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    • Posted by Jyotirmayee Pradhan 5 years, 8 months ago

    CBSE > Class 08 > Science
    • 1 answers

    Utkarsh Bharadwaj 5 years, 8 months ago

    20 kg

    0Thank You

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    • Posted by Aditya Raj 5 years, 8 months ago

    CBSE > Class 08 > Science
    • 1 answers

    Meghna Thapar 5 years, 6 months ago

    Light is composed of photons, the photon is a massless particle.

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    • Posted by Prabhat Gupta 5 years, 8 months ago

    CBSE > Class 08 > Science
    • 1 answers

    Yogita Ingle 5 years, 8 months ago

    • Lightning can be explained in terms of charges produced due to rubbing. During a thunderstorm, the air currents move upwards and the water droplets move downwards. And this caused due to the separation of charge due to this vigorous motion.
    • As a result of this process, the positive charges collect near the upper edge and the negative charges accumulate near the lower edge of the cloud and also near the ground.
    • As the charge gets accumulated, its magnitude becomes very large. Water droplets in the air act as a conductor of this charge.
    • These charges flow to meet, thus producing strikes of lightning and thunder. For this phenomenon to occur, a sufficiently high electric potential between two regions and a high resistance medium must be present.

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    • Posted by Aakanksha Dubey 5 years, 8 months ago

    CBSE > Class 08 > Science
    • 1 answers

    Yogita Ingle 5 years, 8 months ago

    The angle of incidence will be 45 degree.
    We know that angle of incidence is always equal to the angle of reflection.
    As the angle of reflection + angle of incidence = 90°.
    Thus
    Angle of incidence = angle of reflection = 45°

     

    1Thank You

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    • Posted by Navneet Sangowaal 5 years, 8 months ago

    CBSE > Class 08 > Science
    • 1 answers

    Meghna Thapar 5 years, 5 months ago

    Earth formed around 4.54 billion years ago, approximately one-third the age of the universe, by accretion from the solar nebula. ... The Hadean eon represents the time before a reliable (fossil) record of life; it began with the formation of the planet and ended 4.0 billion years ago.

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    • Posted by Rauf Khan 5 years, 8 months ago

    CBSE > Class 08 > Science
    • 1 answers

    Meghna Thapar 5 years, 7 months ago

    As paper comes from wood pulp. Recycling of paper directly contributes to the conservation of forest. If we recycle paper, the need for paper will reduce; therefore less number of trees will be cut. Extreme use of paper leads to deforestation. Moreover, recycling paper needs 70% less energy than it takes to make new paper. It also saves used paper from occupying and piling up in landfills. Paper recycling is much more cost effective. It significantly reduces air and water pollution as it does not need to be disposed of, instead it is recycled.

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    • Posted by Rauf Khan 5 years, 8 months ago

    CBSE > Class 08 > Science
    • 1 answers

    Meghna Thapar 5 years, 7 months ago

    Paper is made from wood pulp that is produced from the wood of forest trees. Many trees are cut down to make paper and thus cause deforestation. So we should save paper to save trees. Recycling of paper means to process the waste paper so that it can be used again. Paper can be recycled from old magazines, newspapers, books and notebooks. Paper can be recycled five to seven times for use. We should save paper, reuse paper and recycle paper. By doing so, we can save trees, energy and water needed to manufacture paper. The amount of harmful chemicals used in making paper will also be reduced.

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    • Posted by Abhishek Sharma Sharma 5 years, 8 months ago

    CBSE > Class 08 > Science
    • 3 answers

    Aditya Raj 5 years, 8 months ago

    Force acting on a object

    0Thank You

    Pritam Biswas 5 years, 8 months ago

    An approximate measurement of friction

    1Thank You

    Pritam Biswas 5 years, 8 months ago

    An approximate measurements

    1Thank You

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    • Posted by Kunika Khandelwal 5 years, 8 months ago

    CBSE > Class 08 > Science
    • 1 answers

    Meghna Thapar 5 years, 7 months ago

    Jupiter is the fifth planet from the Sun and the largest planet of the Solar System. It is the oldest planet of the Solar System thus it was the first to take shape out of the remains of the solar nebula.Jupiter is also twice as massive as all the other planets combined, having 318 times the mass of Earth. The gas giant has a gravity of 24.79 m/s², a little more than twice of Earth. Its powerful gravity has been used to hurl spacecraft into the farthest regions of the solar system. Jupiter rotates once every 10 hours – A Jovian day – thus it has the shortest day of all the planets in the solar system. Jupiter does not have a solid surface being comprised mostly out of swirling gases and liquids such as 90% hydrogen, 10% helium – very similar to the sun. A very small fraction of the atmosphere is made up of compounds such as ammonia, sulfur, methane, and water vapor. Jupiter’s atmosphere is the largest planetary atmosphere in the solar system. It makes up almost the entire planet. It holds a unique place in the history of space exploration since after it was observed through the telescope, some of its moons were also discovered and because of this, their movements were observed thus ending the belief that everything orbited the Earth.

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    • Posted by Kunika Khandelwal 5 years, 8 months ago

    CBSE > Class 08 > Science
    • 1 answers

    Meghna Thapar 5 years, 7 months ago

    enus is the second planet from the Sun and the sixth largest.Since Venus is the brightest object in the sky after the Moon, and the Sun, it was given the name of the Roman goddess of beauty and love, the ancient Greek’s named it Aphrodite. In ancient times, Venus was taught as being two different objects in the sky: The Mourning Star and The Evening Star. In Mercury’s case, it was also mistakenly believed to be two different things. It is the only planet named after a female deity and it is the brightest planet in the Solar System.More than about 62 degrees hotter than Mercury, the closest planet to the sun. It was then concluded that Venus has the hottest surface out of all the planets and the hopes that it resembled Earth, were shattered. Its thick atmosphere traps heat in a runaway greenhouse effect greatly contributing to the planets high temperatures.

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    • Posted by Mehakpreet Kaur 5 years, 8 months ago

    CBSE > Class 08 > Science
    • 1 answers

    Mehakpreet Kaur 5 years, 8 months ago

    What is electroplating? Explain with the help to labeled diagram. Write any two uses of in daily life?

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    • Posted by Mili Kumari 5 years, 8 months ago

    CBSE > Class 08 > Science
    • 1 answers

    Meghna Thapar 5 years, 7 months ago

    This is because the Pole Star (i.e. Polaris, in the Northern hemisphere) is within a degree of the Earth's centre of rotation. That is, the north pole is in line with this particular star. Thus, as the Earth rotates, Polaris does not appear to move in the sky, and the rest of the stars appear to revolve around it.

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    • Posted by Ridhi Sharma 5 years, 8 months ago

    CBSE > Class 08 > Science
    • 4 answers

    Mili Kumari 5 years, 8 months ago

    The maximum extent of vibration of a vibrating body from its mean position is known as its amplitude

    0Thank You

    Remya Santhosh Remya 5 years, 8 months ago

    Amplitude is the distance travelled by vibration to vibrating body

    0Thank You

    Sunil Jyoti Chakma 5 years, 8 months ago

    Tyyu

    0Thank You

    Kundan Kumar 5 years, 8 months ago

    Amplitude is the distance traveled by vibration you vibrating body.

    2Thank You

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    • Posted by [email protected] B 5 years, 8 months ago

    CBSE > Class 08 > Science
    • 4 answers

    Tiasha Barai 5 years, 8 months ago

    Decrease friction

    1Thank You

    Jhanvi Pandey 5 years, 8 months ago

    B. Decrease friction

    2Thank You

    Nagamani P 5 years, 8 months ago

    Decrease

    2Thank You

    Sssssssssssssss Yyyyyyyyyyyyyyy 5 years, 8 months ago

    Decrease friction

    2Thank You

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    • Posted by Ankit Morya 5 years, 8 months ago

    CBSE > Class 08 > Science
    • 4 answers

    Ankit Kumar 5 years, 8 months ago

    Because sportsman buse shoe with spike cause friction

    1Thank You

    Satyam Krishna 5 years, 8 months ago

    To increase friction

    1Thank You

    Sssssssssssssss Yyyyyyyyyyyyyyy 5 years, 8 months ago

    To increase friction

    0Thank You

    Vinder Dass 5 years, 8 months ago

    To increAse friction and make grip on ground

    0Thank You

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    • Posted by Laxmi Sharma 5 years, 8 months ago

    CBSE > Class 08 > Science
    • 1 answers

    Remya Santhosh Remya 5 years, 8 months ago

    Micro organisms are harmful as if they enters our body we will fall sick

    1Thank You

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    • Posted by Ghanshyam Rattawa 5 years, 8 months ago

    CBSE > Class 08 > Science
    • 5 answers

    Remya Santhosh Remya 5 years, 8 months ago

    3 types of friction are there static friction rolling friction and sliding friction

    1Thank You

    Anitha Mattapally 5 years, 8 months ago

    Static friction,sliding friction,rolling friction

    1Thank You

    Pankaj Gupta 5 years, 8 months ago

    Static friction ,sliding friction and rolling friction

    0Thank You

    Hezal Garg 5 years, 8 months ago

    They are Static friction Sliding friction Rolling friction

    2Thank You

    Hezal Garg 5 years, 8 months ago

    There are three types of friction

    1Thank You

    ANSWER

    • Posted by Shiva Varad 5 years, 8 months ago

    CBSE > Class 08 > Science
    • 1 answers

    Manju Kumari 5 years, 8 months ago

    KEYWORDS ball bearing drag fluid fristion friction introlocking lubricants rolling friction sliding friction static friction

    1Thank You

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    • Posted by Usha A 5 years, 8 months ago

    CBSE > Class 08 > Science
    • 1 answers

    Vaigha Madathil 5 years, 8 months ago

    1)Pituary gland == growth hormones. 2) ovaries==estrogen. 3) testes== testosterone 4) pancreas==insulin 5) thyroid== thyroxine 6) adrenal glands== adrenalin

    2Thank You

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    • Posted by Rani Kumari 5 years, 8 months ago

    CBSE > Class 08 > Science
    • 2 answers

    Anjali Gujare 5 years, 8 months ago

    They ova are called as zygote

    0Thank You

    Remya Santhosh Remya 5 years, 8 months ago

    The fertilised egg is called as zygote

    1Thank You

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    • Posted by Prashant Reddy 5 years, 8 months ago

    CBSE > Class 08 > Science
    • 1 answers

    Meghna Thapar 5 years, 7 months ago

    The white sunlight splits and forms a broad patch of seven colours called spectrum. This splitting up of white light into seven colours on passing through a transparent medium like a glass prism is called dispersion of light.

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    • Posted by Md Zaid Ansari 5 years, 8 months ago

    CBSE > Class 08 > Science
    • 0 answers
    ANSWER

    • Posted by Shubham Kuchhal 5 years, 8 months ago

    CBSE > Class 08 > Science
    • 1 answers

    Mili Kumari 5 years, 8 months ago

    The band of colours obtained because of the dispersion of light is called a spectrum

    1Thank You

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    • Posted by Raunak Singh 5 years, 8 months ago

    CBSE > Class 08 > Science
    • 1 answers

    Meghna Thapar 5 years, 5 months ago

    Semen, also known as seminal fluid, is an organic fluid that contains spermatozoa. It is secreted by the gonads (sexual glands) and other sexual organs of male or hermaphroditic animals and can fertilize the female ovum

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    • Posted by R Vines 1M 5 years, 8 months ago

    CBSE > Class 08 > Science
    • 1 answers

    Yogita Ingle 5 years, 8 months ago

    The speed of sound refers to the distance travelled per unit time by a sound wave propagating through a medium. The speed of sound in air at 20oC is 343.2 m/s which translates to 1,236 km/h.

    The speed of light in vacuum is c = 3 x 108 m/s
     

    2Thank You

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    • Posted by Ashish Kumar 5 years, 8 months ago

    CBSE > Class 08 > Science
    • 1 answers

    Meghna Thapar 5 years, 5 months ago

    A minimum of 3 h of exposure to light is needed for induction. Light inhibits growth, glucose uptake and phosphoryl- ation but does not inhibit the uptake of lysine. The Ascomycetes and Fungi Imperfecti have received considerable attention, since exposure to light markedly affects asexual sporulation.

    0Thank You

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    • Posted by Ritesh Kumar 5 years, 8 months ago

    CBSE > Class 08 > Science
    • 1 answers

    Rishiraaj Das 5 years, 8 months ago

    Urea and potash

    1Thank You

    ANSWER

    • Posted by Prince ..... 5 years, 8 months ago

    CBSE > Class 08 > Science
    • 1 answers

    Meghna Thapar 5 years, 7 months ago

    Advantages of friction:

    1. We are able to walk on ground because friction between the sole of our shoes and ground prevents us from slipping over the ground.
    2. Friction between tyres of a car and the road enables a car to move forward on road without skidding.
    3. The brakes of a car or a bicycle work by friction.
    4. We are able to write and make drawings on paper because there is friction between the tip of pencil and paper.
    5. We can hold a glass tumbler in our hands because of friction between the glass tumbler and our hands.
    6. We are able to fix nails in a wall due to friction.

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    • Posted by Surekha Suryavanshi 5 years, 8 months ago

    CBSE > Class 08 > Science
    • 1 answers

    Yogita Ingle 5 years, 8 months ago

    The causes of friction are molecular adhesion, surface roughness and the ploughing effect. Every object has a rough surface, though the surface may appear to be smooth to the naked eye. But when we observe through a microscope, we find that the surfaces of all the objects have rough edges. Some of the particles on the surface of objects are in the form of tiny hills and valleys. When a body is pulled over another, these tiny hills and valleys present on both the surfaces in contact get entangled with one another.

    1Thank You

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    • Posted by Vibhanshu Verma 5 years, 5 months ago

    CBSE > Class 08 > Science
    • 2 answers

    Angel Gautam Av 2124 5 years, 8 months ago

    Lightning conductor os a device used to protect buildings from the effect of lightning . ??

    2Thank You

    Yogita Ingle 5 years, 8 months ago

    • It is a device used in building during construction to protect the buildings from the effect of lightning.
    • A metallic rod is erected along the walls of the building during construction such that the tip is protruding outwards at the top of the building.
    • The top end is in air and is not in touch with any metallic surface.
    • The other end is buried in the ground.
    • When a lightning strikes, this provides a direct path for the charges to discharge to the ground, thereby not affecting anybody.

    1Thank You

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