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    • Posted by Aditya Kumar 5 years, 2 months ago

    CBSE > Class 09 > Science
    • 2 answers

    Abhishek Chaudhary 5 years, 2 months ago

    A vector is an object that has magnitude and velocity . Ex = force and velocity

    2Thank You

    Deepanshi Antil 5 years, 2 months ago

    A vector is an object that has both a magnitude and a direction. Ex force and velocity

    4Thank You

    ANSWER

    • Posted by Muskan Singh 5 years, 2 months ago

    CBSE > Class 09 > Science
    • 2 answers

    Yogita Ingle 5 years, 2 months ago

    When fireman directs a large amount of water at a high velocity on fire from a hose pipe, they have to hold the hose pipe strongly because of its tendency to go backwards. The backward movement of the hose pipe is due to the backward reaction force of water rushing out through it in the forward direction at a high speed as per the Newton's third law of motion.

    3Thank You

    Ananya K 5 years, 2 months ago

    Therefore, in order to conserve momentum, the hose tends to move in the backward direction and hence is difficult to hold, or The ejection of large amounts of water at a high velocity from a hosepipe results in the development of an equal force of reaction on the hosepipe in the backward direction.Dec

    2Thank You

    ANSWER

    • Posted by Ananya K 5 years, 2 months ago

    CBSE > Class 09 > Science
    • 2 answers

    Ananya K 5 years, 2 months ago

    Thanks

    0Thank You

    Yogita Ingle 5 years, 2 months ago

    Sieve tubes, companion cells, phloem fibres and phloem parenchyma are the different elements of phloem.

    2Thank You

    ANSWER

    • Posted by Ananya K 5 years, 2 months ago

    CBSE > Class 09 > Science
    • 3 answers

    Rohit Gupta 5 years, 2 months ago

    Parenchyma cells have thin cellulosic cell walls. Collenchyma cells have thicker cellulosic walls and also may have pectin deposition on corners. Sclerenchyma cells have thick lignified cell walls and are dead at maturity and provide protection to the different parts of the body. Epithelial cells are thin-walled and living.

    0Thank You

    Ananya K 5 years, 2 months ago

    Thanks

    1Thank You

    Yogita Ingle 5 years, 2 months ago

    Parenchyma cells have thin cellulosic cell walls. Collenchyma cells have thicker cellulosic walls and also may have pectin deposition on corners. Sclerenchyma cells have thick lignified cell walls and are dead at maturity and provide protection to the different parts of the body. Epithelial cells are thin-walled and living.

    2Thank You

    ANSWER

    • Posted by Charming Princess? 5 years, 2 months ago

    CBSE > Class 09 > Science
    • 2 answers

    Rohit Gupta 5 years, 2 months ago

    Corona virus

    0Thank You

    Ananya K 5 years, 2 months ago

    common cold. flu. meningitis. warts, including genital warts. oral and genital herpes. chickenpox/shingles. measles. viral gastroenteritis, including norovirus and rotavirus.

    2Thank You

    ANSWER

    • Posted by Kanika Kanika 5 years, 2 months ago

    CBSE > Class 09 > Science
    • 1 answers

    Ananya K 5 years, 2 months ago

    Crystallization is obtained by first turning the solution into a supersaturated solution through heating i.e. evaporation, and then cooling i.e. the condensation process that supersaturated solution so that crystal formation can begin

    0Thank You

    ANSWER

    • Posted by Charming Princess? 5 years, 2 months ago

    CBSE > Class 09 > Science
    • 1 answers

    Meghna Thapar 5 years, 2 months ago

    • Infectious and non-infectious causes:

    One of the causes of diseases is the infectious agents, mostly called microbes or micro-organisms. Diseases where microbes are the immediate causes are called infectious diseases. This is because they spread the diseases in the community.

    Some diseases are not caused by infectious agents. Their causes vary, but they are not external causes like microbes that can spread in the community. Instead, these are mostly internal, non-infectious causes. Such diseases are called non-infectious diseases. For example, cancer is caused by genetic abnormalities. High blood pressure can be caused by excessive weight and lack of exercise. Different diseases spread by different means and can be treated and prevented at community level.

     

    • Infectious diseases:
    • Infectious agents:

    Organisms that can cause disease are found in a wide range of such categories. Some of them are viruses, bacteria, fungi, protozoans or multicellular organisms, such as worms.

     

     

    Category of Infectious Agent

    Examples of Diseases Caused

    Virus

    Common cold, influenza, Dengue fever, AIDS

    Bacteria

    Typhoid, cholera, tuberculosis, anthrax

    Fungi

    Skin infections

    Protozoans

    Malaria, kala-azar

    Worms

    Intestinal worm infections, elephantiasis

     

    0Thank You

    ANSWER

    • Posted by Charming Princess? 5 years, 2 months ago

    CBSE > Class 09 > Science
    • 1 answers

    Meghna Thapar 5 years, 2 months ago

    An infectious disease can be spread and is caused by a pathogen. A noninfectious disease cannot be spread and is caused different factors.

    Infectious causes: They include the agents like microbes or micro-organisms as the immediate causes which spread the disease from an infected person to a healthy person.

    Non-infectious causes: The disease which does not spread by contact between infected and healthy person through air and water, is called non-infectious disease.

    Infectious Diseases: The diseases which spread due to infection by micro-organisms are called infectious diseases.

    When a disease causing organism enters our body it causes infection, it multiplies and grows in the body called host and micro-organisms multiplies in the host body.

    For example: Tuberculosis, tetanus, Common cold, AIDS, etc.

    Non-infectious Diseases: The disease which does not spread by contact between infected and healthy person through air and water, is called non-infectious disease.

    For example: Cancer, genetic abnormalities, high blood pressure, etc.
     

    0Thank You

    ANSWER

    • Posted by Charming Princess? 5 years, 2 months ago

    CBSE > Class 09 > Science
    • 1 answers

    Meghna Thapar 5 years, 2 months ago

    • Acute and chronic diseases:

    Some diseases last for only very short periods of time and their symptoms are quickly visible, they are called acute diseases. Example – common cold, cough, typhoid, etc. They do not cause long term bad effects on the body.

    The ailments which can last for a long time, even as much as a lifetime, and their symptoms lasts for months or years, are called chronic diseases. Example – tuberculosis, cancer, diabetes, etc. They cause drastic long term effects on human body.

    0Thank You

    ANSWER

    • Posted by Luis Fonsi 5 years, 2 months ago

    CBSE > Class 09 > Science
    • 2 answers

    Ananya K 5 years, 2 months ago

    Signs and symptoms are abnormalities that can indicate a potential medical condition. Whereas a symptom is subjective, that is, apparent only to the patient (for example back pain or fatigue), a sign is any objective evidence of a disease that can be observed by others (for example a skin rash or lump)

    0Thank You

    Meghna Thapar 5 years, 2 months ago

    Signs and symptoms are abnormalities that can indicate a potential medical condition. Whereas a symptom is subjective, that is, apparent only to the patient (for example back pain or fatigue), a sign is any objective evidence of a disease that can be observed by others (for example a skin rash or lump). A fever is a temporary increase in your body temperature, often due to an illness. Having a fever is a sign that something out of the ordinary is going on in your body. For an adult, a fever may be uncomfortable, but usually isn't a cause for concern unless it reaches 103 F (39.4 C) or higher.

    0Thank You

    ANSWER

    • Posted by Rishita Soni 5 years, 2 months ago

    CBSE > Class 09 > Science
    • 3 answers

    Muthu Dainy 5 years, 2 months ago

    You can install the" ncert solutions for class 9" from the playstore

    0Thank You

    Jasleen Chhabra 5 years, 2 months ago

    N all the Ncert solutions are in he app only?

    0Thank You

    Jasleen Chhabra 5 years, 2 months ago

    Rajni...in which subject

    0Thank You

    ANSWER

    • Posted by Rishita Soni 5 years, 2 months ago

    CBSE > Class 09 > Science
    • 0 answers
    ANSWER

    • Posted by Rishita Soni 5 years, 2 months ago

    CBSE > Class 09 > Science
    • 0 answers
    ANSWER

    • Posted by Seema Sing 5 years, 2 months ago

    CBSE > Class 09 > Science
    • 1 answers

    Fatima Zehra Khan 5 years, 2 months ago

    Initial velocity = 0 m/s (as it starts from rest) Final velocity = 200m/s Time = 30 seconds Acceleration = v - u/t =200 - 0/30 = 6.6 m/s²

    4Thank You

    ANSWER

    • Posted by Harveen Kaur 5 years, 2 months ago

    CBSE > Class 09 > Science
    • 1 answers

    Lavishka Choudhary 5 years, 2 months ago

    Velocity of the motorbike is $$54km/hr So, the acceleration in  k/hr2 is: 601​56​=54×60 =3240km/h2 And,  The acceleration in m/s2 is: 3600×36003240×1000​ =.25m/s2

    0Thank You

    ANSWER

    • Posted by Mahes Kumar 5 years, 2 months ago

    CBSE > Class 09 > Science
    • 1 answers

    Hisham Ichoo 5 years, 2 months ago

    What

    0Thank You

    ANSWER

    • Posted by Ayush Kumar 5 years, 2 months ago

    CBSE > Class 09 > Science
    • 2 answers

    Yogita Ingle 5 years, 2 months ago

    The types of simple tissues are parenchyma, collenchyma, sclerenchyma and aerenchyma.

    3Thank You

    Ayush Kumar 5 years, 2 months ago

    There are three types of simple tissue 1parenchyma 2 Collenchyma 3 seclenchyma

    2Thank You

    ANSWER

    • Posted by Pratibha Pratibha 5 years, 2 months ago

    CBSE > Class 09 > Science
    • 1 answers

    Ananya K 5 years, 2 months ago

    Acceleration has the dimensions of velocity (L/T) divided by time, i.e. L T−2. The SI unit of acceleration is the metre per second squared (m s−2); or "metre per second per second", as the velocity in metres per second changes by the acceleration value, every second. SI unit: m/s2, m·s−2, m s−2 Dimension: L T −2

    0Thank You

    ANSWER

    • Posted by Madhwi ? 5 years, 2 months ago

    CBSE > Class 09 > Science
    • 4 answers

    Ananya K 5 years, 2 months ago

    In case of uniform composition, the molecules of all the components are arranged uniformly throughout the mixture. It is not possible to recognize them individually as the mixture gets a uniform texture. In case of non-uniform mixture, the presence of the components can be recognized

    0Thank You

    Avneesh Bhaskar 5 years, 2 months ago

    The matter in our saroundinng

    0Thank You

    Yogita Ingle 5 years, 2 months ago

    • In case of uniform composition, the molecules of all the components are arranged uniformly throughout the mixture.
    • It is not possible to recognize them individually as the mixture gets a uniform texture.

    1Thank You

    Sunny Kumar 5 years, 2 months ago

    Which of the following is a chemical change

    0Thank You

    ANSWER

    • Posted by Divyahb Divya 5 years, 2 months ago

    CBSE > Class 09 > Science
    • 0 answers
    ANSWER

    • Posted by Gourav Bajaj 5 years, 2 months ago

    CBSE > Class 09 > Science
    • 5 answers

    Adarsh Maurya 5 years, 2 months ago

    Cll Bina live possible Nahin Hai

    0Thank You

    Vishal Sharma 5 years, 2 months ago

    Cell is the smallest unit of body

    0Thank You

    Bhumika Sharma ✓ 5 years, 2 months ago

    Cell, the basic membrane-bound unit that contains the fundamental molecules of life and of which all living things are composed. ... These cells cooperate with other specialized cells and become the building blocks of large multicellular organisms, such as humans and other animals.........nice to help u ☺️.

    1Thank You

    Madhu 433576 5 years, 2 months ago

    Cells are the structural, functional, and biological units of all living beings. A cell can replicate itself independently. Hence, they are known as the building blocks of life.

    3Thank You

    Yogita Ingle 5 years, 2 months ago

    Cells are the structural, functional, and biological units of all living beings. A cell can replicate itself independently. Hence, they are known as the building blocks of life. 

    1Thank You

    ANSWER

    • Posted by Divya Singh 5 years, 2 months ago

    CBSE > Class 09 > Science
    • 3 answers

    Divya Singh 5 years, 2 months ago

    Thank you so much

    1Thank You

    Yogita Ingle 5 years, 2 months ago

    1 mole of nitrogen atoms is equivalent to the gram atomic mass of nitrogen. Therefore, 1 mole of nitrogen atoms contains 14 g.

    1Thank You

    Ananya K 5 years, 2 months ago

    The question is What is the mass of 1 mole nitrogen atom? And ur answer is 14grams

    1Thank You

    ANSWER

    • Posted by Tiger$ Praful Jawale 5 years, 2 months ago

    CBSE > Class 09 > Science
    • 3 answers

    Divya Singh 5 years, 2 months ago

    Neli Bohr theory

    2Thank You

    Anshika Choudhary 5 years, 2 months ago

    Neli bohr theory

    3Thank You

    Chandana Chandu 5 years, 2 months ago

    It's Neil's Bohr Theory

    3Thank You

    ANSWER

    • Posted by Muskan Singh 5 years, 2 months ago

    CBSE > Class 09 > Science
    • 2 answers

    Yogita Ingle 5 years, 2 months ago

    The drawback of Rutherford model is: 

    It can't explain the stability of an atom. As per the model, the orbital revolution of electrons around the nucleus is not stable as the revolving electrons in orbits will undergo acceleration and emit energy. This will result in loss of energy of electrons and they will ultimately fall into the nucleus.

    1Thank You

    Tiger$ Praful Jawale 5 years, 2 months ago

    1) HE SAID THAT : THE ELECTRON COMES TO NUCLESUS ... IF ELETROS COME TO NUCLEUS IT WILL CO LAPSE ....................... THIS IS ONE OF THE DRAW BACKS HOPE HELPES YOU THAK U.

    4Thank You

    ANSWER

    • Posted by Abhishek Kumar Sinha 5 years, 2 months ago

    CBSE > Class 09 > Science
    • 1 answers

    Yogita Ingle 5 years, 2 months ago

    In unicellular organisms, the cell is capable of performing the different life processes with the help of the different cellular organelles. The division of labour in multicellular organisms refers to the presence of different organ systems that are incharge of taking care of a particular life process. For example, the respiratory system, helps the body in obtaining oxygen from the air and supplying it to the rest of the body.

    0Thank You

    ANSWER

    • Posted by Jay Kushwaha 5 years, 2 months ago

    CBSE > Class 09 > Science
    • 2 answers

    Bhumika Sharma ✓ 5 years, 2 months ago

    Mast cells are long-lived tissue-resident cells with an important role in many inflammatory settings including host defence to parasitic infection and in allergic reactions..............nice to help u ☺️.

    1Thank You

    Kalpana Singh 5 years, 2 months ago

    A type of white blood cell that is found in connective tissues all through in body, especially under the skin, near blood vessels and lymph vessels, in nerves, and in the lungs and intestines. .... Mast cell are part of the body's immune system.

    1Thank You

    ANSWER

    • Posted by Simon Chauhan 5 years, 2 months ago

    CBSE > Class 09 > Science
    • 1 answers

    Lavishka Choudhary 5 years, 2 months ago

    Projectile motion is a form of motion experienced by an object or particle that is projected near the Earth's surface and moves along a curved path under the action of gravity only. This curved path was shown by Galileo to be a parabola, but may also be a line in the special case when it is thrown directly upwards.

    0Thank You

    ANSWER

    • Posted by Simon Chauhan 5 years, 2 months ago

    CBSE > Class 09 > Science
    • 2 answers

    Zoya . 5 years, 2 months ago

    Acts as a binding tissue. Bind the skin with muscles. Bind the blood vessels and nerves with other structures of body. Helps in healing of wounds.

    0Thank You

    Sujita N B 5 years, 2 months ago

    Areolar connective tissue is one of six forms of connective tissue within the body and is named after the airy appearance of the tissue. It is found surrounding blood vessels, nerve bundles, muscles, and organs. It also fills the spaces between organs and connects your skin to your underlying muscle.

    0Thank You

    ANSWER

    • Posted by Sharanpreet Singh Lubana 5 years, 3 months ago

    CBSE > Class 09 > Science
    • 3 answers

    Samruddhi Fukat 5 years, 2 months ago

    There is attraction between the particles of matter.

    1Thank You

    Kartikey Pandey 5 years, 2 months ago

    There is spaces present between particles of matter of liquid that is why a diver is able to cut throug wayer in a swimming pool

    1Thank You

    Ananya K 5 years, 3 months ago

    The driver is able to cut through water in a swimming pool. This observation shows that the matter has space between them so that the particles can move from one place to another accommodate the body of the driver.

    1Thank You

    ANSWER

    • Posted by Roshani Pal 5 years, 3 months ago

    CBSE > Class 09 > Science
    • 1 answers

    Satakshi Mishra 5 years, 3 months ago

    Some objects float in water because they have less density than water whereas some objects sink in water because they have more density than water

    3Thank You

    ANSWER

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