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    • Posted by Neel Shetty 3 years, 6 months ago

    CBSE > Class 09 > Science
    • 1 answers

    Somansh Sarvesh 3 years, 6 months ago

    Endorphins

    0Thank You

    ANSWER

    • Posted by Mansi Kumari 3 years, 6 months ago

    CBSE > Class 09 > Science
    • 1 answers

    Harsh Raj 3 years, 6 months ago

    When 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.

    2Thank You

    ANSWER

    • Posted by Aman Sharma 3 years, 6 months ago

    CBSE > Class 09 > Science
    • 1 answers

    Pinak Panigrahi 3 years, 6 months ago

    6.022× 10^ 20

    0Thank You

    ANSWER

    • Posted by Khushal Goyal 3 years, 6 months ago

    CBSE > Class 09 > Science
    • 5 answers

    Puneet Kour 3 years, 6 months ago

    Do hard work

    0Thank You

    Reena Baghel 3 years, 6 months ago

    Do hard work

    2Thank You

    Hardick Choudhary 3 years, 6 months ago

    Pawri hard

    0Thank You

    Ritika Arya? 3 years, 6 months ago

    Do important questions

    2Thank You

    Anushka Agarwal 3 years, 6 months ago

    Do one thing.....do the cbse important questions in the cbseguide app from every chapter coming in your syllabus.

    3Thank You

    ANSWER

    • Posted by Roshan Gupta 3 years, 6 months ago

    CBSE > Class 09 > Science
    • 4 answers

    Daksh Chauhan 3 years, 6 months ago

    Speed is with only direction but velocity is with direction and magnitude

    0Thank You

    Akshat Sharma 3 years, 6 months ago

    It's vector quantity (velocity) and it's scalar quantity (speed)

    0Thank You

    Udit Narayan Tiwary 3 years, 6 months ago

    The distance travelled by an object per unit time is called speed. The displacement of the object per unit time is called velocity.

    2Thank You

    Khushal Goyal 3 years, 6 months ago

    Speed is speed and velocity is velocity simple

    2Thank You

    ANSWER

    • Posted by Likhita Gvk 3 years, 6 months ago

    CBSE > Class 09 > Science
    • 2 answers

    Anushka Agarwal 3 years, 6 months ago

    It is because chlorine has a pair of isotope Cl-35 and Cl-37 Hence the average is taken out depending upon the existence percentage of the isotopes in nature.

    2Thank You

    Krisha Shah 3 years, 6 months ago

    It is its average atomic mass of all forms of chlorine.

    1Thank You

    ANSWER

    • Posted by Karthik Aravind 3 years, 7 months ago

    CBSE > Class 09 > Science
    • 4 answers

    Himanshi Chauhan 3 years, 6 months ago

    They have their own genetic material which is called DNA

    1Thank You

    Daksh Chauhan 3 years, 6 months ago

    They both have their own genetic materials

    0Thank You

    Krisha Shah 3 years, 6 months ago

    Doubly membrane bounded as well as has their own DNA

    0Thank You

    Rhea Devaraj 3 years, 7 months ago

    1.)Both have double Membrane 2.)Both have their own DNA & Ribosomes

    2Thank You

    ANSWER

    • Posted by Karthik Aravind 3 years, 7 months ago

    CBSE > Class 09 > Science
    • 2 answers

    Anushka Agarwal 3 years, 6 months ago

    When the plant cell absorbs a lot of water, then it doesn't burst due to the rigidity of the cell wall. Due to the swelling up of cell(extreme), it produces a force on the cell wall but the rigid cell wall pushes it back with an equivalent force.

    0Thank You

    Krisha Shah 3 years, 6 months ago

    It helps to maintain the turgidity of the cell and gives the cell a proper definite shape.

    0Thank You

    ANSWER

    • Posted by Karthik Aravind 3 years, 7 months ago

    CBSE > Class 09 > Science
    • 4 answers

    Mansi Yadav 3 years, 6 months ago

    F= ma

    0Thank You

    Aditya Thakur 3 years, 6 months ago

    F=ma

    1Thank You

    Krisha Shah 3 years, 6 months ago

    Force F=ma

    1Thank You

    Hariom Sirota 3 years, 6 months ago

    F-m.a

    1Thank You

    ANSWER

    • Posted by Karthik Aravind 3 years, 7 months ago

    CBSE > Class 09 > Science
    • 1 answers

    Krisha Shah 3 years, 6 months ago

    W=mg W=5×9.8 W=59N/ kg m per second

    0Thank You

    ANSWER

    • Posted by Karthik Aravind 3 years, 7 months ago

    CBSE > Class 09 > Science
    • 1 answers

    Reena Baghel 3 years, 6 months ago

    Negative work is performed if the displacement is opposite to the direction of the force applied Example :- work was done the gravity on a rocket going perpengicular upwards

    3Thank You

    ANSWER

    • Posted by Karthik Aravind 3 years, 7 months ago

    CBSE > Class 09 > Science
    • 0 answers
    ANSWER

    • Posted by Bharti Rani 3 years, 7 months ago

    CBSE > Class 09 > Science
    • 3 answers

    Ayush Sharma 3 years, 6 months ago

    The valency can be calcualted by electronic configuration- 1s²,2s²,2p⁶, 3s²,3p⁶,4s²,3d¹⁰,,..... For ex ample in the case of oxygen it has atomic no.-8, So from the above formula(electronic configuration) Oxygen-8(atomic no.) 1s²,2s²,2p⁴ 2,2+4=2,6 Thus ,no. Of eletrons in the last shell is called valency so, 6 is valency

    1Thank You

    Krisha Shah 3 years, 6 months ago

    The maximum no. Of electrons an element can either gain, loose or share as per its energy is called valence. Molecular mass is simple. It is the mass(atomic mass) of all the molecules of an element .

    1Thank You

    Naman Singh 3 years, 7 months ago

    Given the valence of two elements, find the least common multiple of the absolute value of the valence. Then divide the least common multiple by the absolute value of the valence to find the number of atoms in the molecule. (2) The oxygen element usually shows -2 valence.29-Jan-2020

    2Thank You

    ANSWER

    • Posted by Vansh Jangra 3 years, 7 months ago

    CBSE > Class 09 > Science
    • 1 answers

    Hariom Sirota 3 years, 6 months ago

    Velocity will be 25 meter per second

    0Thank You

    ANSWER

    • Posted by Arnav Yadav 3 years, 7 months ago

    CBSE > Class 09 > Science
    • 1 answers

    Krishna Pal Charan 3 years, 7 months ago

    I don't know

    0Thank You

    ANSWER

    • Posted by Anushka Chaudhary 3 years, 7 months ago

    CBSE > Class 09 > Science
    • 3 answers

    Himanshi Chauhan 3 years, 6 months ago

    F=ma and W=mg

    1Thank You

    Eshaan S 3 years, 7 months ago

    I hope this helps you

    1Thank You

    Eshaan S 3 years, 7 months ago

    Force is any interaction that alters the motion of an object. It is a 'push' or 'pull' action upon an object, resulting from the object's interaction with another object. Weight is the force of gravity, which is the pull of the Earth on an object. The direction of the force of gravity is downwards towards the centre of the Earth. As mentioned earlier when two objects interact they exert equal and opposite forces.

    4Thank You

    ANSWER

    • Posted by Anushka Chaudhary 3 years, 7 months ago

    CBSE > Class 09 > Science
    • 1 answers

    Pravin Kumar 3 years, 7 months ago

    Mass :- It is the quantity of matters in our body. It is denoted by m. It didn't vary from place to place. Momentum:- It is the product of mass and velocity.... P=m*a . . PlZz Like

    3Thank You

    ANSWER

    • Posted by Deepika Sharma 3 years, 7 months ago

    CBSE > Class 09 > Science
    • 5 answers

    Deepika Sharma 3 years, 6 months ago

    Questions is right

    0Thank You

    Taman Bhatnagar 3 years, 7 months ago

    I don't know

    0Thank You

    Moksh Yadav 3 years, 7 months ago

    Side of square field = 20m Perimeter =20*4=80m Time=80sec Means she complete 1 lap in 80 second, therefore 2 laps in 160 sec then half in 40 seconds... So the displacement is the diagonal of square = root side Average velocity is eaual to total time taken upon total distance travelled = 200/200= 1m/s

    1Thank You

    Ranjeet Kumar Pandit?? 3 years, 7 months ago

    Yes please type with a correct unit and in fair manner

    1Thank You

    Vivek Roy 3 years, 7 months ago

    Question ❓ is wrong please type carefully on units

    4Thank You

    ANSWER

    • Posted by 9B-19 Meet Vaghela Jnv Rajkot 3 years, 7 months ago

    CBSE > Class 09 > Science
    • 5 answers

    Marvel 007 3 years, 7 months ago

    Actually your description is not convinent for exam point of view

    1Thank You

    Vishal Prajapat 3 years, 7 months ago

    What is your name where are you live I live in Chaksu I am khushi

    2Thank You

    Marvel 007 3 years, 7 months ago

    RBC are those cells which helps to transport the nutrients, oxygen and other important minerals through blood. Whereas WBC protects the body from foreign substances which must be killed like bacteria, pathogens, etc.

    2Thank You

    Vishal Prajapat 3 years, 7 months ago

    Isme thanks ki kya bat h mujhe Aya to Mene bra diya

    2Thank You

    Vishal Prajapat 3 years, 7 months ago

    RBC is the nerves which has hemoglobin but WBC is not have hemoglobin

    3Thank You

    ANSWER

    • Posted by Varsha Sharma 3 years, 6 months ago

    CBSE > Class 09 > Science
    • 3 answers

    Varsha Sharma 3 years, 6 months ago

    Thanks

    1Thank You

    Sania . 3 years, 7 months ago

    The process in which a liquid change into gaseous state by absorbing heat at constant temperature.

    2Thank You

    Purva Ghule 3 years, 6 months ago

    Vapourization is a process in which the water boils till its boiling point and then after it gets evaporating in which the vapours are formed. This process is called as vapourization

    3Thank You

    ANSWER

    • Posted by Santhwana Johnson 3 years, 7 months ago

    CBSE > Class 09 > Science
    • 1 answers

    Vivek Roy 3 years, 7 months ago

    value ofAcceleration due to gravitywill 9.8m/s"2

    0Thank You

    ANSWER

    • Posted by Yuvraj Singh 3 years, 7 months ago

    CBSE > Class 09 > Science
    • 2 answers

    Krisha Shah 3 years, 6 months ago

    Multiple agents are responsible for a force like mass and acceleration.

    0Thank You

    Deepika Sharma 3 years, 7 months ago

    No agent can exert a force on an object without being in contact with the object.

    0Thank You

    ANSWER

    • Posted by Jagannath Kashyap 3 years, 7 months ago

    CBSE > Class 09 > Science
    • 3 answers

    Himanshi Chauhan 3 years, 6 months ago

    Squamous tissue

    0Thank You

    Bharti Yadav 3 years, 7 months ago

    Simple squamous epithelial tissue

    0Thank You

    Athokpam Abhijeet 3 years, 7 months ago

    Simple Squamous

    0Thank You

    ANSWER

    • Posted by Prathiksha Shetty 3 years, 7 months ago

    CBSE > Class 09 > Science
    • 1 answers

    Sania . 3 years, 7 months ago

    Sublimation is the transition of a substance directly from the solid to the gas state, without passing through the liquid state for example:- dry ice

    2Thank You

    ANSWER

    • Posted by Anshu Kumari 3 years, 7 months ago

    CBSE > Class 09 > Science
    • 1 answers

    Sania . 3 years, 7 months ago

    Not true, because if the initial and final position of the object is the same displacement can become zero.This happens when a body is moving in a circular path.

    2Thank You

    ANSWER

    • Posted by Aprilso Mitti 3 years, 7 months ago

    CBSE > Class 09 > Science
    • 1 answers

    Aprilso Mitti 3 years, 7 months ago

    A) fossil fuel combustion b) respiration c) photosynthesis d) all of these

    2Thank You

    ANSWER

    • Posted by Raj Barchhav 3 years, 7 months ago

    CBSE > Class 09 > Science
    • 4 answers

    Abhinit Jha 3 years, 7 months ago

    When a stationary body move from one place to another by applying force is called motion

    1Thank You

    Ranjeet Kumar Pandit?? 3 years, 7 months ago

    When a stationary body move from one place to another by applying force then we can say that the body in motion

    1Thank You

    Pranav Saraff 3 years, 7 months ago

    Movement of any object from one position to another position with respect to the observer is called as Motion

    1Thank You

    Ridhima Ridhima 3 years, 7 months ago

    What is the commercial unit of energy and state its equivalent value in joules

    2Thank You

    ANSWER

    • Posted by Divya Kumari 3 years, 7 months ago

    CBSE > Class 09 > Science
    • 1 answers

    Sivasudan Tanot 3 years, 7 months ago

    Separation of Mixtures Not everyone is out searching for gold (and not many of those searchers is going to get much gold, either). In a chemical reaction, it is important to isolate the component(s) of interest from all the other materials so they can be further characterized. Studies of biochemical systems, environmental analysis, pharmaceutical research – these and many other areas of research require reliable separation methods. Here are a number of common separation techniques: Chromatography Chromatography is the separation of a mixture by passing it in solution or suspension or as a vapor (as in gas chromatography) through a medium in which the components move at different rates. Thin-layer chromatography is a special type of chromatography used for separating and identifying mixtures that are or can be colored, especially pigments. Distillation Distillation is an effective method to separate mixtures comprised of two or more pure liquids. Distillation is a purification process where the components of a liquid mixture are vaporized and then condensed and isolated. In simple distillation, a mixture is heated and the most volatile component vaporizes at the lowest temperature. The vapor passes through a cooled tube (a condenser), where it condenses back into its liquid state. The condensate that is collected is called distillate.  Figure 2.11 Distillation apparatus. In the Figure above , we see several important pieces of equipment. There is a heat source, a test tube with a one-hole stopper attached to a glass elbow and rubber tubing. The rubber tubing is placed into a collection tube which is submerged in cold water. There are other more complicated assemblies for distillation that can also be used, especially to separate mixtures, which are comprised of pure liquids with boiling points that are close to one another. Evaporation Evaporation is a technique used to separate out homogenous mixtures where there is one or more dissolved solids. This method drives off the liquid components from the solid components. The process typically involves heating the mixture until no more liquid remains, Prior to using this method, the mixture should only contain one liquid component, unless it is not important to isolate the liquid components. This is because all liquid components will evaporate over time. This method is suitable to separate a soluble solid from a liquid. In many parts of the world, table salt is obtained from the evaporation of sea water. The heat for the process comes from the sun.  Figure 2.12 Once the sea water in these evaporation ponds has evaporated, the salt can be harvested. Filtration Filtration is a separation method used to separate out pure substances in mixtures comprised of particles some of which are large enough in size to be captured with a porous material. Particle size can vary considerably, given the type of mixture. For instance, stream water is a mixture that contains naturally occurring biological organisms like bacteria, viruses, and protozoans. Some water filters can filter out bacteria, the length of which is on the order of 1 micron. Other mixtures, like soil, have relatively large particle sizes, which can be filtered through something like a coffee filter.  Figure 2.13 Filtration.

    2Thank You

    ANSWER

    • Posted by M.S.Mukesh Kumar 3 years, 7 months ago

    CBSE > Class 09 > Science
    • 5 answers

    Pranav Saraff 3 years, 6 months ago

    A substance that has a fixed chemical composition throughout is called a pure substance

    1Thank You

    Kaushal Thakur 3 years, 7 months ago

    Substance which are made up of same type of particles that is called pure substance

    1Thank You

    Rishi Raj 3 years, 7 months ago

    A pure substance is one which is made up of one kind of particle (Atoms and molecules)

    2Thank You

    Anand Yadav 3 years, 7 months ago

    A pure substance is one which is made up of one kind of particle (Atoms and molecules)

    1Thank You

    Nitish Yadav 3 years, 7 months ago

    Substances which are made up of same kind of particles are known as pure substances

    2Thank You

    ANSWER

    • Posted by Kartik Kumar 3 years, 7 months ago

    CBSE > Class 09 > Science
    • 4 answers

    Ankit Yadav 3 years, 7 months ago

    Do it

    1Thank You

    Marvel 007 3 years, 7 months ago

    Just have confidence and then do it.??

    1Thank You

    Vishal Prajapat 3 years, 7 months ago

    Don't worry did not take any tention in your mind and study at a fresh mind ok and make own notes

    1Thank You

    Samaira Mehta 3 years, 7 months ago

    Stay calm ? and prepare for it

    6Thank You

    ANSWER

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