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    • Posted by Ayush Sharma 5 years, 7 months ago

    CBSE > Class 09 > Science
    • 1 answers

    Meghna Thapar 5 years, 7 months ago

    A concave lens is a lens that possesses at least one surface that curves inwards. It is a diverging lens, meaning that it spreads out light rays that have been refracted through it. A concave lens is thinner at its centre than at its edges, and is used to correct short-sightedness (myopia).

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    • Posted by Kartikey Sharma 5 years, 7 months ago

    CBSE > Class 09 > Science
    • 2 answers

    Sagar Yadav 5 years, 7 months ago

    Because it is caused by the viruses not the bactaria

    0Thank You

    Best Devil Clasher 5 years, 7 months ago

    Using of condom on strawberry flavour?????

    1Thank You

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    • Posted by Sunita Sharma 5 years, 7 months ago

    CBSE > Class 09 > Science
    • 1 answers

    Meghna Thapar 5 years, 7 months ago

    A compound is a pure substance composed of two or more elements combined chemically in a fixed proportion by mass. Water is made up of hydrogen and oxygen in a fixed proportion. A compound is formed when two or more elements combine chemically by accepting, donating or by sharing electrons. Water is formed when an Hydrogen ion (H+) combines with an hydroxide ion(OH-).

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    • Posted by Ganishkha Mogilineedi 5 years, 7 months ago

    CBSE > Class 09 > Science
    • 2 answers

    Tripti Singh 5 years, 7 months ago

    It is total work done by total time taken

    0Thank You

    Mohammed Mansoor 5 years, 7 months ago

    Average power is define as work done/ time taken

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    • Posted by Ganishkha Mogilineedi 5 years, 7 months ago

    CBSE > Class 09 > Science
    • 1 answers

    Ganishkha Mogilineedi 5 years, 7 months ago

    It failed to explain how positive and negative charges are arranged in an atom so close yo each other.

    2Thank You

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    • Posted by Ganishkha Mogilineedi 5 years, 7 months ago

    CBSE > Class 09 > Science
    • 0 answers
    ANSWER

    • Posted by Sarfaraz Khan 5 years, 7 months ago

    CBSE > Class 09 > Science
    • 3 answers

    Lillima Amit 5 years, 7 months ago

    Mass does not change from place to place hence it will remain 1 kg at any place

    0Thank You

    Kartikey Sharma 5 years, 7 months ago

    10kg

    0Thank You

    Gaurav Kumar 5 years, 7 months ago

    1kg

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    • Posted by Mansi Class12 5 years, 7 months ago

    CBSE > Class 09 > Science
    • 3 answers

    Akshat Rai 5 years, 7 months ago

    Ozone layer is called ozone umbrella because it covers our earth in a shpe like umbrella and protect us from the ultravoilate rays of the sun

    1Thank You

    Ganishkha Mogilineedi 5 years, 7 months ago

    1)Ozone is a triayomic gas with a molecular formula O3 which is present in the upper reaches of the atmosphere (in the stratosphere region). 2)Elemental oxygen is normally found in the form of a diatomic moleculs.

    1Thank You

    Sunita Sharma 5 years, 7 months ago

    Because it protects the earth from harmful ultra violent rays.

    1Thank You

    ANSWER

    • Posted by Jagmohan Singh 5 years, 7 months ago

    CBSE > Class 09 > Science
    • 1 answers

    Mansi Class12 5 years, 7 months ago

    Vitamin K deficiencies in newborns are associated with vitamin K deficiency bleeding or VKDB (also known as hemorrhagic disease of the newborn). This can cause excessive bleeding and bruising and, in severe cases, can lead to fatal bleeding into the brain.

    1Thank You

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    • Posted by Aaditya Agrawal 5 years, 7 months ago

    CBSE > Class 09 > Science
    • 0 answers
    ANSWER

    • Posted by Umesh Sahu 5 years, 7 months ago

    CBSE > Class 09 > Science
    • 5 answers

    Sunita Sharma 5 years, 7 months ago

    Blood is fluid because it has a fluid matrix plasma . It is a connective tissue as because it transports salts ,protien , hormones , gases

    1Thank You

    Sejal Jaiswal 5 years, 7 months ago

    Blood has a fluid matrix called plasma , in which RBCs,WBCs and PLATELETS are suspended.The plasma contains proteins, salts,hormones.Blood flows and transport gases digested food.hormones and waste materials to different parts of the body that's wgy blood is called connective tissue

    1Thank You

    Sudhanshu Kumar 5 years, 7 months ago

    Blood is liquid so it is called fluid. Though it connects whole body so connective. Hence it is tissue. So it is called fluid connective tissue.

    1Thank You

    New Generation Kids 5 years, 7 months ago

    it is liquid in nature

    1Thank You

    New Generation Kids 5 years, 7 months ago

    tmkg

    1Thank You

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    • Posted by Umesh Sahu 5 years, 7 months ago

    CBSE > Class 09 > Science
    • 1 answers

    Meghna Thapar 5 years, 7 months ago

    Connective tissue is the binding and supporting tissue of the animal body. Matrix forms the main bulk of this tissue. The cells are loosely spaced and less in number. The matrix may be jelly like, fluid, dense or rigid. Blood is a fluid connective tissue. It is composed of plasma, platelets, red blood cells and white blood cells. It plays a significant role in the process of transportation of substances within the body.

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    • Posted by Mini Pawar 5 years, 7 months ago

    CBSE > Class 09 > Science
    • 1 answers

    Akshat Rai 5 years, 7 months ago

    Na2OH

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    • Posted by Rounak Anand 5 years, 7 months ago

    CBSE > Class 09 > Science
    • 0 answers
    ANSWER

    • Posted by Omkar Rajwade 5 years, 7 months ago

    CBSE > Class 09 > Science
    • 4 answers

    Sunita Sharma 5 years, 7 months ago

    2, 8,18,2

    2Thank You

    Iqbal Ahmad 5 years, 7 months ago

    2,8,18,2

    2Thank You

    Takshi Shukla 5 years, 7 months ago

    2,8,18,2

    2Thank You

    Anurag Yadav 5 years, 7 months ago

    2,8,18,2

    2Thank You

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    • Posted by Shubham Rohilla 5 years, 7 months ago

    CBSE > Class 09 > Science
    • 1 answers

    Yogita Ingle 5 years, 7 months ago

    Healthy

    Disease Free

    A state of complete physical, mental and social well being

    		 State of the absence of discomfort in any part of the body

    It depends upon the individual as well as on social and environmental factors

    It depends on the individual only
    A healthy person will be disease-free

    A disease-free person may or may not be healthy
    A healthy person is energetic and is able to perform as per the requirement

    The performance of a disease-free person depends upon the environment and personal attitude

    1Thank You

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    • Posted by Bhawanjot Kaur 5 years, 7 months ago

    CBSE > Class 09 > Science
    • 4 answers

    Sunita Sharma 5 years, 7 months ago

    Albert Einstein was a German-born theoretical physicist who developed the theory of relativity, one of the two pillars of modern physics. His work is also known for its influence on the philosophy of science.

    1Thank You

    Iqbal Ahmad 5 years, 7 months ago

    Albert Einstein

    0Thank You

    Yogita Ingle 5 years, 7 months ago

    Albert Einstein is known as the father of modern physics. He was a 20th-century scientist, who came up with the most important ideas. One of the important work of Albert Einstein is the theory of relativity and the famous equation E=mc2.

    0Thank You

    Anurag Yadav 5 years, 7 months ago

    Albert Einstein

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    • Posted by Shraddha Singh 5 years, 7 months ago

    CBSE > Class 09 > Science
    • 1 answers

    Anurag Yadav 5 years, 7 months ago

    Chemical formula of baking soda is - NaHCO3

    1Thank You

    ANSWER

    • Posted by Harveen Johal 5 years, 7 months ago

    CBSE > Class 09 > Science
    • 2 answers

    Yogita Ingle 5 years, 7 months ago

    The number of electrons, protons and neutrons makes atoms of one element different from the other.

    The properties of an element are decided by the number of electrons. Different elements have different number of electrons so they differ from each other.

    0Thank You

    Anurag Yadav 5 years, 7 months ago

    The number of electron , proton and neutron makes an atom of one element differ from atom of another element

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    • Posted by Lillima Amit 5 years, 7 months ago

    CBSE > Class 09 > Science
    • 1 answers

    Meghna Thapar 5 years, 2 months ago

    One of the most well known effects of ultrasound is that as Ultrasound waves pass through a tissue they tend to heat it up. ... Although Ultrasound cannot be heard by humans, at high decibels it can still cause direct damage to human ears. Ultrasound in excess of 120 decibels may cause Hearing damage. Ultrasound is nothing but sound waves with frequencies higher than the upper audible limit of human hearing. Ultrasound is no different from 'normal' (audible) sound in its physical properties, except in that humans cannot hear it. ... Hence, Ultrasound which has a range of above 20 kHz (20,000 Hz) can't be heard.

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    • Posted by Lillima Amit 5 years, 7 months ago

    CBSE > Class 09 > Science
    • 1 answers

    Yogita Ingle 5 years, 7 months ago

    Ultrasounds can be used to detect cracks and flaws in metal blocks. Ultrasonic waves are allowed to pass through the metal block and detectors are used to detect the transmitted waves. If there is even a small defect, the ultrasound gets reflected back indicating the presence of the flaw or defect. But, infrasound have low frequecy and they can't penetrate into the metal to detect the cracks.

    1Thank You

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    • Posted by Amrita Kumari 5 years, 7 months ago

    CBSE > Class 09 > Science
    • 2 answers

    Gaurav Kumar 5 years, 7 months ago

    1. Measure in density distance graph. 2. It's travel in all three medium (solid,liquid and gaas). 3. It travel in form of consecutive compression and rarefraction. 4. It travel parallel to the wave

    0Thank You

    Iqbal Ahmad 5 years, 7 months ago

    The longitudinal wave which move along the direction of the propagation of wave

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    • Posted by Prabhjot Kaur 5 years, 7 months ago

    CBSE > Class 09 > Science
    • 0 answers
    ANSWER

    • Posted by Abhinav Kumar 5 years, 7 months ago

    CBSE > Class 09 > Science
    • 0 answers
    ANSWER

    • Posted by Arjav Nayak 5 years, 7 months ago

    CBSE > Class 09 > Science
    • 3 answers

    Sahbaz Alam 5 years, 7 months ago

    It is easy to study and classification

    1Thank You

    Rony Saha 5 years, 7 months ago

    There are millions of spices on this earth for anybody it is impossible to study about each of their in his lifetime classification makes it easy in study the organism

    2Thank You

    Abhinav Kumar 5 years, 7 months ago

    There are number of living organisms on earth.There are in such a number that anyone isn't be able to study them one by one even in his/her whole life.So, common characteristics of all organisms are taken and studied together.

    2Thank You

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    • Posted by Karishma Kauskik 5 years, 7 months ago

    CBSE > Class 09 > Science
    • 3 answers

    Rudransh Mishra 5 years, 7 months ago

    Surname of the scienctist Neil Bohr who discovered the K,L,M,N shell (structure of atom )

    2Thank You

    Prakhar Mishra 5 years, 7 months ago

    Neil bohr

    1Thank You

    Rahul Joshi 5 years, 7 months ago

    It is the surname of a scientist name Neils bohr.

    2Thank You

    ANSWER

    • Posted by Ujjawal Kumawat 5 years, 7 months ago

    CBSE > Class 09 > Science
    • 1 answers

    Lillima Amit 5 years, 7 months ago

    Find the measurement of time ,initial velocity and final velocity from graph snd use the formula of acceleration =v-u/t,where v is final velocity and u is initial velocity and t is time .

    1Thank You

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    • Posted by Naina Choudhary. 5 years, 7 months ago

    CBSE > Class 09 > Science
    • 7 answers

    Amaan Khan Khan 5 years, 7 months ago

    A molecule which has two atoms

    0Thank You

    Amaan Khan Khan 5 years, 7 months ago

    A molecule which has only one type of atom is knowm as monoatomic.

    0Thank You

    Rony Saha 5 years, 7 months ago

    Number of atom in a element like h2 is diatomic because it has two atom and potassium in tetra atomic

    0Thank You

    Bhumi Agarwal 5 years, 7 months ago

    It is the number of atoms present in a molecule . If there is one atom it is monoatomic , if there are two atoms then it is diatomic and so on..

    1Thank You

    Abhinav Kumar 5 years, 7 months ago

    These are the type of molecules according to number of atoms present in them.Such as monoatomic means one atom is present in that molecule and diatomic means two atoms are present in that molecule.

    1Thank You

    Prakhar Mishra 5 years, 7 months ago

    1,2,3,4

    0Thank You

    Satyam Prajapati 5 years, 7 months ago

    means1 ,2,3,4

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    • Posted by Naina Choudhary. 5 years, 7 months ago

    CBSE > Class 09 > Science
    • 1 answers

    Mansi Class12 5 years, 7 months ago

    Mass number = No. of protons + No. of neutrons So, Mass number of X = 6 + 6 = 12 Mass number of Y = 6 + 8 = 14 Thus, the mass number of X is 12 and that of Y is 14. Now , X contains 6 protons, therefore, the atomic number of X is 6. Y contains 6 protons, therefore, the atomic number of Y is also 6. Since X and Y have the same atomic number (of 6) but different mass numbers (of 12 and 14) , they are a pair of isotopes. Atomic number 6 is of carbon element. So, both X and Y represent carbon element.

    1Thank You

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    • Posted by Rajesh Mandal 5 years, 7 months ago

    CBSE > Class 09 > Science
    • 1 answers

    Prakhar Singh 5 years, 7 months ago

    Work means kam but work done means an object must be displaced from its original position.Thats why work is scaler but work done is vector

    2Thank You

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