No products in the cart.

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

Ask Question

    • Posted by Prem Bhai 5 years, 8 months ago

    CBSE > Class 09 > Science
    • 1 answers

    Prakhar Sahu 5 years, 8 months ago

    The Ozone layer is made of O³ which react to CFCs (cloro floror carbon) which comes from ACs and refrigerators and cause depletion of Ozon layer . Ozon protect us from harmful radiation from sun.

    0Thank You

    ANSWER

    • Posted by Kavya Bhatia 5 years, 8 months ago

    CBSE > Class 09 > Science
    • 2 answers

    Anshika Mishra 5 years, 8 months ago

    I00 degree

    0Thank You

    Aditya Sinha 5 years, 8 months ago

    It would be less than 373 k or less than 100 degree celcius as decrease in pressure causes variation in boiling points

    1Thank You

    ANSWER

    • Posted by Sahashrajeet Sarkar 5 years, 8 months ago

    CBSE > Class 09 > Science
    • 1 answers

    Kavya Bhatia 5 years, 8 months ago

    Thomson proposed in jis model that an atom is a large positively charged sphere in which negatively charged particles are embedded. He also said that the positive and negative charge are equal and hence they cancel out each other. Its other name is plum pudding model. This is because it resembled a christmar pudding where the negatively charged particles( currants) are embedded in the positively charged part.

    0Thank You

    ANSWER

    • Posted by Rohith Damien Pereira 5 years, 8 months ago

    CBSE > Class 09 > Science
    • 1 answers

    Yogita Ingle 5 years, 8 months ago

    u=25 m/s                      

    v = 0

    t=5 s

    m =180 kg

    p1  =mu = 180 x 25

                 =4500 kg m/s  

    p2 = mv = 180 x 0 = 0 kgm/s

              p1 - p2 = 0 - 4500

                          = -4500 kgm/s

    Read more on Brainly.in - https://brainly.in/question/680727#readmore

    1Thank You

    ANSWER

    • Posted by ..... Sharma 5 years, 8 months ago

    CBSE > Class 09 > Science
    • 2 answers

    Kavya Bhatia 5 years, 8 months ago

    X_2O_3

    0Thank You

    Yogita Ingle 5 years, 8 months ago

    Compound 'X' has valency 3 and 'O' has valency 2 . L.C.M of 3 & 2 is 6 .
    For X = 3 * 2 = 6
    For O = 2 * 3 = 6
    Therefore {tex} X_{2}O_{3} {/tex} is the formula of oxide of 'X'

    1Thank You

    ANSWER

    • Posted by Basant Sameer 5 years, 8 months ago

    CBSE > Class 09 > Science
    • 0 answers
    ANSWER

    • Posted by Sarita Kumari 5 years, 8 months ago

    CBSE > Class 09 > Science
    • 2 answers

    S A 5 years, 8 months ago

    The movement of solvent molecules through semipermeable membrane of cell from high concentration to low concentration is known as osmosis

    1Thank You

    Sarfraj Ahmad 5 years, 8 months ago

    Osmosis is the process where solvent molecules move through a semipermeable membrane from a dilute solution into a more concentrated solution (which becomes more dilute)

    0Thank You

    ANSWER

    • Posted by Bazzi Bazzi 5 years, 8 months ago

    CBSE > Class 09 > Science
    • 1 answers

    Meghna Thapar 5 years, 7 months ago

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

    The force of friction acts in a direction opposite to the direction in which an object moves. Place a book on the table and gently push it towards right side. It moves through some distance to the right side and then stops on its own. This means that the force of friction is acting on it in the opposite direction (towards left) which is opposing its motion. Similarly, if we push the book towards left side, it will move towards left side but the force of friction acts towards right side which makes it to stop.

    0Thank You

    ANSWER

    • Posted by Khushbu Sharma 5 years, 8 months ago

    CBSE > Class 09 > Science
    • 2 answers

    Yogita Ingle 5 years, 8 months ago

    A mole is about 6.022 * 1023 of anything. So half a mole of water molecules is 3.011 * 1023 molecules of water. 0.5 x 6.022 x 1023 molecules of water.

    0Thank You

    Aaquib Khan 5 years, 8 months ago

    3.011×10 to the power 23

    0Thank You

    ANSWER

    • Posted by Shubham Shirasi 5 years, 8 months ago

    CBSE > Class 09 > Science
    • 2 answers

    ..... Sharma 5 years, 8 months ago

    Atom

    0Thank You

    Mysterious Science World 5 years, 8 months ago

    Atoms

    1Thank You

    ANSWER

    • Posted by Junaid Mobashshir 5 years, 8 months ago

    CBSE > Class 09 > Science
    • 3 answers

    Anjali Anandi 5 years, 8 months ago

    APPLICATIONS OF ISOTOPES -------------------------------------------------- 1. Isotopes are the atoms of same element. 2. They have similar atomic no. 3. They have different mass no. 4. They have same electron and proton no. 5. They have different neutron no. 6. The chemical properties are similar. 7. They have similar position in modern periodic table.

    0Thank You

    Anjali Anandi 5 years, 8 months ago

    Isotopes are the atoms of same element whose atomic no. is similar but mass no. are different.For example-C6 12 and C6 14.

    0Thank You

    Chirag Sharma 5 years, 8 months ago

    Having same protons but different amount of neutrons Example Isotopes of hydrogen 1)protium 2)deutrium 3)tritium

    0Thank You

    ANSWER

    • Posted by Nitin Goyal 5 years, 8 months ago

    CBSE > Class 09 > Science
    • 1 answers

    Chirag Sharma 5 years, 8 months ago

    Bull pulling cart

    0Thank You

    ANSWER

    • Posted by Palak Tiwari 5 years, 8 months ago

    CBSE > Class 09 > Science
    • 1 answers

    Mysterious Science World 5 years, 8 months ago

    By process of diffusion

    0Thank You

    ANSWER

    • Posted by sahi****@***** 5 years, 8 months ago

    CBSE > Class 09 > Science
    • 1 answers

    Mysterious Science World 5 years, 8 months ago

    Its kinetic energy increase ,b)machenical energy = EK+EP if ep=0 Me=mgh

    0Thank You

    ANSWER

    • Posted by Israr Ahmed 5 years, 8 months ago

    CBSE > Class 09 > Science
    • 1 answers

    Aram Hasan 5 years, 8 months ago

    By build checkdams the water stay at one place and the water seep into ground

    0Thank You

    ANSWER

    • Posted by Shreyas Pareek 5 years, 8 months ago

    CBSE > Class 09 > Science
    • 5 answers

    Shreyas Pareek 5 years, 7 months ago

    The answer is leuwenhoek , not robert hooke because robert hooke discovered first non living cell and leuwenhoek discovered first *living* cell.

    1Thank You

    Rajalakshmi Venkatesan 5 years, 8 months ago

    Robert hooke

    1Thank You

    Kamini Pathania 5 years, 8 months ago

    Robert Hooke

    1Thank You

    Shreyas Pareek 5 years, 8 months ago

    Leeuwenhoek in 1674

    1Thank You

    Shreyas Pareek 5 years, 8 months ago

    Leeuwenhoek in 1974

    3Thank You

    ANSWER

    • Posted by sahi****@***** 5 years, 8 months ago

    CBSE > Class 09 > Science
    • 2 answers

    Shivansh Mishra 5 years, 8 months ago

    The total potential energy of object at height of 1m meter is also equal to its final K. E. So u can simply find..... PE= 1*9.8*2 =19.6joule KE (final) =19.6joule...?

    1Thank You

    Namrata Jindal 5 years, 8 months ago

    v = √(u^2 + 2as) = √(0+2*9.8*1) =√19.6 Kinetic energy=1/2 mv^2 = 1/2 *2*v^2 = v^2 = (√19.6)^2 = 19.6 J

    0Thank You

    ANSWER

    • Posted by Aalok Ranjan 5 years, 8 months ago

    CBSE > Class 09 > Science
    • 0 answers
    ANSWER

    • Posted by Athar Kamal 5 years, 8 months ago

    CBSE > Class 09 > Science
    • 5 answers

    Anjali Anandi 5 years, 8 months ago

    32

    0Thank You

    Chirag Sharma 5 years, 8 months ago

    32

    0Thank You

    Kamini Pathania 5 years, 8 months ago

    8

    0Thank You

    Shreyas Pareek 5 years, 8 months ago

    32

    1Thank You

    Nishant Kumar 5 years, 8 months ago

    8

    0Thank You

    ANSWER

    • Posted by ..... Sharma 5 years, 8 months ago

    CBSE > Class 09 > Science
    • 1 answers

    Yogita Ingle 5 years, 8 months ago

    The biological process through which sexual characteristics of an individual develops making it a male individual or female individual is called *** determination

    1Thank You

    ANSWER

    • Posted by ..... Sharma 5 years, 8 months ago

    CBSE > Class 09 > Science
    • 1 answers

    Yogita Ingle 5 years, 8 months ago

    Molecular mass: Molecular mass of a substance is defined as the sum o the atomic masses of all the atoms present in a molecule of a substance. Therefore the relative mass of a molecule is expressed as atomic mass units (amu).

    Empirical formula: The empirical formula is the simplest formula for a compound which is defined as the ratio of subscripts of the smallest possible whole number of the elements present in the formula. It is also known as the simplest formula. An empirical formula for a compound is the formula of a substance written with the smallest integer subscript.

    1Thank You

    ANSWER

    • Posted by Pankaj Mourya 5 years, 8 months ago

    CBSE > Class 09 > Science
    • 1 answers

    Yogesh Tripathi 5 years, 8 months ago

    As You know cell is the basic fundamental , functional unit of life. Human body is made up of cells and each cell have definite work. Same kind of cell with same structure and function lead to the formation of tissue and two or more tissue lead the formation of organ and organ lead to formation of body. Thus, cell is the functional unit of life

    0Thank You

    ANSWER

    • Posted by Renuka Paramasivam 5 years, 8 months ago

    CBSE > Class 09 > Science
    • 2 answers

    Aalok Ranjan 5 years, 8 months ago

    Cardiac muscle cells are found only in the heart.and are specialized to pump powerfully and efficiently throught out our entire life time. four characteristics define cardiac muscle tissue cell. they are involvery and intrinsically controlled. straited branched. l hope this help you

    0Thank You

    Yogita Ingle 5 years, 8 months ago

    Heart, which pumps blood throughout the body, is made up of cardiac muscles. Three features of cardiac muscle are:

    (i) Cardiac muscles are involuntary. They cannot be controlled by will.

    (ii) Cardiac muscle cells are cylindrical, branched and uninucleate.

    (iii) Cardiac muscles show rhythmic contraction and relaxation throughout the life.

    1Thank You

    ANSWER

    • Posted by deva****@***** 5 years, 8 months ago

    CBSE > Class 09 > Science
    • 1 answers

    Yogita Ingle 5 years, 8 months ago

    Kharif Crop Rabi Crop
    Sown when the rainy season begins, i.e. between April and May. Sown when the winter season ends, i.e. between September and October.
    Also known as monsoon crops. Also known as winter crops.
    Affected by rainfall pattern. Not affected by rainfall pattern.
    Requires hot weather and a large amount of water to grow. Requires warm climate for seed germination and cold climate to grow.
    The harvesting month is between September-October. The harvesting month is between March-April.
    Maize, rice, cotton, groundnut are Kharif crops. Peas, wheat, gram and barley are rabi crops.

    0Thank You

    ANSWER

    • Posted by Kavya K H 5 years, 8 months ago

    CBSE > Class 09 > Science
    • 1 answers

    Vivek Kumar 5 years, 8 months ago

    Because the proton are present inside the nucleus while electrons are not.similiarly it is difficult to peeled of neutron as the present inside the nucleus.

    1Thank You

    ANSWER

    • Posted by Prerana A Singh 5 years, 8 months ago

    CBSE > Class 09 > Science
    • 1 answers

    Vivek Kumar 5 years, 8 months ago

    Ex during malaria there is reccurent fever and chiils(cold)

    0Thank You

    ANSWER

    • Posted by Savitri Negi 5 years, 8 months ago

    CBSE > Class 09 > Science
    • 1 answers

    Yogita Ingle 5 years, 8 months ago

    All matter is made of very tiny particles called atoms. Atoms are indivisible particles, which cannot be created or destroyed in a chemical reaction. Atoms of a given element are identical in mass and chemical properties. Atoms of different elements have different masses and chemical properties.

    0Thank You

    ANSWER

    • Posted by Amrik Ram 5 years, 8 months ago

    CBSE > Class 09 > Science
    • 0 answers
    ANSWER

    • Posted by Nitish Singh Singh 5 years, 8 months ago

    CBSE > Class 09 > Science
    • 1 answers

    Yogita Ingle 5 years, 8 months ago

    To help them find their prey in the dark, most bat species have developed a remarkable navigation system called echolocation. Bats use echo in this process .A bat emits a ultrasound waves and listens carefully to the echoes that are returned. The ultrasound pulses are not echoed if way is clear. The bat's brain processes the returning information the same way we processed our shouting sound using a stopwatch and calculator. By determining how long it takes a noise to return, the bat's brain figures out how far away an object is. They compare the volume of echoes in their right and left ears, and turn away from the louder echo, since that obstacle would presumably be nearer this method allowed bats to avoid obstacles using just the first millisecond of the echo as a signal.

    0Thank You

    ANSWER

    • Posted by Dhruv Kohli 5 years, 8 months ago

    CBSE > Class 09 > Science
    • 3 answers

    Yogita Ingle 5 years, 8 months ago

    The British physicist Sir James Chadwick discovered neutrons in the year 1932. He was awarded the Nobel Prize in Physics in the year 1935 for this discovery.

    0Thank You

    Ashutosh Kumar Tiwari 5 years, 8 months ago

    James Chadwick

    1Thank You

    Dhruv Kohli 5 years, 8 months ago

    J.CHADWICK

    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