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    • Posted by Ayush Rawat 5 years, 2 months ago

    CBSE > Class 09 > Science
    • 1 answers

    Tanu Prajapati 5 years, 2 months ago

    m=mass u=initial velocity v= final velocity Now, m1= 1500kg m2=1000kg u1=25m/s u2=15m/s v1=20m/s v2=? Formula m1u1+m2u2= m1v1+m2+v2 1500*25+1000*15= 1500*20+1000*v2 37500+15000=30000+1000v2 52500=30000+1000v2 52500-3000=1000v2 22500=1000v2 22500/1000=v2 v2= 22.5m/s Thus, velocity of car 'B' after collision is 22.5m/s.

    0Thank You

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    • Posted by Suman Kumar 5 years, 2 months ago

    CBSE > Class 09 > Science
    • 2 answers

    Yogita Ingle 5 years, 2 months ago

    To achieve the room temperature, the ice at 273 K will absorb latent heat as well as thermal energy. Water at a temperature of 273 K would just absorb heat energy to achieve room temperature. Thus, water at 273 K will absorb less environmental heat energy than ice at 273 K. Therefore ice at 273 K more effective in cooling than water at the same temperature.

    0Thank You

    Suman Kumar 5 years, 2 months ago

    Ice at 273k has less energy than water (although both are at the same temperature)water possesses the addtional latent heat of fusion Hence ,at 273k ,ice is more effective in colling than water

    0Thank You

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    • Posted by Meghan Shah 5 years, 2 months ago

    CBSE > Class 09 > Science
    • 0 answers
    ANSWER

    • Posted by Jitu Machhar 36 5 years, 2 months ago

    CBSE > Class 09 > Science
    • 3 answers

    Anmol Raushan 5 years, 2 months ago

    CFC - Chlorofluorocarbon

    0Thank You

    Shivansh Khare 5 years, 2 months ago

    chlorofluorocarbons

    0Thank You

    Khadija Khan Khan 5 years, 2 months ago

    Air pollution and factory's chemical

    2Thank You

    ANSWER

    • Posted by Palak Pandey 5 years, 2 months ago

    CBSE > Class 09 > Science
    • 2 answers

    Palak Pandey 5 years, 2 months ago

    Thanks Anushka ?

    0Thank You

    Anushka Agarwal 5 years, 2 months ago

    See! For your convenience, you can even write ratio form into a for of division! So it will be like: 40/12/48 Now, these numbers can be divisible only when each no. is divisible by the same no., here, the no. is 4! So, when we divide 40 by 4, we get 10. 12 by 4=3 48 by 4=12 And thus, the ans= 10:3:12 Hope it helps!!

    1Thank You

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    • Posted by Trishla Jain 5 years, 2 months ago

    CBSE > Class 09 > Science
    • 1 answers

    Student 10Th 5 years, 2 months ago

    Conservation of linear momentum gives, m 1 ​ v 1 ​ +m 2 ​ v 2 ​ =0 m 1 ​ v 1 ​ =−m 2 ​ v 2 ​ v 1 ​ = m 1 ​ −m 2 ​ v 2 ​ ​ Given, m 1 ​ =10g=( 1000 10 ​ )kg, m 2 ​ =1 kg, v 2 ​ =−5m/s ∴v 1 ​ = 10/1000 +1×5 ​ or v 1 ​ =500m/s.

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    • Posted by Мυѕкαи ? 5 years, 2 months ago

    CBSE > Class 09 > Science
    • 4 answers

    Мυѕкαи ? 5 years ago

    Thanks to you all

    0Thank You

    Dr.Riya Bhanushali 5 years, 2 months ago

    Plant cell has 1 large vacuole whereas animal cell has many small vacuoles Plant cell has cell wall whereas animal cell doesn't Plant cell has perifera nucleus i.e nucleus is not at centre whereas nucleus is at centre in animal cell Examples of plant cell - Meristem atic cells Examples of animal cell - Nerve cell Hope it helps you?

    1Thank You

    Vasudha Kakkat 5 years, 2 months ago

    Plant cell has cell wall but animal cell do not have. Best difference

    1Thank You

    Aryya Banik 5 years, 2 months ago

    The best answer Plant cells are found in plants animal cells are found in animals

    1Thank You

    ANSWER

    • Posted by Rohith Dk 5 years, 2 months ago

    CBSE > Class 09 > Science
    • 0 answers
    ANSWER

    • Posted by Rohith Dk 5 years, 2 months ago

    CBSE > Class 09 > Science
    • 0 answers
    ANSWER

    • Posted by Gokul Settu 5 years, 2 months ago

    CBSE > Class 09 > Science
    • 2 answers

    Anmol Raushan 5 years, 2 months ago

    Initial velocity (u)- 0m/s Final velocity (v) - 5 m/s Time - 1 sec By 2nd equation of motion: s=ut + ½at²(a=5-0/1=5m/s²) s=0x1+½5x(1)²= 0+2.5x1=2.5m Distance is 2.5 m

    1Thank You

    Anubhav Singh 5 years, 2 months ago

    Initial velocity(u) = 0m/s Final velocity(v) = 5m/s Time=1s Acceleration = v-u/t = 5m/s - 0m/s/1s = 5m/s/1s = 5m

    1Thank You

    ANSWER

    • Posted by Pranjal Mirg 5 years, 2 months ago

    CBSE > Class 09 > Science
    • 3 answers

    Aryya Banik 5 years, 2 months ago

    Because chromatography prevents the objects from getting charred .

    1Thank You

    Yogita Ingle 5 years, 2 months ago

    Evaporation: It is used for recovering dissolved solid substances from solutions by evaporating the solvent and the solute is left behind.

    Chromatography: It is an advanced technique of separation in which individual components of a mixture are separated from each other using the property of differential migration (different rates of flow).

    0Thank You

    Rooh Choudhary 5 years, 2 months ago

    Because the substance after evaporation have some impurities but after chromatography you will get pure substance

    3Thank You

    ANSWER

    • Posted by Naman Pandey 5 years, 2 months ago

    CBSE > Class 09 > Science
    • 1 answers

    Rooh Choudhary 5 years, 2 months ago

    Triatomic molecules are molecules composed of three atoms, of either the same or different chemical elements. Examples include H2O, Co2, HCN

    2Thank You

    ANSWER

    • Posted by Balu J 5 years, 2 months ago

    CBSE > Class 09 > Science
    • 1 answers

    Naman Pandey 5 years, 2 months ago

    Muscle cells are excitable; they respond to a stimulus. They are contractile, meaning they can shorten and generate a pulling force. When attached between two movable objects, in other words, bones, contractions of the muscles cause the bones to move.

    2Thank You

    ANSWER

    • Posted by 9-A Vasu Agarwal 5 years, 2 months ago

    CBSE > Class 09 > Science
    • 3 answers

    Abhishek Chaudhary 5 years, 2 months ago

    Mare chote se pyare Bhai question pura send Kar karo

    2Thank You

    Disha Matta 5 years, 2 months ago

    Complete your question

    1Thank You

    Parth Bajpai 5 years, 2 months ago

    Yes

    1Thank You

    ANSWER

    • Posted by Roshine K.S 5 years, 2 months ago

    CBSE > Class 09 > Science
    • 2 answers

    Disha Matta 5 years, 2 months ago

    10 root 2 m

    1Thank You

    Sarita Panda 5 years, 2 months ago

    10√2m

    1Thank You

    ANSWER

    • Posted by Abhishek Mahato 5 years, 2 months ago

    CBSE > Class 09 > Science
    • 1 answers

    Chinni Sathyam 5 years, 2 months ago

    -They cannot be separated into their constituents by physical means -They have fixed composition -They have fixed metling and boiling point -They are homogeneous in nature -They do not show the properties of their constituents -Energy is involved

    2Thank You

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    • Posted by Gopika.J ?? 5 years, 2 months ago

    CBSE > Class 09 > Science
    • 2 answers

    Anmol Raushan 5 years, 2 months ago

    Gravitation

    1Thank You

    Yogita Ingle 5 years, 2 months ago

    A rotation is a circular movement of an object around a center of rotation. The moon revolves around the earth in a regular path. The gravitational attraction between the earth and the natural satellite holds it in its orbit even as the earth revolves around the earth. Rotation of moon around the earth repeats after regular intervals of time hence it is a periodic motion

    1Thank You

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    • Posted by Pari Dalal 5 years, 2 months ago

    CBSE > Class 09 > Science
    • 1 answers

    Yogita Ingle 5 years, 2 months ago

    Filtration is defined as the separation process in which insoluble impurities are separated from the solution. Filtration is done with the help of filter paper. Filtering mud from muddy water is an example of filtration.

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    • Posted by Sahil Yadav 5 years, 2 months ago

    CBSE > Class 09 > Science
    • 3 answers

    Dr.Riya Bhanushali 5 years, 2 months ago

    If the mass will be doubled then the force will be 4 times

    0Thank You

    Yogita Ingle 5 years, 2 months ago

    Newtons' law for Gravitational force  F = G M1 M2 / d²
          M1 and M2 are masses of two bodies and d is the distance between them.

    1) As Force is directly proportional to the mass of each object, the force will be doubled.

    0Thank You

    Garv Dubey 5 years, 2 months ago

    It will be same

    0Thank You

    ANSWER

    • Posted by Shalu Yadav 5 years, 2 months ago

    CBSE > Class 09 > Science
    • 4 answers

    Abhishek Chaudhary 5 years, 2 months ago

    Atomic numbers : The atomic numbers of an element to the number of protons in the nucleus of the atom

    0Thank You

    Yogita Ingle 5 years, 2 months ago

    Atomic number: The atomic number of an element is equal to the number of protons in the nucleus of its atom.

             e.g., Oxygen has 6 protons hence atomic no. = 6.

    1Thank You

    Muskan Singh 5 years, 2 months ago

    Atomic number is the number of protons of an atom

    0Thank You

    Ayush Rawat 5 years, 2 months ago

    Atomic number are the numbers of proton and electron in the substance.

    0Thank You

    ANSWER

    • Posted by Sahil Yadav 5 years, 2 months ago

    CBSE > Class 09 > Science
    • 2 answers

    Sarita Panda 5 years, 2 months ago

    The scattering of a beam of light is known as Tyndall Effect.

    0Thank You

    Trishla Jain 5 years, 2 months ago

    Its tyndall effect ....................If light is passed through a medium and its path can be seen, then the substance is said to show TYNDALL EFFECT

    0Thank You

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    • Posted by Rengavadivelammal .C 5 years, 2 months ago

    CBSE > Class 09 > Science
    • 1 answers

    Yogita Ingle 5 years, 2 months ago

    Mitosis

    Meiosis

    It is a type of cell division in which the daughter cells formed have exactly the same number of chromosomes as the parent cell.

    It is a type of cell division in which  the  number of chromosomes is reduced by half through the separation of homologous chromosomes in a diploid cell

    Two daughter cells are formed at the end of mitosis.

    Four daughter cells are formed at the end of meiosis. 

    The steps of mitosis are Interphase, Prophase, Metaphase, Anaphase, Telophase, and Cytokinesis

    The steps of meiosis are Interphase, Prophase I, Metaphase I, Anaphase I, Telophase I, Prophase II, Metaphase II, Anaphase II, Telophase II

    Crossing over does not occur 

    Crossing over occurs 

    1Thank You

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    • Posted by Rengavadivelammal .C 5 years, 2 months ago

    CBSE > Class 09 > Science
    • 1 answers

    Yogita Ingle 5 years, 2 months ago

    • The nucleus is small, round and membrane bound structure found in cell.
    • The fluid inside the nucleus surrounded by nuclear membrane is called nucleoplasm.
    • It controls the cell’s growth and reproduction because it contains cell's hereditary information.
    • It is covered by dual layer called nuclear membrane.
    • The nuclear membrane contains pores due to which materials can travel both inside the nucleus from its outer surrounding i.e. cytoplasm.
       
    • The nucleus contains some thread like structures called chromatin. It exists during the resting stage of cell.
    • The chromatin contains DNA (Deoxy-ribo nucleic acid), RNA (Ribo Nucleic acid) and proteins.
    • The nucleus contains some rod shaped structures in a cell that contains the hereditary information. They are called chromosome

    1Thank You

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    • Posted by Shikha Maurya 5 years, 2 months ago

    CBSE > Class 09 > Science
    • 1 answers

    Meghna Thapar 5 years, 2 months ago

    Eyepiece Tube holds the eyepieces in place above the objective lens. For safety reasons, you should never use a microscope in direct sunlight. This could hurt your eyes. Look through the eyepiece to see the specimen. ... Remember that you always need to keep both eyes open while looking into the microscope, because this will help you to avoid a painful condition called eyestrain.

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    • Posted by Roshani Pal 5 years, 2 months ago

    CBSE > Class 09 > Science
    • 2 answers

    Rishabh Kudrigi 5 years, 2 months ago

    Atomic mass =mass of one atom of an element Andy Hulu zebu sleep friction

    0Thank You

    Yogita Ingle 5 years, 2 months ago

    Atomic mass refers to the mass of an atom. It depicts how many times an atom of an element is heavier than one-twelth (1/12th) the mass of one atom of carbon-12 of mass of one carbon atom. The relative atomic masses of all elements have been established with reverence to an atom of carbon-12. It is measured in unit called amu (atomic mass unit). 1/12 of the mass of one atom of carbon is termed as relative atomic mass. It doesnot possess a unit.

    Mathematically,

    mass of one atom of an element = atomic mass X (1/12th) of the mass of one atom of carbon. 

    Or

    atomic mass = mass of one atom of an element / (1/12th) of the mass of one atom of carbon.

    0Thank You

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    • Posted by Darshan Gowda . R Darshan Gowda . R 5 years, 2 months ago

    CBSE > Class 09 > Science
    • 2 answers

    Naina Gupta 5 years, 2 months ago

    Sodium hydroxide

    0Thank You

    Trishla Jain 5 years, 2 months ago

    I think your Question is a little bit wrong

    0Thank You

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    • Posted by Rengavadivelammal .C 5 years, 2 months ago

    CBSE > Class 09 > Science
    • 1 answers

    Rohit Gupta 5 years, 2 months ago

    The term cytokinesis refers to the division of a cell in half, while mitosis and meiosis refer to two different forms of nuclear division. Mitosis results in two nuclei that are identical to the original nucleus. Meiosis, on the other hand, results in four nuclei that each has ½ the chromosomes of the original cell.

    1Thank You

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    • Posted by Disha Thakur 5 years, 2 months ago

    CBSE > Class 09 > Science
    • 2 answers

    Dr.Riya Bhanushali 5 years, 2 months ago

    Metalloids are elements having some properties of metals and some properties of nonmetals

    0Thank You

    Yogita Ingle 5 years, 2 months ago

    Metalloids are the elements which are having a combination of some properties of metals along with some properties of nonmetals. Their properties are intermediate between the properties of metals and nonmetals, they are also called semi-metals.

    Example: – Boron, Silicon, Germanium, etc

    2Thank You

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    • Posted by Muthu Dainy 5 years, 2 months ago

    CBSE > Class 09 > Science
    • 2 answers

    Yogita Ingle 5 years, 2 months ago

    60% by volume of alcohol solution means,each 100 ml of solution will have 60 ml ethyl alcohol.
    so,250 ml of solution will have
    =(60/100)x250=150 ml of ethyl alcohol 
    hence in a 250ml solution of 60% by volume of alchohol and water,alcohol should be 150 ml and water should be 100 ml.
     

    2Thank You

    Ananya K 5 years, 2 months ago

    60% by volume of alcohol solution means,each 100 ml of solution will have 60 ml ethyl alcohol. hence in a 250ml solution of 60% by volume of alchohol and water,alcohol should be 150 ml and water should be 100 ml.

    2Thank You

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    • Posted by Ragini Soni 5 years, 2 months ago

    CBSE > Class 09 > Science
    • 3 answers

    Meghna Thapar 5 years, 2 months ago

    An atom is the smallest particle of the element that can exist independently and retain all its chemical properties. A molecule is the smallest particle of an element or a compound capable of independent existence under ordinary conditions. It shows all the properties of the substance. Electrons are the smallest of the three particles that make up atoms. Electrons are found in shells or orbitals that surround the nucleus of an atom. Protons and neutrons are found in the nucleus. They group together in the center of the atom.

    0Thank You

    Yogita Ingle 5 years, 2 months ago

    The smallest particle of matter, which can take part in a chemical reaction is called atom.

    Question 5. Define molecule.
    Answer: The smallest particle of an element or compound which can exist independently is called molecule.

    1Thank You

    Muthu Dainy 5 years, 2 months ago

    Atom is the smallest particle that combine to form molecules. Molecules are the smallest particle that combine to form matter

    4Thank You

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