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    • Posted by Shameema Shaukath 7 years, 2 months ago

    CBSE > Class 09 > Science
    • 1 answers

    Ashish Bhadouria 7 years, 2 months ago

    A segmented wall of phylum annelida, such as earthworm or leech

    1Thank You

    ANSWER

    • Posted by Manjusri Bhattacharya 7 years, 2 months ago

    CBSE > Class 09 > Science
    • 1 answers

    Pratyusha Samantaray 7 years, 2 months ago

    Scattering of light in a colloidal solution is called Tyndall effect. Example scattering of light in canopy of dense forest.

    2Thank You

    ANSWER

    • Posted by Mayank Chauhan 7 years, 2 months ago

    CBSE > Class 09 > Science
    • 2 answers

    Rishita Singh 7 years, 2 months ago

    Because they need medium to travel

    0Thank You

    Pratyusha Samantaray 7 years, 2 months ago

    Sound waves needs material medium like air and water for its propagation . Thus, they are called mechanical waves.

    1Thank You

    ANSWER

    • Posted by Naval, Mittal 7 years, 2 months ago

    CBSE > Class 09 > Science
    • 1 answers

    Ashish Bhadouria 7 years, 2 months ago

    PHYSICAL CHANGE. 1) Chemical composition of substance does not change. 2) most changes are reversible. 3)no new substance formed. 4)Ex- ice -water-gas CHEMICAL CHANGE. 1) chemical composition of substance change. 2) most of changes are Irreversible. 3) new substance formed. 4)Ex- paper - ashes

    1Thank You

    ANSWER

    • Posted by Mayank Chauhan 7 years, 2 months ago

    CBSE > Class 09 > Science
    • 1 answers

    Pratyusha Samantaray 7 years, 2 months ago

    Isobars have same atomic mass but different atomic number. For example atomic number of argon is 18 and atomic number of calcium is 20 but their mass is 40.

    2Thank You

    ANSWER

    • Posted by Mayank Chauhan 7 years, 2 months ago

    CBSE > Class 09 > Science
    • 4 answers

    Ramsharan Kishor 7 years, 2 months ago

    an atom in which same atomic number but different in mass number

    1Thank You

    Luv Bazzar 7 years, 2 months ago

    The elements which have same atomic no. but fifferent mass number are called isotopes.

    1Thank You

    Saroj Bala 7 years, 2 months ago

    Different mass number but I same atomic number

    2Thank You

    Devagya Singh 7 years, 2 months ago

    Isotope have same atomic no. But different atomic mass

    2Thank You

    ANSWER

    • Posted by Priyanshu Raturi 7 years, 2 months ago

    CBSE > Class 09 > Science
    • 1 answers

    Gaurav Seth 7 years, 2 months ago

    The device that converts electrical energy to mechanical energy is an electric motor

    4Thank You

    ANSWER

    • Posted by Saumya Dhandole 7 years, 2 months ago

    CBSE > Class 09 > Science
    • 0 answers
    ANSWER

    • Posted by Harshit Khera 7 years, 2 months ago

    CBSE > Class 09 > Science
    • 2 answers

    Manish Kumar 7 years, 2 months ago

    Immunization only incraese fighting capacity of your immune system against pathogen, it does not kill the pathogen but Vaccination kill the pathogen by blocking their biochemical pathways.

    3Thank You

    Gaurav Seth 7 years, 2 months ago

    Difference Between Vaccination And Immunization

    Vaccination

    Immunization

    The process involves Introducing a weakened / deactivated disease causing microbes into a person

    The process starts after the person is exposed to the vaccine and the body starts building resistance to that disease

    It is usually injected or administered orally

    It is not administered in any way, the body develops the resistance from vaccines

    Imovax Rabies is the trade name for rabies vaccine

    The body builds up immunity through this vaccine for the disease rabies

    Vaccination does not guarantee complete resistance to a disease

    Complete immunity occurs when the person fully recovers from the disease

    Usually, if mutation happens to microbe, it might render the vaccine ineffective (this is the reason why common cold has no vaccine)

    Similarly, variations of a disease impact the body’s ability to generate an immune response

    1Thank You

    ANSWER

    • Posted by Alok Kumar 7 years, 2 months ago

    CBSE > Class 09 > Science
    • 2 answers

    Rishita Singh 7 years, 2 months ago

    Frequency above 20,000 hz

    0Thank You

    Harshit Khera 7 years, 2 months ago

    Having frequency above 20khz

    1Thank You

    ANSWER

    • Posted by Misbah Mir 7 years, 2 months ago

    CBSE > Class 09 > Science
    • 1 answers

    Gaurav Seth 7 years, 2 months ago

    Volume of solute = 25 ml.

    Volume of solvent = 150 ml.

    Volume of solution = volume of solute + volume of solvent
                                     = 25 ml +150 ml.
                                    = 175 ml.

    Volume by Volume percentage =    volume of solute  * 100
                                                           volume of solution

                                                    = 25 *100
                                                          175
     
                                                    = 14.28

    1Thank You

    ANSWER

    • Posted by Ketan Meshram 7 years, 2 months ago

    CBSE > Class 09 > Science
    • 1 answers

    Aniket Mishra 7 years, 2 months ago

    S.no. time temperature 1 0 21.c 2 1 30.c 3 2 41.c 4 3 55.c 5 4 60.c 7 6 70.c 8 7 77.c 9 8 83.c 10 9 91.c 11 10 99.c 12 11 99.c 13 12 100.c 14 13 15 14

    3Thank You

    ANSWER

    • Posted by Aniket Mishra 7 years, 2 months ago

    CBSE > Class 09 > Science
    • 1 answers

    Mehakjot Kaur?? 7 years, 2 months ago

    It shows the number and kinds of atoms in a molecule

    1Thank You

    ANSWER

    • Posted by Sagar Rawat 7 years, 2 months ago

    CBSE > Class 09 > Science
    • 1 answers

    😀 😀 7 years, 2 months ago

    Chloroplasts are the cell organelle which release oxygen

    4Thank You

    ANSWER

    • Posted by Daniya Arshad 7 years, 2 months ago

    CBSE > Class 09 > Science
    • 4 answers

    Raj Dran 7 years, 2 months ago

    This model cannot explain how the negatively charged particles are shielded from the positively charged sphere

    0Thank You

    Gifty Rajesh 7 years, 2 months ago

    *Thomson’s atomic model failed to explain how the positive charge holds on the electrons inside the atom. It also failed to explain an atom’s stability. *The theory did not mention anything about the nucleus of an atom. *It was unable to explain the scattering experiment of Rutherford.

    1Thank You

    Daniya Arshad 7 years, 2 months ago

    K

    0Thank You

    Dhruv Bansal 7 years, 2 months ago

    He does not give an experimental support

    1Thank You

    ANSWER

    • Posted by Dhruv Bansal 7 years, 2 months ago

    CBSE > Class 09 > Science
    • 0 answers
    ANSWER

    • Posted by Ishita Rathore 7 years, 2 months ago

    CBSE > Class 09 > Science
    • 1 answers

    S Boyz 7 years, 2 months ago

    Give

    0Thank You

    ANSWER

    • Posted by Jyoti Sharma 7 years, 2 months ago

    CBSE > Class 09 > Science
    • 1 answers

    Sheetal Yadav 7 years, 2 months ago

    A group of cell that are similar in structure and work together to achieve a particular function

    3Thank You

    ANSWER

    • Posted by Sahil Soni 7 years, 2 months ago

    CBSE > Class 09 > Science
    • 4 answers

    Shreya Chaurasiya 7 years, 2 months ago

    Cell was discovered by robert hooke in 1665......

    1Thank You

    Prarhamesh Dhanaji 7 years, 2 months ago

    1665 by Robert hook

    1Thank You

    Sheetal Yadav 7 years, 2 months ago

    Cell was discovered in 1665

    1Thank You

    Sahil Soni 7 years, 2 months ago

    When was cell was discovered

    2Thank You

    ANSWER

    • Posted by Simran Chaudhary 7 years, 2 months ago

    CBSE > Class 09 > Science
    • 4 answers

    Mehakjot Kaur?? 7 years, 2 months ago

    Iodine 131 is use to treat the goitre and anaemia

    0Thank You

    Anushka Nagar 7 years, 2 months ago

    Isotope of iron is used in anaemia and isotope of iodine is used in goitre

    1Thank You

    Sagar Rawat 7 years, 2 months ago

    Isotope of iodine

    0Thank You

    Sheetal Yadav 7 years, 2 months ago

    Isotope of iodine is used in treatment of goitre

    0Thank You

    ANSWER

    • Posted by Sahil Soni 7 years, 2 months ago

    CBSE > Class 09 > Science
    • 0 answers
    ANSWER

    • Posted by Manish Kumar 7 years, 2 months ago

    CBSE > Class 09 > Science
    • 1 answers

    Yogita Ingle 7 years, 2 months ago

    The technique used in order to separate the components of a chemical mixture by moving the mixture along a stationary material like gelatin. Different components of the mixture are adsorbed by the material at different rates and form isolated bands that can then be analyzed.

    2Thank You

    ANSWER

    • Posted by Vivek Yadav Vivek Yadav 7 years, 2 months ago

    CBSE > Class 09 > Science
    • 1 answers

    Yogita Ingle 7 years, 2 months ago

    Crop rotation : crop rotation is the practice of growing a series of different types of crops in the same area in sequential seasons.
    Advantages of crop rotation:

    • It help in reducing the pests build up.
    • Reduces soil erosion.
    • Helps in control weeds.
    • It prevents diseases.

    1Thank You

    ANSWER

    • Posted by Sanjeev Joshi 7 years, 2 months ago

    CBSE > Class 09 > Science
    • 0 answers
    ANSWER

    • Posted by Prachi Goswami 7 years, 2 months ago

    CBSE > Class 09 > Science
    • 0 answers
    ANSWER

    • Posted by Sanjeev Joshi 7 years, 2 months ago

    CBSE > Class 09 > Science
    • 0 answers
    ANSWER

    • Posted by Sanjeev Joshi 7 years, 2 months ago

    CBSE > Class 09 > Science
    • 0 answers
    ANSWER

    • Posted by Sanjeev Joshi 7 years, 2 months ago

    CBSE > Class 09 > Science
    • 0 answers
    ANSWER

    • Posted by Sanjeev Joshi 7 years, 2 months ago

    CBSE > Class 09 > Science
    • 0 answers
    ANSWER

    • Posted by Prarhamesh Dhanaji 7 years, 2 months ago

    CBSE > Class 09 > Science
    • 1 answers

    Gaurav Seth 7 years, 2 months ago

    Atmosphere is essential for life because of the following reasons:

    i. It acts as a blanket and keeps the average temperature of the earth fairly steady as it prevents the sudden increase in temperature during the day and slows down the escape of heat into outer space during the night.

    ii. It contains all the gases which are essential for sustaining life on the earth.

    iii. Ozone present in the atmosphere prevents UV rays from reaching the earth, which are very harmful to us.

    iv. Winds are generated due to the movement of air present in the atmosphere, and rain and rainfall patterns are decided by these winds.

    v. Water cycle is not possible without atmosphere.

    2Thank You

    ANSWER

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