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    • Posted by Trishla Jain 5 years, 4 months ago

    CBSE > Class 09 > Science
    • 5 answers

    Trishla Jain 5 years, 4 months ago

    Hii Yogita Ingle Fan is doing rotatory motion not circular motion

    0Thank You

    Trishla Jain 5 years, 4 months ago

    Thanku all of u

    0Thank You

    Dhawal Khatri 5 years, 4 months ago

    Hello trishla

    1Thank You

    Yogita Ingle 5 years, 4 months ago

    Four examples of non-uniform circular motion.

    1. Fan 
    2. tires of a car
    3.  

    2Thank You

    Shree Kushwaha 5 years, 4 months ago

    Examples of non- uniform circular motions are : Oscillation of pendulum , the motion of a train, a person jogging in the park , hour hands of a watch

    1Thank You

    ANSWER

    • Posted by Ronak Gupta 5 years, 4 months ago

    CBSE > Class 09 > Science
    • 1 answers

    Mehbub Tahmim Ahmed 5 years, 4 months ago

    A high gain harmonic generation (HGHG) FEL can provide high- power radiation with a full transverse and longitudinal coherence and a shorter and undulations than a conventional SASE FEL wherein the radiation starts from noise.???️ Stay safe .jai hind ??.

    1Thank You

    ANSWER

    • Posted by Gayatri Rajbhar 5 years, 4 months ago

    CBSE > Class 09 > Science
    • 2 answers

    Dhawal Khatri 5 years, 4 months ago

    Hello Gayatri

    1Thank You

    Suzanne Smitha 5 years, 4 months ago

    If the system is under the application of friction force and no other force is applying on it then by using equation of linear motion v = u + at Here, v = 0.5 m/s , u =0 m/s and a = 0.5 m/s^2( acceleration is positive because it is in the direction of external force), then we have 0.5 =0 + 0.5t => t = 1 second

    3Thank You

    ANSWER

    • Posted by Gayatri Rajbhar 5 years, 4 months ago

    CBSE > Class 09 > Science
    • 1 answers

    Jiya ??? 5 years, 4 months ago

    Answer is 40m/s By using 1st equation of motion v=u+at

    1Thank You

    ANSWER

    • Posted by Gayatri Rajbhar 5 years, 4 months ago

    CBSE > Class 09 > Science
    • 3 answers

    Suzanne Smitha 5 years, 4 months ago

    Given: u=80 km/h = 200/9 m/s v=60 km/h = 150/9 m/s t=5 sec Acceleration=v-u÷t (150/9 - 200/9 )÷ 5 -50/(9×5) -10/9 -1.11 m/s So here acceleration= -1.11 m/s Or retardation = 1.11 m/s

    1Thank You

    Devansh Tyagi 5 years, 4 months ago

    Initial velocity -80km/h Final velocity -60km/h Time-5sec V=u+at 60=80+5×a 60-80=5a -20=5a -20÷5=a a=-4/metre per second

    3Thank You

    Gaurav Seth 5 years, 4 months ago

    U= initial velocity= 80 km/h = 22.2 m/s
    v= final velocity = 60 km/h = 16.7 m/s
    t= time = 5 s
    a= acceleration = ?

    a=v-u/t
    a= 16.7-22.2/5
    a= -5.5/5
    Therefore, a=-1.1 m/s^2

    2Thank You

    ANSWER

    • Posted by Ekta Kumari 5 years, 4 months ago

    CBSE > Class 09 > Science
    • 2 answers

    Jasmine Kaur 5 years, 4 months ago

    A change of state is a physical change in a matter. They are reversible changes and do not involve any changes in the chemical makeup of the matter. Common changes of the state include melting, freezing, sublimation, deposition, condensation, and vaporization

    1Thank You

    Yogita Ingle 5 years, 4 months ago

    On increase in temperature ice changes into water. On further increase in temperature water changes into vapor.

    Ice → Water → Vapour

    On decrease in temperature vapor changes into water. On further decrease in temperature water changes into ice.

    Vapour → Water → Ice

    2Thank You

    ANSWER

    • Posted by Hanshika (Honey) 5 years, 4 months ago

    CBSE > Class 09 > Science
    • 4 answers

    Devansh Tiwari 5 years, 4 months ago

    Who are you Dhairya Khandelwal and how day you to talk like this ???

    2Thank You

    Hanshika (Honey) 5 years, 4 months ago

    Should i report content? (dhairya khandelwal)???

    2Thank You

    Hanshika (Honey) 5 years, 4 months ago

    Thanks

    2Thank You

    Gaurav Seth 5 years, 4 months ago

    On July 7, HRD Minister Ramesh Pokhriyal announced a major CBSE syllabus reduction with 30% of the syllabus slashed for the year 2020-21 for classes 9 to 12 because of the reduction in classroom teaching time due to the Covid-19 pandemic and lockdown.

    Click on the link:

    <font color="#FF6600"><font style="box-sizing: border-box;">Revised Curriculum for the Academic Year 2020-21</font></font>

    <div class="panel-group" id="accordion" style="margin-bottom:5px; text-align:start; -webkit-text-stroke-width:0px"> <div class="panel panel-default" style="border:1px solid #dddddd; margin-bottom:0px; border-radius:4px"> <div class="panel-heading" style="border-bottom:0px #dddddd; padding:10px 15px; border-top-left-radius:3px; border-top-right-radius:3px; border-top-color:#dddddd; border-right-color:#dddddd; border-left-color:#dddddd">

    <a data-toggle="collapse" href="http://cbseacademic.nic.in/revisedcurriculum_2021.html#collapse2" style="box-sizing:border-box; color:inherit; text-decoration:none; display:block; font-weight:bold">Revised Secondary Curriculum (IX-X)</a>

    </div> </div> <div class="panel panel-default" style="border:1px solid #dddddd; margin-bottom:0px; border-radius:4px; margin-top:5px"> <div class="panel-heading" style="border-bottom:0px #dddddd; padding:10px 15px; border-top-left-radius:3px; border-top-right-radius:3px; border-top-color:#dddddd; border-right-color:#dddddd; border-left-color:#dddddd">

    <a data-toggle="collapse" href="http://cbseacademic.nic.in/revisedcurriculum_2021.html#collapse1" style="box-sizing:border-box; color:inherit; text-decoration:none; display:block; font-weight:bold">Revised Senior Secondary Curriculum (XI-XII)</a>

    </div> </div> </div>

    3Thank You

    ANSWER

    • Posted by Vinoth Xp 5 years, 4 months ago

    CBSE > Class 09 > Science
    • 5 answers

    Malavika A S 5 years, 4 months ago

    Lipids and proteins

    2Thank You

    Devansh Tyagi 5 years, 4 months ago

    Phospolipids bilayer and proteins

    2Thank You

    Arya Mahajan 5 years, 4 months ago

    Phospholipids and protein

    1Thank You

    Hanshika (Honey) 5 years, 4 months ago

    Lipids and proteins

    1Thank You

    Gaurav Seth 5 years, 4 months ago

    Plasma membrane is the outermost covering of the cell which is made up of phospholipids bilayer and proteins.

    1Thank You

    ANSWER

    • Posted by Aarohi Shrivastava 5 years, 4 months ago

    CBSE > Class 09 > Science
    • 4 answers

    Devansh Tiwari 5 years, 4 months ago

    A diameter i.e. 2R

    0Thank You

    Suzanne Smitha 5 years, 4 months ago

    The answer will be 2r.  We all know that displacement is all about the total distance measured between initial and final points.  After the particle cover half path of the circle, the displacement can be easily calculated by measuring the distance between initial and final points.  Displacement after half circle = AB=OA + OB Hence, the displacement after half circle is 2r.

    0Thank You

    Yogita Ingle 5 years, 4 months ago

    Displacement at half path is the shortest distance between the initial and final point.
    So, it's equal to twice the radius of the circle =2r

    0Thank You

    Sarita Panda 5 years, 4 months ago

    The displacement , after half a circle, would be equal to the diameter of the circle .So displacement would be equal to twice of r (i.e. the diameter).

    0Thank You

    ANSWER

    • Posted by Rohith Jutla 5 years, 4 months ago

    CBSE > Class 09 > Science
    • 5 answers

    Divya Gupta 5 years, 4 months ago

    Water

    0Thank You

    Satish Shina 5 years, 4 months ago

    Fire

    0Thank You

    Pankaj Gautam 5 years, 4 months ago

    A option is correct

    0Thank You

    Shree Kushwaha 5 years, 4 months ago

    Water option a(✓)

    0Thank You

    Suzanne Smitha 5 years, 4 months ago

    a.water

    0Thank You

    ANSWER

    • Posted by Anmol Dwivedi 5 years, 4 months ago

    CBSE > Class 09 > Science
    • 4 answers

    Aswath Gokul 5 years, 4 months ago

    Saturated solution is a solution in which no more solute can added at the temperature

    0Thank You

    Pankaj Gautam 5 years, 4 months ago

    A saturated solution is a solution which can dissolve no more solute

    1Thank You

    Suzanne Smitha 5 years, 4 months ago

    A saturated solution is a solution which can dissolve no more solute. It is important to know these two terms, solute and solvent. Solute is the thing that you are dissolving (example: table salt) and solvent is the thing you are dissolving the solute on (example: water).

    1Thank You

    Meghna Thapar 5 years, 4 months ago

    The term saturated solution is used in chemistry to define a solution in which no more solute can be dissolved in the solvent. It is understood that saturation of the solution has been achieved when any additional substance that is added results in a solid precipitate or is let off as a gas. A saturated solution is a solution which can dissolve no more solute. Solute is the thing that you are dissolving (example: table salt) and solvent is the thing you are dissolving the solute on (example: water).

    1Thank You

    ANSWER

    • Posted by Yug Agarwal 5 years, 4 months ago

    CBSE > Class 09 > Science
    • 1 answers

    Yug Agarwal 5 years, 4 months ago

    (a) Both the Assertion and the Reason are correct and the Reason is the correct explanation of the Assertion.

    1Thank You

    ANSWER

    • Posted by It'S Preeti.... 333 5 years, 4 months ago

    CBSE > Class 09 > Science
    • 5 answers

    Arya Mahajan 5 years, 4 months ago

    The RER helps in protein synthesis as it has ribosomes on its surface

    1Thank You

    Suzanne Smitha 5 years, 4 months ago

    The function of the rough endoplasmic reticulum (ER) is to produce a fully-functioning protein.Ribosomes residing on the endoplasmic reticulum give it a non-smooth appearance, hence the name Rough ER. These fully-functioning proteins are the working molecules within every cell that perform most all functional work. Fully-functioning proteins repair muscles, lubricate your brain, provide communication between cells, perform liver function,EVERYTHING!!! They do this by using the common energy currency in the cell, ATP. This is one of the major advantages that complex cellular species (eukaryotes, including plants, fungi, animals, humans) have. They have the full complex protein manufacturing factory (rough ER, Golgi apparatus, supporting proteins). Bacteria do not have this rough ER, and hence are not equipped with the full protein factory that complex species have. Fully-functioning proteins can be used inside the cell for its own operation and maintenance AND can also be packaged for transportation out of the cell for use elsewhere. The steps to making a protein are transcription, translation, and complex folding. All living cells, including bacteria can perform transcription and translation, but only eukaryotic cells can perform the complex folding function. Transcription is the cellular process of making a messenger RNA (mRNA) from the DNA and the subsequent transportation of it out of the nuclear envelope. Translation is the cellular process of making an animo acid chain from the mRNA. Translation occurs on the Rough ER. Complex folding continues in the Golgi apparatus. The surface of the Rough ER is studded with ribosomes. These ribosomes perform the work of the translation of the mRNA into an amino acid chain. The Rough ER is typically located near, and continuous with, the outer layer of the nuclear envelope, utilizing large double membrane sheets that overlap onto each other. (The Golgi apparatus does not have a continuous membrane with the Rough ER; the started amino acid chains are transported from the Rough ER to the Golgi with little membrane-enclosed transportation pods, called vesicles. Also, the Rough ER continually works with the Golgi apparatus in the production of these fully-functioning proteins, including the marking of its target location and its packaging.) Ribosomes are a very primal molecular motor, originating from an RNA World. But these ribosomes perform their work very efficiently and all life forms use ribosomes to manufacture proteins. The development of complicated molecular machinery to form fully-functioning, complex, packaged proteins is one of the enablers that allowed the development of the eukaryotic cell and all subsequent, complex life. The development of the eukaryotic cell from bacteria is an active area of investigation by scientists at the current time. Exciting stuff, indeed!!!

    2Thank You

    Bhagyesh Kame 5 years, 4 months ago

    The rough endoplasmic reticulum consists of ribosomes(synthesised by nucleolus). The main function of ribosomes is synthesis of proteins. Therefore the rough endoplasmic reticulum are associated with synthesis of proteins for intracellular activities like membrane biogenesis

    1Thank You

    Nisha Upadhyay 5 years, 4 months ago

    Function of roigh endoplasmic reticulum is tge formation of protien or protien synthesis

    1Thank You

    Soumya Phattepur 5 years, 4 months ago

    It's function is to produce proteins for the rest of the cell to function

    4Thank You

    ANSWER

    • Posted by Mehbub Tahmim Ahmed 5 years, 4 months ago

    CBSE > Class 09 > Science
    • 5 answers

    Neha S 5 years, 4 months ago

    V=U+AT

    1Thank You

    Sakshi Kumari 5 years, 4 months ago

    V=u+at

    1Thank You

    Shubham Prakash 5 years, 4 months ago

    V^2- u^2 = 2as

    1Thank You

    Shubham Prakash 5 years, 4 months ago

    S = ut + 1/2 at^2

    1Thank You

    Shubham Prakash 5 years, 4 months ago

    V=u + at

    1Thank You

    ANSWER

    • Posted by Nargis Pillai 5 years, 4 months ago

    CBSE > Class 09 > Science
    • 5 answers

    Nargis Pillai 5 years, 4 months ago

    Thnk u☺

    1Thank You

    Arya Mahajan 5 years, 4 months ago

    a strand of conducting vessels in the stem or leaves of a plant, typically with phloem on the outside and xylem on the inside.

    1Thank You

    Bhagyesh Kame 5 years, 4 months ago

    The xylem tissue and phloem tissue together are known as vascular bundles

    1Thank You

    Atul Kumar Dwivedi 5 years, 4 months ago

    A unit strand of the vascular system and leaves of higher plants consisting essentially of xylem and phloem is called vascular bundles

    1Thank You

    Yogita Ingle 5 years, 4 months ago

    A vascular bundle is a part of the transport system in vascular plants. Vascular bundle is a unit strand of the vascular system in stems and leaves of higher plants, consisting essentially of xylem and phloem. Usually vascular bundle has phloem on the outside and xylem on the inside.

    3Thank You

    ANSWER

    • Posted by Ishita Agrawal 5 years, 4 months ago

    CBSE > Class 09 > Science
    • 1 answers

    Yogita Ingle 5 years, 4 months ago

    1) ELECTRICAL ENERGY-HYDRO POWER DAM,MOTOR

    2) LIGHT ENERGY-SUN,ANY LUMINOUS SOURCE

    3) SOUND ENERGY-MICROPHONE,SOUND BOX

    4) WIND ENERGY-WINDMILL

    5) CHEMICAL ENERGY-BATTERY

    0Thank You

    ANSWER

    • Posted by Femi Binod 5 years, 4 months ago

    CBSE > Class 09 > Science
    • 5 answers

    Neha S 5 years, 4 months ago

    Displacement and velocity

    1Thank You

    Tanya Negi 5 years, 4 months ago

    Velocity

    1Thank You

    Shree Kushwaha 5 years, 4 months ago

    Option B displacement. (✓). Option D velocity (✓)

    3Thank You

    Navdeep Singh 5 years, 4 months ago

    B.) and D.)

    2Thank You

    Arjun Das 5 years, 4 months ago

    Velocity and displacement

    1Thank You

    ANSWER

    • Posted by Femi Binod 5 years, 4 months ago

    CBSE > Class 09 > Science
    • 5 answers

    Devansh Tyagi 5 years, 4 months ago

    Momentum

    2Thank You

    Pankaj Gautam 5 years, 4 months ago

    Electric energy

    1Thank You

    Neha S 5 years, 4 months ago

    Electric energy

    1Thank You

    Divya Gupta 5 years, 4 months ago

    Electric energy

    1Thank You

    Yogita Ingle 5 years, 4 months ago

     electric energy

    1Thank You

    ANSWER

    • Posted by Femi Binod 5 years, 4 months ago

    CBSE > Class 09 > Science
    • 3 answers

    Atul Kumar Dwivedi 5 years, 4 months ago

    Option c

    1Thank You

    Soumya Phattepur 5 years, 4 months ago

    Power

    2Thank You

    Shree Kushwaha 5 years, 4 months ago

    Electric field option C(✓)

    2Thank You

    ANSWER

    • Posted by Femi Binod 5 years, 4 months ago

    CBSE > Class 09 > Science
    • 3 answers

    Devansh Tyagi 5 years, 4 months ago

    Scalar distance speed vector displacement velocity

    1Thank You

    Yogita Ingle 5 years, 4 months ago

    There are plenty of scalar quantity examples, some of the common examples are:

    • Mass
    • Speed
    • Distance
    • Time
    • Area
    • Volume
    • Density
    • Temperature

    Vector quantity examples are many, some of them are given below:

    • Linear momentum
    • Acceleration
    • Displacement
    • Momentum
    • Angular velocity
    • Force
    • Electric field

    1Thank You

    Purusaif Saifpuru 5 years, 4 months ago

    Scalar distance ,speed Vector displacement.velocity

    1Thank You

    ANSWER

    • Posted by Vallabh Pawar 5 years, 4 months ago

    CBSE > Class 09 > Science
    • 1 answers

    Gaurav Seth 5 years, 4 months ago

    1. Atom : An atom is the smallest indivisible unit of an
      OR
      Atom is the smallest unit of matter.
    2. Molecule : Molecule is the smallest unit of a compound (or an element) which always has an independent existence.

    1Thank You

    ANSWER

    • Posted by Ananya Mayawala 5 years, 4 months ago

    CBSE > Class 09 > Science
    • 1 answers

    Gaurav Seth 5 years, 4 months ago

    2S2=S1

    as S2 travels twice distance of s1 in the same time.

    let us consider that both takes time x to reach at point b from a.

    so by the given condition in the time s1 covers some distance(d) s2 will cover distance (2d) in same time

    1Thank You

    ANSWER

    • Posted by Yashraj More 5 years, 4 months ago

    CBSE > Class 09 > Science
    • 5 answers

    Madhusmita Sahu 5 years, 4 months ago

    Colloid are nither heterogeneous nor homogenous

    0Thank You

    Atul Kumar Dwivedi 5 years, 4 months ago

    Milk and starch

    0Thank You

    Soumya Phattepur 5 years, 4 months ago

    Milk and starch solutions show Tyndall effect bcoz they are colliods ,and colloid is not a true solution

    1Thank You

    Sangam Singh 5 years, 4 months ago

    Milk and starch solution will show tyndall effect because they are colloids. A colloid is a kind of solution in which the size of solute particles is intermediate between those in true solutions and those in suspensions. A colloid is not a true solution. The scattering of light by colloidal particle is known as tyndall effect. The scattering of light by Colloidal Solutions tells us that the colloidal particles are much bigger than the particles of a true solution. True solution does not scatter a beam of light passing through it but a Colloidal solutions scatters a beam of light passing through it. Colloids are heterogeneous in nature though they appear to be homogeneous.

    1Thank You

    Gaurav Seth 5 years, 4 months ago

    Milk and starch solution will show tyndall effect because they are colloids.

    A colloid is a kind of solution in which the size of solute particles is intermediate between those in true solutions and those in suspensions.

    A colloid is not a true solution.

    The scattering of light by colloidal particle is known as tyndall effect.
    The scattering of light by Colloidal Solutions tells us that the colloidal particles are much bigger than the particles of a true solution.

    True solution does not scatter a beam of light passing through it but a Colloidal solutions scatters a beam of light passing through it.

    Colloids are heterogeneous in nature though they appear to be homogeneous.

    1Thank You

    ANSWER

    • Posted by Ananya Mayawala 5 years, 4 months ago

    CBSE > Class 09 > Science
    • 4 answers

    Divya Gupta 5 years, 4 months ago

    It is in motion

    1Thank You

    Soumya Phattepur 5 years, 4 months ago

    The moving dog is in motion

    1Thank You

    Shree Kushwaha 5 years, 4 months ago

    It is in motion

    1Thank You

    Purusaif Saifpuru 5 years, 4 months ago

    It is in motion

    1Thank You

    ANSWER

    • Posted by Abcd Green 5 years, 4 months ago

    CBSE > Class 09 > Science
    • 3 answers

    Shreyansh Jain 5 years, 4 months ago

    9.8N

    0Thank You

    Bhumi Ahuja 5 years, 4 months ago

    Since,Earth is big ,we feel its gravitational pull. The gravitational force between the earth and the sun sticks us together.gravity exist everywhere.there is a mass. Gravitational attraction or simple gravity directly proportional to mass.

    3Thank You

    Kanishtha Sarathe 5 years, 4 months ago

    Maths

    1Thank You

    ANSWER

    • Posted by Manoj Kumar Pradhan 5 years, 4 months ago

    CBSE > Class 09 > Science
    • 2 answers

    Shree Kushwaha 5 years, 4 months ago

    1. Drink clean water. 2. Keep your surroundings clean 3 . Cover ur mouth or nose while coughing and sneezing.

    0Thank You

    Yogita Ingle 5 years, 4 months ago

    Precautions to reduce incidence of infectious diseases are:

    (i) Stay away from the diseased person.
    (ii) Cover your mouth or nose while coughing or sneezing to prevent the spread of disease.
    (iii) Drink safe water.
    (iv) Keep the environment clean to prevent mosquitoes from breeding.

    2Thank You

    ANSWER

    • Posted by Jasmine Kaur 5 years, 4 months ago

    CBSE > Class 09 > Science
    • 3 answers

    Madhusmita Sahu 5 years, 4 months ago

    Gaurav you are a nice student

    0Thank You

    Amrit Raj 5 years, 4 months ago

    Melting, change of a solidinto a liquid when heat is applied. In a pure crystalline solid, this process occurs at a fixed temperature called the melting point; an impure solid generally melts over a range of temperatures below the melting point of the principal component. Amorphous (non-crystalline) substances such as glass or pitch melt by gradually decreasing in viscosity as temperature is raised, with no sharp transition from solid to liquid.

    1Thank You

    Gaurav Seth 5 years, 4 months ago

    • Diffusion is the movement of particles from a high concentration to a low concentration. Brownian motion is the diffusion of many particles.

    • Melting point is the temperature at which a solid changes its phase to become a liquid. The process is called melting.

    4Thank You

    ANSWER

    • Posted by Gayatri Rajbhar 5 years, 4 months ago

    CBSE > Class 09 > Science
    • 5 answers

    Neha S 5 years, 4 months ago

    speed=total distance/total time taken so, total distance =1384 km total time taken=17 hrs substitute the value in the formula =1384/17 =81 km/hr

    1Thank You

    Neha S 5 years, 4 months ago

    speed =total distance/total time taken

    1Thank You

    Jasmine Kaur 5 years, 4 months ago

    Distance=s=1384 km time interval= 4:00 pm to 9:00 am Let 4:00 pm be 1 hr. After 12 hours half of the day is complete. So, after 12 hours the time would be 4:00 am. But, the final time is 9:00 am and time difference between 9:00 am and 4:00 am is 5 hours. So the total time taken=12+5=17 hours We know that, average speed = total distance travelled/total time taken                                             =1384/17=81 km/h

    3Thank You

    Gaurav Seth 5 years, 4 months ago

    The Rajdhani Express travels from Mumbai to Delhi a distance of 1384 km.

     

    Its Starts from Mumbai at 4.00 p.m. and reaches Delhi at 9.00 a.m., the next day.

    So,

    Total Distance travelled = 1384 km

    Total Time taken = 17 hours

     

    So We know that

    Average speed =

     

    Total Distance travelled/ Total time taken

    = 81.4 km/ h

     

    So, The Average speed is 81.4 km per hour.

    2Thank You

    Yogita Ingle 5 years, 4 months ago

    Distance=s=1384 km
    time interval= 4:00 pm to 9:00 am
    Let 4:00 pm be 1 hr.
    After 12 hours half of the day is complete. So, after 12 hours the time would be 4:00 am. But, the final time is 9:00 am and time difference between 9:00 am and 4:00 am is 5 hours.
    So the total time taken=12+5=17 hours
    We know that, average speed = total distance travelled/total time taken
                                                =1384/17=81 km/h

    2Thank You

    ANSWER

    • Posted by Raghav . 5 years, 4 months ago

    CBSE > Class 09 > Science
    • 2 answers

    Anupriya Kumari 5 years, 4 months ago

    A cavity is a hole that can grow bigger and deeper over time. It is also called dental caries. It is also a type of bacteria, if we do not brush our teeth then harmful bacteria also grows and break down the sugars in our food and release acid. This acid is very harmful for our teeth if it is released then it damages our teeth this is called tooth decay and when after tooth decay and a tiny hole appears on the surface of teeth which slowly gets bigger is called cavity.

    0Thank You

    Sreedevi Bandi 5 years, 4 months ago

    ,,,,,,,,,,,,,,,,,,,,,,,,,,................. ............. ....... ........... ..... ,, ,,,,,,,,,,,,,,,,,,,,,,,,, ,,,,, ,,,,,,,,,,,,,, ..................,,,,,,,

    2Thank You

    ANSWER

    • Posted by Arpita Gautam 5 years, 4 months ago

    CBSE > Class 09 > Science
    • 1 answers

    Yogita Ingle 5 years, 4 months ago

    While doing cooking, generally we add salt to vegetables ( contains water).
    Adding salt, makes the concentration of salt higher in outside membrane of vegetables than in inside. ( more salt, less water)

    As a result, due the process of OSMOSIS, water from vegetables comes outside making it softer and helps in faster cooking.

    1Thank You

    ANSWER

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