchyma

    0Thank You

    D K 2 years, 11 months ago

    Collenchyma

    0Thank You

    Vishal Singh 2 years, 11 months ago

    Collenchyma

    0Thank You

    Chandana Kumari 2 years, 11 months ago

    Collenchyma

    0Thank You

    Sanchit Sharma 2 years, 11 months ago

    Collenchyma

    2Thank You

    ANSWER

    • Posted by Satyam Singh 2 years, 11 months ago

    CBSE > Class 09 > Science
    • 1 answers

    Sia ? 2 years, 11 months ago

    Where are the options?

    0Thank You

    ANSWER

    • Posted by Dipika Kumari 2 years, 11 months ago

    CBSE > Class 09 > Science
    • 5 answers

    Vishal Singh 2 years, 11 months ago

    Inertia of motion.

    0Thank You

    Chandana Kumari 2 years, 11 months ago

    (a) inertia of motion

    0Thank You

    Ashvini Pandey 2 years, 11 months ago

    Inertia of motion

    0Thank You

    Md Zaid Ali 2 years, 11 months ago

    À

    0Thank You

    Dipika Kumari 2 years, 11 months ago

    (a) inertia of motion

    2Thank You

    ANSWER

    • Posted by Ananya Kathpalia 2 years, 11 months ago

    CBSE > Class 09 > Science
    • 1 answers

    Sia ? 2 years, 11 months ago

    Cannot be changed

    0Thank You

    ANSWER

    • Posted by Anisha Choudhary 2 years, 11 months ago

    CBSE > Class 09 > Science
    • 1 answers

    Sia ? 2 years, 11 months ago

    silver bromide is a pure substance because it is made up of silver and bromine and free from another kind of mixtures.

    0Thank You

    ANSWER

    • Posted by Aayu Agastya 2 years, 11 months ago

    CBSE > Class 09 > Science
    • 0 answers
    ANSWER

    • Posted by Praveen Bhargav 2 years, 11 months ago

    CBSE > Class 09 > Science
    • 2 answers

    Sia ? 2 years, 11 months ago

    Let the mass of sodium sulphate required be 'x' g
    The mass of water = 100 g
    The mass of solution =(mass of sodium sulphate + mass of water) = (x + 100)g
    Percentage of sodium sulphate in solution {tex}=\;\frac{Mass\;of\;sodium\;sulphate}{Mass\;of\;solution}\times100{/tex}
    {tex}20=\frac{x}{x+100} \times 100{/tex}
    20x + 2000 = 100x 
    80x = 2000
    x = {tex}\frac{2000}{80}{/tex}
    = 25 g
    Therefore,  the mass of sodium sulphate required is 25 g.

    1Thank You

    Praveen Bhargav 2 years, 8 months ago

    Thanks

    0Thank You

    ANSWER

    • Posted by Creative Boy 2 years, 11 months ago

    CBSE > Class 09 > Science
    • 1 answers

    Vansh Gupta Gupta 2 years, 11 months ago

    Google pe search kat

    2Thank You

    ANSWER

    • Posted by Ayushi Chaudhary 2 years, 11 months ago

    CBSE > Class 09 > Science
    • 0 answers
    ANSWER

    • Posted by Nikita Bhiduri 2 years, 11 months ago

    CBSE > Class 09 > Science
    • 5 answers

    Nikita Bhiduri 2 years, 11 months ago

    Thanks to all

    1Thank You

    Annie Sharma 2 years, 11 months ago

    Average Velocity = total distance/ total time = (20+30+10) / (1+1+1) = 60/3 = 20 Km/h

    1Thank You

    Shubham Kumar 2 years, 11 months ago

    20km/h

    2Thank You

    Aman Kumar 2 years, 11 months ago

    60/3=20km/h

    1Thank You

    Samridhi Goyal 2 years, 11 months ago

    See train moves straight so distance and displacement are same Average velocity=total displacement/total time taken So 20+30+10/1+1+1 =60/3 =20 m/s so according to me it should be 20

    1Thank You

    ANSWER

    • Posted by Mohammed Junaid T.K Patel 2 years, 11 months ago

    CBSE > Class 09 > Science
    • 2 answers

    Nikita Bhiduri 2 years, 11 months ago

    Option nahi aa raha upload karne ka

    0Thank You

    Vipin Verma 2 years, 11 months ago

    How to practice of exam

    1Thank You

    ANSWER

    • Posted by Murali Krishna. G 2 years, 11 months ago

    CBSE > Class 09 > Science
    • 1 answers

    Khushboo Pathan 2 years, 11 months ago

    Name types of simple tissues.

    0Thank You

    ANSWER

    • Posted by Sarita Gupta 2 years, 11 months ago

    CBSE > Class 09 > Science
    • 2 answers

    Annie Sharma 2 years, 11 months ago

    Man pushes water in the backward direction with a force, an equal amount of force is applied by water on the man in the forward direction. Newton's third law of motion.

    1Thank You

    Mohammed Junaid T.K Patel 2 years, 11 months ago

    By kicking hands and legs OK

    2Thank You

    ANSWER

    • Posted by Anak Yadav 2 years, 11 months ago

    CBSE > Class 09 > Science
    • 2 answers

    Sia ? 2 years, 11 months ago

    It is the cells which is present in the blood that helps the blood to stop running out of body. They make a clot to stop the blood.

    1Thank You

    Vansh Gupta Gupta 2 years, 11 months ago

    Platelets, or thrombocytes, are small, colorless cell fragments in our blood that form clots and stop or prevent bleeding. Platelets are made in our bone marrow, the sponge-like tissue inside our bones.

    1Thank You

    ANSWER

    • Posted by Pooja Devi 2 years, 11 months ago

    CBSE > Class 09 > Science
    • 2 answers

    Suraj Singh 2 years, 11 months ago

    J.J Thomas was Greek scientist .he is known for his invention of cathod rays

    0Thank You

    Arshad Ali Nohary 2 years, 11 months ago

    Structure of the atom

    0Thank You

    ANSWER

    • Posted by Prateek Gupta 2 years, 11 months ago

    CBSE > Class 09 > Science
    • 0 answers
    ANSWER

    • Posted by Dhruv Mendiratta 2 years, 11 months ago

    CBSE > Class 09 > Science
    • 1 answers

    Shubham Kumar 2 years, 11 months ago

    Water=H2O

    0Thank You

    ANSWER

    • Posted by Priyanka Kumari 2 years, 11 months ago

    CBSE > Class 09 > Science
    • 2 answers

    Priyanka Kumari 2 years, 11 months ago

    Thank u

    1Thank You

    Divya Jyoti Das 2 years, 11 months ago

    Parenchyma-1)They are loosely arranged. 2)They are made up of living cells. 3)It stores food. 4)It also provides mechanical support to plants. Collenchyma-1) There is very little intercellular space. 2)They are made up of living cells. 3)It provides flexibility to plants. 4) It also provides mechanical support to plants. Sclerenchyma-1) There is no intercellular spaces. 2) They are made up of dead cells. 3) It provides hardness and stiffness as well as strength to plants. 4) It also provides mechanical support to plants. Thank you??

    3Thank You

    ANSWER

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