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Ask QuestionPosted by Muzammil Kapoor 5 years, 4 months ago
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Posted by Muzammil Kapoor 5 years, 4 months ago
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Posted by Shivanshu Verma 5 years, 4 months ago
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Meghna Thapar 5 years, 2 months ago
The brain, spinal cord and nerves are all composed of the nervous tissue. The cells of this tissue are called nerve cells or neurons.
The neuron consists of 3 parts:
- The Cyton or Cell body - It contains a central nucleus and cytoplasm with deeply stained particles called Nissl’s granules.
- Dendrites - The dendrons are short processes arising from the cyton and branches into dendrites.
- Axon - It is a single, long cylindrical process which forms fine branches terminally. It has a swollen structure at its end called synaptic knob or bouton. It is also termed as the nerve fibre.
Posted by Ragendu Br 5 years, 4 months ago
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Posted by Sowjanya Sundar 5 years, 4 months ago
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Posted by Pragati Karn 5 years, 4 months ago
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Yogita Ingle 5 years, 4 months ago
Procedure
- Fix a white sheet on a drawing board using drawing pins.
- Place the triangular prism resting on its triangular base. Using a pencil, draw the outline of the prism.
- Draw NEN normal to the face of the prism AB. make an angle between 30° and 60°.
- On the line PE, fix two pins at a distance of 5cm from each other and mark these as P and Q.
- Look for the images of the pins at P and Q through the other face of the prism AC.
- Fix two pins at R and S such that they appear as a straight line as that of the P and Q when it is viewed from AC face of the prism.
- Remove the pins and the prism.
- At point F, make the points R and S meet by extending them.
- PQE is the incident ray which is extended till it meets face AC. SRF is the emergent ray which is extended backward to meet at point G.
- Now mark the angle of incidence ∠i, angle of refraction ∠r and the angle of emergence ∠e and ∠D as shown in the experimental setup.
- Repeat the experiment for more angles between 30° and 60°.
Observations
- At surface AB, the light ray enters and bends towards the normal on refraction.
- At surface AC, the light ray bends away from the normal as it travels from one medium (glass) to the other (air).
- The angle of deviation is observed. Here, the emergent ray bends at an angle towards the direction of the incident ray.
Conclusion
- The incident ray bends towards the normal when it enters the prism and while leaving the prism it bends away from the normal.
- With the increase in the angle of incidence, the angle of deviation decreases. After attaining the minimum value, it increases with an increase in the angle of incidence.
Posted by Krazy Girl 5 years, 4 months ago
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Posted by Disha Agarwal 5 years, 4 months ago
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Sunidhi Singh 5 years, 4 months ago
Sunidhi Singh 5 years, 4 months ago
Posted by Charvi Sangwan 5 years, 4 months ago
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Posted by Harsha Bs 5 years, 4 months ago
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Yogita Ingle 5 years, 4 months ago
gram (g) and miligram (mg) is a very small unit of mass.
Posted by Anupama ?? 5 years, 4 months ago
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Rajnish Kalita 5 years, 4 months ago
Sushant Jindal 5 years, 4 months ago
Posted by Palak Gupta 5 years, 4 months ago
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Muskan Kumari 5 years, 4 months ago
Anupama ?? 5 years, 4 months ago
Posted by Uttam Kumar 5 years, 4 months ago
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Posted by Ishita Porwal 5 years, 4 months ago
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Yogita Ingle 5 years, 4 months ago
In order to change the pH from 3 to 6 you need to dilute the solution by adding water in it
As we can see that we are changing the pH by a factor of 3 that is we are diluting the solution by adding 1000 ml of water or you can say in general terms by diluting the solution 3 times.
Therefore in order to make the pH 6 you need to dilute the solution 3 times.
Posted by Vidyaranya Sharma 5 years, 4 months ago
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Gaurav Seth 5 years, 4 months ago
1. In humans, digestion of food takes place in the alimentary canal, made up of various organs and glands.
2. In the mouth, food is crushed into small particles through chewing and mixed with saliva, which contains amylase for digesting starch.
3. Food passes through the pharynx and oesophagus to reach the stomach. Gastric juice contains pepsin (for digesting proteins), HCl and mucus.
4. In the small intestine, carbohydrates, proteins and fats are completely digested into glucose, amino acids, fatty acids and glycerol.
5. The villi of the small intestine absorb the digested food and supply it to every cell of the body.
6. The undigested food is removed from the body through the ****.
Posted by Gaurav Kumar 5 years, 4 months ago
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Charvi Sangwan 5 years, 4 months ago
Anupama ?? 5 years, 4 months ago
Posted by Muzammil Kapoor 5 years, 4 months ago
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Anupama ?? 5 years, 4 months ago
Posted by Sunidhi Singh 5 years, 4 months ago
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Ankita Sah 5 years, 4 months ago
Gaurav Seth 5 years, 4 months ago
When an electrical appliance consumes electrical energy at the rate of 1 joule per second, its power is said to be 1 watt.
1 watt = 1 volt x 1 ampere
Posted by Sunidhi Singh 5 years, 4 months ago
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Posted by Sunidhi Singh 5 years, 4 months ago
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Gaurav Seth 5 years, 4 months ago
Quantization of charge implies that charge can assume only certain discrete values. That is to say the observed value of electric charge (q) of a particle will be integral multiples of (e) 1.6×10−19 coulombs.
i.e.
q=ne where n=0,1,2,.... (both positive and negative integers)
The charge cannot assume any value between the integers.
Posted by Jaat Shab 5 years, 4 months ago
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Gaurav Seth 5 years, 4 months ago
i) The acid which completely dissociates in water will be strong acid and the acid which is partially dissociated in water will be weak acid.
Weak acid - A, Strong acid - B
ii) Weak acids - CH3COOH (Acetic acid), HCOOH (Formic acid) citric Acid, Malic Acid, Tartaric Acid.
Strong acids - HCl (Hydro chloric acid), HNO3 (Nitric Acid)
H2SO4 (Sulphuric Acid ), H3PO4 (Phospharic acid)
Posted by Natasha Behera 5 years, 4 months ago
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Anupama ?? 5 years, 4 months ago
Posted by Shreyas Hs 5 years, 4 months ago
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Anupama ?? 5 years, 4 months ago
Gaurav Seth 5 years, 4 months ago
Q. What is the Universe ?
A n s w e r. A galaxy is a huge system of billions of stars, and clouds of dust and gases. Millions of such galaxies make up the universe.
Posted by Pulkit Kumawat 5 years, 4 months ago
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Gaurav Seth 5 years, 4 months ago
Copper does not react with dilute acids in normal condition because copper lies at lower position in reactivity series and is considered as a noble metal.
So, if copper turning is taken in place of zinc granules, no reaction will take place.
Posted by Pradeep Yadav 5 years, 4 months ago
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Priyansh Soni 5 years, 4 months ago
Gaurav Seth 5 years, 4 months ago
Pepsinogen is a digestive enzyme that helps in the digestion of proteins. Enzyme pepsinogen is converted to pepsin and then the proteins are converted into amino acids. The hydrochloric acid secreted in the stomach activates the pepsinogen enzyme required to digest proteins.
Posted by Pradeep Yadav 5 years, 4 months ago
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Gaurav Seth 5 years, 4 months ago
The first person to write a scientific account of electric effects was Sir William Gilbert(1504-1603). Gilbert's experiments led to a number of investigations by many pioneers in the development of electricity technology over the next 350 years.
He put forward the name electrica for substances like amber (yellow resinous substance found on the shores of the Baltic sea) which when suitably rubbed attracts light bodies.
It is the ancient Greeks who have observed that amber when rubbed with wool acquires a property that attracts light objects to it.
It is Thales of Miletus whose scientific inquisitivenss is said to have known amber and its property.(600 BC)
An American scientist Benjamin Franklin is known as the father of electricity(1706-1790).He performed the experiment of flying kite during a thunderstorm which led to the finding that lighting ang electricity is related which led to the invention of lightening rods.
Later in 1800, Italian-born physicist Alessandro Volta constructed the voltaic pile,
later known as the electric battery, the first device to produce a steady electric current.He found that certain chemical reactions could produce electricity.
The credit for generating electric current on a practical scale goes to the famous English scientist, Michael Faraday.He found out that electricity could be produced through magnetism by motion.
Thomas Alva Edison invented the practical incandescent light bulb
Posted by ? .. 5 years, 4 months ago
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Gaurav Seth 5 years, 4 months ago
Waste disposal means removing, discarding, recycling or destroying unwanted materials called waste that is produced from agriculture, domestic usage or industrial products. Following the correct methods for waste disposal will ensure lesser pollution and hazards for the environment. Proper waste management is necessary with steps involving proper collection of waste and scientific treatments that may contribute less to water pollution, soil pollution and air pollution.
Wastes can be of numerous types and much of the waste generated today is non-biodegradable waste. Globalization and industrialization have contributed to this hugely. The dumps with harmful substances in the waste can release toxic fumes and smoke. Therefore, the correct disposal for the particular kind of wastes is necessary, for example burning all kinds of wastes may lead to the above problem and cause harm to bodies. Also, dumping into rivers and filling land depressions without proper administration is not encouraged. Wastes including plastics, batteries, sanitary and oil products should be properly disposed of. Doing so may result in a hazardous environment and polluted atmosphere.
Methods of Waste Disposal
The various methods of waste disposal known are as follows:
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Landfill
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Incineration
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Biogas Generation
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Composting
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Waste compaction
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Vermicomposting
Posted by Sunita Sunnu 5 years, 4 months ago
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Anupama ?? 5 years, 4 months ago
Ishita Porwal 5 years, 4 months ago
Aman Sharma 5 years, 4 months ago
Posted by Gaurav Mishra 5 years, 4 months ago
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Gaurav Seth 5 years, 4 months ago
Micropropagation is the artificial process of producing plants vegetatively through tissue culture or cell culture techniques. In this artificial process of propagation, plants are produced invitro by asexual means of reproduction or by vegetative propagation.
Plants can be produced both asexually i.e, via vegetative parts’ multiplication or sexually i.e., seed production. One of the means of asexual reproduction is by multiplying genetic replicas of plants that are referred to as clonal propagation wherein plants can be populated from a single individual through asexual means of reproduction.
For the in vivo propagation of specific plants, asexual reproduction via multiplication of vegetative parts is the only resort since they do not generate functional seeds as seen in figs, grapes, bananas etc. Successful application of clonal propagation to the following is observed: potato, apple and many other ornamental plants.
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Vaibhav Sharma 5 years, 4 months ago
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