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    • Posted by Ved Shah 7 years, 2 months ago

    CBSE > Class 09 > Science
    • 1 answers

    Yogita Ingle 7 years, 2 months ago

    Atomic number of silicon = 14

    Therefore number of electrons = 14

    Thus, electronic configuration of silicon is

    K  L  M 
     2  8  4


     

    2Thank You

    ANSWER

    • Posted by Akanksha Kumari 7 years, 2 months ago

    CBSE > Class 09 > Science
    • 1 answers

    Yogita Ingle 7 years, 2 months ago

    Congenital diseases: These diseases are present since birth.They are caused due to genetic abnormality or due to metabolic disorders or malfunctioning of any order.
    Acquired diseases :These diseases are those which develop after birth.
     They are of 2 types:
    1)Infectious or communicable: These diseases are caused by some biological agents or pathogens such as viruses,bacteria,protozoans,fungi etc. They are spread from one person to another by various physical contact such as air,water,food etc.
    2)Non-infectious or non-communicable: These diseases are not caused by any infectious agent. They are restricted only to those persons who are suffering from them.

    2Thank You

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    • Posted by Akanksha Kumari 7 years, 2 months ago

    CBSE > Class 09 > Science
    • 1 answers

    Meghna Thapar 6 years, 1 month ago

    Homeotherm (warm blooded) and Poikilotherm (cold blooded). 

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    • Posted by Alok Ranjan 7 years, 2 months ago

    CBSE > Class 09 > Science
    • 1 answers

    Akanksha Kumari 7 years, 2 months ago

    The difference between healthy and diseases free are: Healthy- it is the sate of complete physical,mental and social well being. * it depends upon the indivitual as well as social enviroment. * a healthy person will be disease free. Diseases free :- it is the state of absence of discomfort of any part of the body. * it is realeted to indivitual only * a diseases free person should be healthy or unhealthy.

    1Thank You

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    • Posted by Ariba Jahan 7 years, 2 months ago

    CBSE > Class 09 > Science
    • 2 answers

    Yogita Ingle 7 years, 2 months ago

    Many multiple echoes of a sound can be produced are called as reverberations.
    Reverberation is the phenomenon of overlapping of sound caused by multiple reflections. Reverberation causes the overlapping of several reflected waves. If the time gap between the reflected waves is so short that these cannot be distinguished. So we hear multiple noisy sounds.
    Example: reverberation of sound occurs in small cave almost the gap between the walls is approximately 17 m.

    1Thank You

    Aditya Kumar 7 years, 2 months ago

    The multipal of reflation of sound is called Reverberation

    2Thank You

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    • Posted by Umesh Kumar 7 years, 2 months ago

    CBSE > Class 09 > Science
    • 1 answers

    Aditya Rajpoott Rajpoot 7 years, 2 months ago

    No because there is no pain when we cut our hairs

    1Thank You

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    • Posted by Prem Singh 7 years, 2 months ago

    CBSE > Class 09 > Science
    • 1 answers

    Pooja Sharma 7 years, 2 months ago

    250km/h

    1Thank You

    ANSWER

    • Posted by Raj Singh 7 years, 2 months ago

    CBSE > Class 09 > Science
    • 3 answers

    Vishal Rajput 7 years, 2 months ago

    The most hardest part of our body is teeth which is made up of calcium

    1Thank You

    .Yogitha . Dhanaji 7 years, 2 months ago

    Porns

    0Thank You

    Amandeep Sehrawat 7 years, 2 months ago

    Bones

    0Thank You

    ANSWER

    • Posted by Abdul Faiz 7 years, 2 months ago

    CBSE > Class 09 > Science
    • 1 answers

    Aashi Sharma 7 years, 2 months ago

    The practice involved in farming to increase crop production

    0Thank You

    ANSWER

    • Posted by Divishi Verma 7 years, 2 months ago

    CBSE > Class 09 > Science
    • 1 answers

    Manani Chaudhary 7 years, 2 months ago

    It is relationships between two organisms in which both of them are benefited example of is fungi and blue green algae . Fungi get it's food from algae in return blue green algae gets shelter

    1Thank You

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    • Posted by Mahima Malviya 7 years, 2 months ago

    CBSE > Class 09 > Science
    • 2 answers

    Anita Mahala 7 years, 2 months ago

    During the process of precipitation water evaporates taking latent heat of vapourisation and hence causes cooling. Factors of evaporation are Surface area, humidity, sunlight, wind nature of liquid.

    1Thank You

    Shubham Sharma 7 years, 2 months ago

    What is eco

    0Thank You

    ANSWER

    • Posted by Jaishree Sanodiya 7 years, 2 months ago

    CBSE > Class 09 > Science
    • 1 answers

    Anita Mahala 7 years, 2 months ago

    No

    1Thank You

    ANSWER

    • Posted by Dhruv Granite 7 years, 2 months ago

    CBSE > Class 09 > Science
    • 1 answers

    Shubham Sharma 7 years, 2 months ago

    Eco

    1Thank You

    ANSWER

    • Posted by Mahima Malviya 7 years, 2 months ago

    CBSE > Class 09 > Science
    • 0 answers
    ANSWER

    • Posted by Rohit Kumar 7 years, 2 months ago

    CBSE > Class 09 > Science
    • 2 answers

    Sandhya Saini 7 years, 1 month ago

    R.H Whittaker

    0Thank You

    Kamlesh Singh 7 years, 2 months ago

    Whittaker

    0Thank You

    ANSWER

    • Posted by Krishna Rathod 7 years, 2 months ago

    CBSE > Class 09 > Science
    • 1 answers

    Kamlesh Singh 7 years, 2 months ago

    Xylem is water conducting tissue and phloem food conducting tissue

    1Thank You

    ANSWER

    • Posted by Shivam Jadhav 7 years, 2 months ago

    CBSE > Class 09 > Science
    • 2 answers

    Gifty Rajesh 7 years, 2 months ago

    Electronic configuration of oxugen = 2,6

    1Thank You

    Kamlesh Singh 7 years, 2 months ago

    -2

    0Thank You

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    • Posted by Anuj Anuj 7 years, 2 months ago

    CBSE > Class 09 > Science
    • 1 answers

    Ansh Singh 7 years, 2 months ago

    But the tyndal effect is a sccatering of light in a liquid

    1Thank You

    ANSWER

    • Posted by Krishna Rathod 7 years, 2 months ago

    CBSE > Class 09 > Science
    • 2 answers

    Amandeep Sehrawat 7 years, 2 months ago

    The xylem and the phloem make up the vascular tissue of a plant and transports water, sugars, and other important substances around a plant. ... Phloem is responsible for transporting food produced from photosynthesis from leaves to non-photosynthesizing parts of a plant such as roots and stems.

    0Thank You

    Ansh Singh 7 years, 2 months ago

    Xylem is know as the

    1Thank You

    ANSWER

    • Posted by Muskan Mehta 7 years, 2 months ago

    CBSE > Class 09 > Science
    • 1 answers

    Raj Dran 7 years, 2 months ago

    Storage of food is important to prevent attack of pests and insects Reduce in quantity ,quality of grains

    1Thank You

    ANSWER

    • Posted by Abhi Rocks 7 years, 2 months ago

    CBSE > Class 09 > Science
    • 2 answers

    Manani Chaudhary 7 years, 2 months ago

    Animals which are used for doing work is known as drought animals example donkey horse ox etc

    0Thank You

    Amandeep Sehrawat 7 years, 2 months ago

    The breed is essentially a good drought breed. This breed is found in the hill tracts of Darjeeling, Sikkim, and Bhutan.

    0Thank You

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    • Posted by Sahana M Sahana M 7 years, 2 months ago

    CBSE > Class 09 > Science
    • 3 answers

    Akanksha Kumari 7 years, 2 months ago

    because some pythogens enter in our body and our immune system is not able to fight from them since we fall ill

    0Thank You

    Rajesh A 7 years, 2 months ago

    We will not take nourishing food so our immune system may become weak we will be affected by disease so we fall ill

    1Thank You

    Sachit Shambharkar 7 years, 2 months ago

    Because of diseases.

    1Thank You

    ANSWER

    • Posted by Kaibalya Praharaj 7 years, 2 months ago

    CBSE > Class 09 > Science
    • 2 answers

    Drishti Tandon 7 years, 2 months ago

    We know that w=f*s Work is equal to potential energy According to newton's second law of motion, f=m*a So in w=f*s P.E. = m*a*s We know that a=g So, P.E. = m*g*s s=h (distance covered) This concludes that P.E. = m*g*h

    1Thank You

    Sudhir Rathi 7 years, 2 months ago

    W=force ×displacement mg×h W=mgh PE=mgh

    2Thank You

    ANSWER

    • Posted by Harikesh Singh 7 years, 2 months ago

    CBSE > Class 09 > Science
    • 2 answers

    Megha Awasthi 7 years, 2 months ago

    During evaporation process the particles of liquid gain energy from their surroundings in order to overcome the force of attraction between them. This causes loss of heat energy in the surroundings that is why evaporation cause cooling

    1Thank You

    Yogita Ingle 7 years, 2 months ago

    During evaporation process the particles of liquid gain energy from their surroundings in order to overcome the force of attraction between them. This causes loss of heat energy in the surroundings that is why evaporation causes cooling.

    2Thank You

    ANSWER

    • Posted by Kavita Yadav 7 years, 2 months ago

    CBSE > Class 09 > Science
    • 1 answers

    Sudhir Rathi 7 years, 2 months ago

    Female cockroach produce one egg in a week a after mating all cockroach develop by complete a life cycle consist of thrre stage :egg nymph and adult adult female produce 10 to 40 egg at a time

    1Thank You

    ANSWER

    • Posted by Suhail Khan 7 years, 2 months ago

    CBSE > Class 09 > Science
    • 2 answers

    Kamlesh Singh 7 years, 2 months ago

    Due to diffusion in has

    0Thank You

    Akanksha Kumari? 7 years, 2 months ago

    The particles of perfume mix up with air and spread in all directions. This phenomenon is known as diffusion. Thus we get the smell of perfume sitting several metres away.

    0Thank You

    ANSWER

    • Posted by Pan Shiv 7 years, 2 months ago

    CBSE > Class 09 > Science
    • 1 answers

    Ram Kushwah 7 years, 2 months ago

    E=1/2mv​​​​​2

    2Thank You

    ANSWER

    • Posted by Pawan Kumar 7 years, 2 months ago

    CBSE > Class 09 > Science
    • 0 answers
    ANSWER

    • Posted by Aman Parashar 7 years, 2 months ago

    CBSE > Class 09 > Science
    • 1 answers

    Yogita Ingle 7 years, 2 months ago

    • Permanent tissues are derivatives of meristematic tissue.
    • They are mature tissue and the cell have lost the capacity of cell division.
    • They may be living or dead.
    • The cell wall may be thick or thin.
    • The inter cellular spaces may be present or absent .

    2Thank You

    ANSWER

    • Posted by Riya Khandelwal 7 years, 2 months ago

    CBSE > Class 09 > Science
    • 1 answers

    Sneha Yadav 7 years, 2 months ago

    Tiger- Panthera tigris Peacock- Pavo cristatus Neem- Azadirachta indica Lotus- Nelumbo lucifera Potato-Solaum tuberosum

    0Thank You

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