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    • Posted by Rahul Kumar 7 years, 2 months ago

    CBSE > Class 09 > Science
    • 2 answers

    Harsh Bisht 7 years, 2 months ago

    Diseases can be prevented by the following :- 1- Don't drink contaminated (dirty ) water ,always drink ARO water . 2- Don't use any used injections in hospital to prevent AIDs like disease . 3- Get a proper vaccine from birth . Hope this will help you

    1Thank You

    Aditya Sony 5 years, 11 months ago

    Don't eat junk food

    0Thank You

    ANSWER

    • Posted by Aman Singh 7 years, 2 months ago

    CBSE > Class 09 > Science
    • 2 answers

    Manish Kumar 7 years, 2 months ago

    E. P=mgh Where, E. P=potential energy m=mass of the object g=accelaration due to gravity h=height of the object

    0Thank You

    Gaurav Seth 7 years, 2 months ago

    The mass formula is given as

    Where,

    ρ = density and

    v = the volume

    The weight mass formula is given as

    m = w / g

    Where,

    w = weight,

    m = mass,

    g = gravity

    The mass formula is also given as

    m = F / a

    If acceleration itself is the gravity, then

    M = F / g

    Where,

    F = force

    G = gravity

    The well known Einstein’s mass-energy relation that provides mass energy formula as

    m = E / c2

    Where,

    E = energy,

    m = mass,

    c = speed of light

    The kinetic energy mass formula is given as

    K.E = ½ mv2

    Where,

    m = mass,

    v = velocity.

    4Thank You

    ANSWER

    • Posted by Vansh Rastogi 7 years, 2 months ago

    CBSE > Class 09 > Science
    • 2 answers

    Manish Kumar 7 years, 2 months ago

    Private body part/main body part

    0Thank You

    Prakhar Gupta 7 years, 2 months ago

    Kuch nahi

    1Thank You

    ANSWER

    • Posted by Vansh Rastogi 7 years, 2 months ago

    CBSE > Class 09 > Science
    • 0 answers
    ANSWER

    • Posted by Nawab Kaif 7 years, 2 months ago

    CBSE > Class 09 > Science
    • 1 answers

    Manish Kumar 7 years, 2 months ago

    A pure substance which is made up of only one kind of molecules is called a compound.

    0Thank You

    ANSWER

    • Posted by Nidhishree Deshpande 7 years, 2 months ago

    CBSE > Class 09 > Science
    • 1 answers

    Gaurav Seth 7 years, 2 months ago

    Positive work is said to be done when the force acting on a body produces a displacement in the direction of the force.

    Negative work is said to be done when the force acting on a body produces a displacement opposite to the direction of the force.

    2Thank You

    ANSWER

    • Posted by Ved Patel 7 years, 2 months ago

    CBSE > Class 09 > Science
    • 1 answers

    Ankit Ambasta 7 years, 2 months ago

    0

    0Thank You

    ANSWER

    • Posted by Khushi Makwana 7 years, 2 months ago

    CBSE > Class 09 > Science
    • 3 answers

    Manish Kumar 7 years, 2 months ago

    It is done by WBC.

    1Thank You

    Harsh Bisht 7 years, 2 months ago

    Clots means when a person gets a cut on any part of his/her body then after some time the blood will stop and a thin layer will appears this layer is called clots and this process is called CLOTTING.... I HOPE THIS WILL HELP YOU

    2Thank You

    Aditya Raghav 7 years, 2 months ago

    A thick mass of coagulated liquid eg. Blood.

    0Thank You

    ANSWER

    • Posted by Arnav Gandhi 7 years, 2 months ago

    CBSE > Class 09 > Science
    • 1 answers

    Aman Raj 7 years, 2 months ago

    Because as you go deep in the river the pressure increases so the maximum pressure Aloted by water is on the bottom of the dam.. So to prevent it from being destroyed the foundations are build wide.. ✅

    0Thank You

    ANSWER

    • Posted by Keshav Kumar 7 years, 2 months ago

    CBSE > Class 09 > Science
    • 1 answers

    Keshav Kumar 7 years, 2 months ago

    Wavelength = 20 ÷4=5 frequency =30×4=120hz speed = 120×5÷100 =6

    0Thank You

    ANSWER

    • Posted by Kushagra Dixit 7 years, 2 months ago

    CBSE > Class 09 > Science
    • 0 answers
    ANSWER

    • Posted by Chirag Ram 7 years, 2 months ago

    CBSE > Class 09 > Science
    • 1 answers

    Gaurav Seth 7 years, 2 months ago

    <font face="Times New Roman, serif"><font style="box-sizing: inherit; outline: none; max-width: 100%; overflow: hidden;"><font size="3"><font style="box-sizing: inherit; outline: none; max-width: 100%; overflow: hidden;">Annelidans are the organisms belonging to Phylum Annelida under the category of invertebrates which do not possess vertebral column. These are the organsims which possess characteristics belonging to Phylum Annelida.</font></font></font></font>

    <font face="Times New Roman, serif"><font style="box-sizing: inherit; outline: none; max-width: 100%; overflow: hidden;"><font size="3"><font style="box-sizing: inherit; outline: none; max-width: 100%; overflow: hidden;">*Annelidans are aquatic or terrestrial, free living or parasitic in nature.</font></font></font></font>

    <font face="Times New Roman, serif"><font style="box-sizing: inherit; outline: none; max-width: 100%; overflow: hidden;"><font size="3"><font style="box-sizing: inherit; outline: none; max-width: 100%; overflow: hidden;">*Annelidans are bilaterally symmetrical, triploblastic, schizocoelomates with segmented body.</font></font></font></font>

    <font face="Times New Roman, serif"><font style="box-sizing: inherit; outline: none; max-width: 100%; overflow: hidden;"><font size="3"><font style="box-sizing: inherit; outline: none; max-width: 100%; overflow: hidden;">*They exhibit organ-system level of organization.</font></font></font></font>

    <font face="Times New Roman, serif"><font style="box-sizing: inherit; outline: none; max-width: 100%; overflow: hidden;"><font size="3"><font style="box-sizing: inherit; outline: none; max-width: 100%; overflow: hidden;">*Locomotion is by longitudinal muscles, circular muscles and setae.</font></font></font></font>

    <font face="Times New Roman, serif"><font style="box-sizing: inherit; outline: none; max-width: 100%; overflow: hidden;"><font size="3"><font style="box-sizing: inherit; outline: none; max-width: 100%; overflow: hidden;">*Closed type of circulatory system is seen.</font></font></font></font>

    <font face="Times New Roman, serif"><font style="box-sizing: inherit; outline: none; max-width: 100%; overflow: hidden;"><font size="3"><font style="box-sizing: inherit; outline: none; max-width: 100%; overflow: hidden;">*Nephridia help in osmoregulation and excretion.</font></font></font></font>

    <font face="Times New Roman, serif"><font style="box-sizing: inherit; outline: none; max-width: 100%; overflow: hidden;"><font size="3"><font style="box-sizing: inherit; outline: none; max-width: 100%; overflow: hidden;">*Nervous system comprises of nerve ganglia connected to nervecords.</font></font></font></font>

    <font face="Times New Roman, serif"><font style="box-sizing: inherit; outline: none; max-width: 100%; overflow: hidden;"><font size="3"><font style="box-sizing: inherit; outline: none; max-width: 100%; overflow: hidden;">*Annelids are both dioeciousand moneciousexhibiting sexual reproduction.</font></font></font></font>

    <font face="Times New Roman, serif"><font style="box-sizing: inherit; outline: none; max-width: 100%; overflow: hidden;"><font size="3"><font style="box-sizing: inherit; outline: none; max-width: 100%; overflow: hidden;">*Annelida gets its name from the Latin word “anellus,” which means "little ring". *Annelids are characterised by the presence of a circulatory system.e.g. Earthworm</font></font></font></font>

    2Thank You

    ANSWER

    • Posted by Shashank Kumar Yadav 7 years, 2 months ago

    CBSE > Class 09 > Science
    • 1 answers

    Aditya Raghav 7 years, 2 months ago

    Syndrome is a collection of symptoms,or problems in the body. Because the immune system is damaged, and cannot flight off disease people with AIDS get a collection of syndrome which is referred to as the acquired immunodeficiency syndrome.

    3Thank You

    ANSWER

    • Posted by Anil Ramtekkar 7 years, 2 months ago

    CBSE > Class 09 > Science
    • 2 answers

    Saijal Singh 7 years, 2 months ago

    And the maximum chaces are 3

    0Thank You

    Saijal Singh 7 years, 2 months ago

    8 (if all are long)?

    0Thank You

    ANSWER

    • Posted by Khushi Boora 7 years, 2 months ago

    CBSE > Class 09 > Science
    • 3 answers

    Ankit Ambasta 7 years, 2 months ago

    Deepu Boora you are wrong carbon dioxide is lighter then oxygen and nitrogen.

    0Thank You

    Khushi Boora 7 years, 2 months ago

    Hi Ankit you are wrong carbon dioxide is heavier than nitrogen and oxygen

    0Thank You

    Ankit Ambasta 7 years, 2 months ago

    Gasses also experiences gravitational force. But some gasses are lighter then other gasses like carbon dioxide That are on the top just above nitrogen and oxygen.

    2Thank You

    ANSWER

    • Posted by A Lekshmi 7 years, 2 months ago

    CBSE > Class 09 > Science
    • 0 answers
    ANSWER

    • Posted by Tajammul Qazi 7 years, 2 months ago

    CBSE > Class 09 > Science
    • 2 answers

    Yogita Ingle 7 years, 2 months ago

    Mole is the measurement in chemistry. It is used to express the amount of a chemical substance.
    One mole is defined as the amount of substance of a system which contains as many entities like, atoms, molecules and ions as there are atoms in 12 grams of carbon - 12".
    Avogadro number:
    The number of the particles present in one mole of any substance = 6.022x1023. This is called avogadro’s number or Avogadro’s constant.
    No. Of particles in 1 mole:
    1 mole of hydrogen atoms represents 6.022 × 1023 hydrogen atoms.
    1 mole of hydrogen molecules represents 6.022 × 1023 hydrogen molecules.
    1 mole of water molecules represents 6.022 × 1023 water molecules.

    3Thank You

    Aanchal Jaiswal 7 years, 2 months ago

    MOLE CONCEPT:- mole concept is carried out for calculation of particles ( atoms, molecules,ions) present in molecules.

    1Thank You

    ANSWER

    • Posted by Techinical Isuues 7 years, 2 months ago

    CBSE > Class 09 > Science
    • 2 answers

    Yogita Ingle 7 years, 2 months ago

    Thomson’s atomic model:   J.J. Thomson was the first to put forward a model to explain the structure of an atom. Thomson's atomic model is also called water melon model or Christmas pudding model. He compared the electrons with the raisins in the Spherical Christmas pudding and to seeds in a watermelon.
    Postulates of Thomson’s Model:

    • An atom consists of a positively charged sphere, with electrons set within the sphere.
    • An atom is electrically neutral as the positive and negative charges within it are equal. 

    1Thank You

    Aanchal Jaiswal 7 years, 2 months ago

    Thomson model of atom:- in this model of atom negative particles are embedded in positive sphere this model is also called water meal on structure of atom.

    1Thank You

    ANSWER

    • Posted by Techinical Isuues 7 years, 2 months ago

    CBSE > Class 09 > Science
    • 2 answers

    Shweta Singh ; The Software Engineer 7 years, 2 months ago

    ELECTRONS - electrons are negatively charged particle . it was discovered by J.J. Thomson PROTONS - protons are positively charged particle. It was discovered by Goldstein. NEUTRONS - neutrons have no charge. It is neutral. It was discovered by James Chadwick. Hope it help you....

    0Thank You

    Ankit Ambasta 7 years, 2 months ago

    Electrons are negatively charged particles. Protons are positively charged particles. Neutrons are particles with no charge.

    2Thank You

    ANSWER

    • Posted by Sayahnika Mishra 7 years, 2 months ago

    CBSE > Class 09 > Science
    • 3 answers

    Kumkum Sarswat 7 years, 2 months ago

    1 u

    0Thank You

    Ankit Ambasta 7 years, 2 months ago

    1u

    1Thank You

    Tanu Tr 7 years, 2 months ago

    Atomic mass of hydrogen is 1

    3Thank You

    ANSWER

    • Posted by Vaish Shukla 7 years, 2 months ago

    CBSE > Class 09 > Science
    • 2 answers

    Kumkum Sarswat 7 years, 2 months ago

    Number of electrons present in the outermost shell of an atom are known as valence electrons. ??????

    1Thank You

    Sayahnika Mishra 7 years, 2 months ago

    The number of electrons present in the outermost shell of an atom is called valence electrons

    1Thank You

    ANSWER

    • Posted by Rajiv Kumar 7 years, 2 months ago

    CBSE > Class 09 > Science
    • 2 answers

    Ankit Ambasta 7 years, 2 months ago

    Thanks if you like

    3Thank You

    Ankit Ambasta 7 years, 2 months ago

    Isobars -atoms with same atomic number but different mass number. Isotopes -atoms with different atomic no. but same mass no. Isotone -atoms with same no. of neutrons.

    3Thank You

    ANSWER

    • Posted by Simran Anand 7 years, 2 months ago

    CBSE > Class 09 > Science
    • 0 answers
    ANSWER

    • Posted by Excuse Man Crazy 7 years, 2 months ago

    CBSE > Class 09 > Science
    • 4 answers

    Kumkum Sarswat 7 years, 2 months ago

    Matter is classified in three states - solid liquid and gas

    1Thank You

    Excuse Man Crazy 7 years, 2 months ago

    1)on the basis of the physical state ,matter is classified into 3 main types. They are solids, liquid and gases 2)on the basis of chemical composition matter is classified into two main, types. They are elements and compounds mixture are of two types . They are homogeneous mixture and hetersgeous mixture.

    1Thank You

    Yogita Ingle 7 years, 2 months ago

    Classification of matter
    (1) Physical classification
    (i) Solid
    (ii) liquid
    (iii) Gases
    (2) Chemical classification
    (i) Homogeneous
    (ii) Heterogeneous

     

    1Thank You

    Ankit Ambasta 7 years, 2 months ago

    Matter are classified in three groups - Solid Liquid Gas Plasma Albert Bose concendration

    1Thank You

    ANSWER

    • Posted by Shet Singh 7 years, 2 months ago

    CBSE > Class 09 > Science
    • 3 answers

    Sneha Choudhury 7 years, 2 months ago

    Kingdom is a largest taxon

    0Thank You

    Sneha Yadav 7 years, 2 months ago

    The*

    0Thank You

    Sneha Yadav 7 years, 2 months ago

    Kingdom is thr higher taxon in the heirarchy of classification of organisms.

    0Thank You

    ANSWER

    • Posted by Pratham Pandey 7 years, 2 months ago

    CBSE > Class 09 > Science
    • 1 answers

    Ankit Ambasta 7 years, 2 months ago

    Friend you can practice all questions given in optional exercise in NCERT book

    2Thank You

    ANSWER

    • Posted by Yash Saini 7 years, 2 months ago

    CBSE > Class 09 > Science
    • 1 answers

    Ankit Ambasta 7 years, 2 months ago

    Work done=force×displacement W=F×S..........1 F=M×a...........2 S=(V"2—U"2)/2a......3 Fm. 1,2&3 Kinetic energy =M×a×(V"2—U"2)/2a. {where U=0} =1/2MV"2

    0Thank You

    ANSWER

    • Posted by Amit Kumar Bind 7 years, 2 months ago

    CBSE > Class 09 > Science
    • 2 answers

    Ankit Ambasta 7 years, 2 months ago

    Tissues that connect two parts (bone, muscle ,organs etc.) are known as connective tissue such as bone blood etc.)

    2Thank You

    Aman Barnwal 7 years, 2 months ago

    Connect One bone to another bone

    1Thank You

    ANSWER

    • Posted by Ismail Pk Puthumana 7 years, 2 months ago

    CBSE > Class 09 > Science
    • 7 answers

    Kumkum Sarswat 7 years, 2 months ago

    Protons are positively charged particles that are present in the nucleus of an atom ?????

    0Thank You

    Sayahnika Mishra 7 years, 2 months ago

    Protons are not negatively charged particles infact they are positively charged particles present in nucleus

    0Thank You

    Ankit Ambasta 7 years, 2 months ago

    Thanks if you like

    1Thank You

    Ankit Ambasta 7 years, 2 months ago

    Protons are positively charged particles embedded in nucleus of the atom. Protons are denoted as "p±".

    1Thank You

    Aman Barnwal 7 years, 2 months ago

    Protons are positively charge particle

    1Thank You

    Palak Bansal 5 years, 11 months ago

    Protons are negatively charged particles

    0Thank You

    Sneha Yadav 7 years, 2 months ago

    Protons are negatively charged particle present on nucleus of an atom

    0Thank You

    ANSWER

    • Posted by Vardhan Amrutia 7 years, 2 months ago

    CBSE > Class 09 > Science
    • 1 answers

    Aishwarya More 7 years, 2 months ago

    Area under the graph= distance S =area of triangle + area of rectangle = area of ABC+area of OBCD =1/2×base×height =1/2×t×(v-u)+t×(v) =t/2(u-atu)+ut S=ut+1/2at

    1Thank You

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