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Ask QuestionPosted by Ashwin Jena 6 years, 5 months ago
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Aparna Mishra 6 years, 5 months ago
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Shashi Pandey 6 years, 5 months ago
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Debasmita Deb 6 years, 5 months ago
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Sia ? 6 years, 5 months ago
Flame is a hot glowing body of ignited gas that is generated by something on fire.
Posted by Rytham Kapoor 6 years, 5 months ago
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Posted by Khushi Chaudhary 6 years, 5 months ago
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Posted by Rytham Kapoor 6 years, 5 months ago
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Sia ? 6 years, 5 months ago
Measures to control noise pollution
1) We should not play radio ,stereo systems and televisions too loudly.
2) The horns of motor vehicles should not be gone unnecessarily.
3) The bursting of crackers should be avoided.
4) The noise making factory and airports should be shifted away from the residential area of the city.
5)loud speakers should be played at low volume during marriages and other social function.
6) Trees should be planted along the roads and around building to reduce the noise pollution from the roads.
Posted by Pradip Hardik 6 years, 5 months ago
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Sia ? 6 years, 5 months ago
Take a plastic bottle. Fix a small glass tube above the bottom of the plastic bottle. We should seal the joint of glass tube with plastic bottle by using molten wax so that water does not leak from the joint. Tie a thin sheet of rubber tightly on the open end of glass tube. Now fill half of plastic bottle with water. On filling water, the rubber sheet tied to the mouth of glass tube gets stretched and bulges out. The bulging out of rubber sheet tied to the glass tube fixed in the wall of plastic bottle demonstrates that water present in plastic bottle exerts pressure on the walls of the bottle. It is the sideways pressure exerted by water which inflates the thin rubber sheet forming a buldge. If we pour more water in the plastic bottle to increase depth, we will see that the bulge in the rubber sheet increases. This indicates that the pressure exerted by water increases with increasing depth.
- The pressure exerted by a liquid on the walls of container increases with increasing depth.
- A liquid exerts pressure on the walls of its container.
Posted by Khushi Yadav 6 years, 5 months ago
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Yogita Ingle 6 years, 5 months ago
These are made of small units that join together to form long chains. Some of the examples of synthetic fibres are nylon, rayon, acrylic, polyester etc.
Posted by Vivek Kumar 6 years, 5 months ago
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Yogita Ingle 6 years, 5 months ago
The amount of force exerted (thrust) on a surface per unit area is defined as ‘Pressure’. It can also be defined as the ratio of the force to the area .
Pressure (P) = Thrust/ Area
The SI unit is ‘pascals (Pa)’. 1 Pa = 1N/m2
Posted by Syed Zahoor Ahmad 6 years, 5 months ago
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Parthvi Tiwari 6 years, 5 months ago
Posted by Vandana Rana 6 years, 5 months ago
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Meghna Thapar 5 years, 10 months ago
Forces are due to an Interaction: An interaction of one object with another object results in a force between the two objects. At least two objects must interact for a force to come into play. Suppose a man is standing behind a stationary car. Since there is no interaction between the man and the car, no force acts on the car and hence the car does not move. Now, suppose the man begins to push the car, that is, he applies a force on it. The car may begin to move in the direction of the applied force due to interaction between the man and the car. Note that the man has to push the car to make it move.
Posted by Khusi Sweety 6 years, 5 months ago
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Yogita Ingle 6 years, 5 months ago
Polyester fabrics do not get wrinkled easily and it remains crisp and can be washed easily than any other fabrics. Thus it is used to make dress, shirts etc. PET is one of the familiar form of polyester that is used to make bottles, utensils, wires and many other things
Posted by Shivam Kumar 6 years, 5 months ago
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Yogita Ingle 6 years, 5 months ago
The halogens are the elements that form group 17 of the periodic table. They are reactive nonmetals and include fluorine, chlorine, bromine, and iodine.
Posted by Ganesan Ramachandran 6 years, 5 months ago
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Sia ? 6 years, 5 months ago
Various big or small actions make us feel the force. We hit or catch many objects in our daily life. We see that a moving ball stops on its own. The ball changes the direction of its motion when it is hit with a bat. We make lassi etc. by churning of curd. These are many actions which help us to feel that a force is exerted.
Posted by Rajat Rathi 6 years, 5 months ago
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Lokesh Rodha 6 years, 5 months ago
Mukesh Bharti 6 years, 5 months ago
Posted by Latha Narender 6 years, 5 months ago
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Dr B Venkatesulu Forensic Department 6 years, 5 months ago
Shivam Bhadouria 6 years, 5 months ago
Posted by Swati Thaware 6 years, 5 months ago
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Meghna Thapar 5 years, 10 months ago
Many chemical reactions take place in the cytoplasm to keep the cell alive
Posted by Aastha ? 6 years, 5 months ago
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Sia ? 6 years, 5 months ago
Curds are a dairy product produced by bacterial fermentation of milk. Bacteria that is used for this purpose is Lactobacillus delbrueckii . This is a kind of bacteria which can convert a sugar into an acid by means of fermentation. Milk contains a sugar called lactose, when milk is heated to a temperature of 30-40 °C and a small amount of old curd added to it, the lactobacillus in that curd sample starts to grow and convert the lactose into lactic acid, which imparts the sour taste to curd.
Posted by Meet Patel 6 years, 5 months ago
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Sia ? 6 years, 5 months ago
Check NCERT Solutions here : https://mycbseguide.com/ncert-solutions.html
Posted by Ashok Patel 6 years, 5 months ago
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Sia ? 6 years, 5 months ago
A fertiliser is an inorganic salt.Fertilisers are prepared in factories.they have all the three important plant nutrients nitrogen, phosphorous and potassium. They do not emit any bad smell but they cause alot of pollution.ex ammonium sulphate . A fertiliser does not provide any humus to the soil.
Manure is a natural substance obtained by the decomposition of cattle dung, human waste and plant residues. Manure is a natural product. it is prepared naturally in the field. And it mostly doesn't have the three important plant nutrients . Manure provides a lot of humus to the soil.
Posted by Rashi Sharma 6 years, 5 months ago
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Parthvi Tiwari 6 years, 5 months ago
Yogita Ingle 6 years, 5 months ago
Nitogen Fixation is a process in which nitrogen in the atmosphere is converted into ammonia.This atmospheric nitrogen does not easily combine with any other chemicals to form new compounds. So, the fixation process freeze nitrogen atoms from their triply bonded diatomic form.
Rashi Sharma 6 years, 5 months ago
Posted by Abhinav Raj 6 years, 5 months ago
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Sia ? 6 years, 5 months ago
The friction is generated between the shoes and the road. We press the ground and as a reaction the ground pushes us forward. The force of friction between sole and ground provides the necessary grip which pushes us forward.
Posted by Reshma Vijayan 6 years, 5 months ago
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Lalit Lalit 6 years, 5 months ago
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Keerti Tiwari 6 years, 5 months ago
Posted by Latika Kataria 6 years, 5 months ago
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Meghna Thapar 5 years, 10 months ago
Whether an object floats or sinks in water is determined by the ratio of its weight compared to its volume. If an object of a certain volume weighs more than an equal volume of water, it sinks because the water can’t hold it up. If an object weighs less than an equal volume of water, it floats because the water can support its weight.
This ratio between weight and volume is called density. An object that is less dense than water can be held up by water, and so it floats. An object that is more dense than water will sink. A piece of charcoal has less density than water so it floats whereas a piece of wood has more density than water so it sinks.
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Lawanya Chandrakar? 6 years, 5 months ago
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