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Ask QuestionPosted by Vishnu Bharti 5 years, 5 months ago
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Posted by Gursharan Kaur 5 years, 5 months ago
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Yogita Ingle 5 years, 5 months ago
August 1856, workmen who were quarrying for limestone in the Neander valley a gorge near the German city of Dusseldorf, found a skull and some skeletal fragments.
Posted by Har Har Mahadev 🙏 5 years, 5 months ago
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Har Har Mahadev 🙏 5 years, 5 months ago
Yogita Ingle 5 years, 5 months ago
The Graph plotted for the friction and the Force applied on it is attached in the attachment.
From the Attachment, We can see there is a small kink at the top which means after the static friction has been reached a maximum value with the increment in the force applied on it, there is a little decrease in the friction which is just the kink.
Also, we can see that the line is making an angle of 45° with the x-axis. After some time the Force of the friction become constant with the increase in force there is no effect of the Friction, since it became the constant.
Posted by Ishita Budhwar 5 years, 5 months ago
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Yogita Ingle 5 years, 5 months ago
Adrian is a painter from the south-western French city of Renne. After serving the lords for a long period, Adrian finally found a new job in the cathedral being constructed at Angers. He started his journey early morning for Angers. He seemed to be really happy, as he hoped that this work would help him end his life of exploitation by the lords.
Adrian was spellbound to see the enormous structure of the cathedral being built and the huge number of labourers working. Mr. Elodie, the head craftsman, explained the job to Adrian. He basically had to paint the church windows. In the evening, after a day’s hard work, Adrian received a gold coin as his wage.
Adrian is also a member of a guild. Every day, after his work is over, Adrian attends the guild’s meetings. Here, problems faced by the people of his profession are discussed. Adrian also gets the exposure of the job scenario in the town.
Posted by Bhagabati Bhatra 5 years, 5 months ago
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Yogita Ingle 5 years, 5 months ago
पानी के रात भर गिरने और प्राण-मन के घिरने में परस्पर संबंध कवि की बीती स्मृति और उससे होने वाली पीड़ा से है। पानी के लगातार बरसने के कारण कवि को अपने घर-परिवार के सदस्यों की याद आ गई। कवि को परिवार के सदस्यों के साथ बिताए गए खुशी के उन पलों की याद आ गई जो उसने कभी उनके साथ रहकर बिताएँ थे। इस कारण उसके प्राण व मन घर की याद में व्याकुल हो जाते हैं। इस तरह पानी के रात भर गिरने और प्राण-मन के घिरने की बात कवि की समृति के संदर्भ में की गई है।
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Posted by Nbam Ampi 5 years, 5 months ago
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Yogita Ingle 5 years, 5 months ago
The author's grandmother had many admirable qualities in her. She was strong, spiritual, kind, generous, and courageous. She was a very strong woman who could adapt herself to any new challenging situation. May be she derived that strength from her devotion to God. For example, at the village she single handedly looked after herself and the author. Her real strength came to light when she was called to the city. Her life underwent change; her relationship with the narrator was deeply affected. She became more lonely and forlorn. However, she accepted the changes stoically. When the narrator went abroad, she endured the five year long separation courageously. At the close of her life also, she took a very courageous decision of not talking to any of the family members. She felt she had omitted to pray to God; so she decided to give all her time to praying to God. All the above mentioned examples prove she was a strong lady.
Posted by Shubham Barhela 5 years, 5 months ago
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Har Har Mahadev 🙏 5 years, 5 months ago
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Vaishnavi Gupta 5 years, 5 months ago
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Yogita Ingle 5 years, 5 months ago
Torricelli’s law
- Torricelli law states that the speed of flow of fluid from an orifice is equal to the speed that it would attain if falling freely for a distance equal to the height of the free surface of the liquid above the orifice.
- Consider any vessel which has an orifice (slit)filled with some fluid.
- The fluid will start flowing through the slit and according to Torricelli law the speed with which the fluid will flow is equal to the speed with which a freely falling bodyattains such that the height from which the body falls is equal to the height of the slit from the free surface of the fluid.
- Let the distance between the free surface and the slit = h
- Velocity with which the fluid flows is equal to the velocity with which a freely falling body attains if it is falling from a height h.
Derivation of the Law:-
- Let A1= area of the slit (it is very small), v1= Velocity with which fluid is flowing out.
- A2=Area of the free surface of the fluid,v2=velocity of the fluid at the free surface.
- From Equation of Continuity, Av=constant.Therefore A1v1 = A2v2.
- From the figure, A2>>>A1, This implies v2<<v1(This meansfluid is at rest on the free surface), Therefore v2~ 0.
- Using Bernoulli’s equation,
- P+ (1/2) ρ v2+ρgh = constant.
- Applying Bernoulli’s equation at the slit:
- Pa+(1/2) ρ v12+ρgy1(Equation 1) where Pa=atmospheric pressure,y1=height of the slit from the base.
- Applying Bernoulli’s equation at the surface:
- P+ρgy2(Equation 2) where as v2=0 therefore (1/2) ρ v12=0, y2=height of the free surface from the base.
- By equating(1) and (2),
- Pa+ (1/2) ρ v12+ ρgy1= P+ρgy2
- (1/2) ρ v12 = (P-Pa) + ρg(y2-y1)
- =(P-Pa) ρgh (where h=(y2-y1))
- v12=2/ρ [(P-Pa) + ρgh]
- Therefore v1=√2/ρ [(P-Pa) + ρgh].This is the velocity by which the fluid will come out of the small slit.
- v1 is known as Speed of Efflux. This means the speed of the fluid outflow.
Torricelli’s law. The speed of efflux, v1,from the side of the container is given bythe application of Bernoulli’s equation.
Case1:- The vessel is not closed it is opento atmosphere that means P=Pa.
- Therefore v1=√2gh.This is the speed of a freely falling body.
- This is accordance to Torricelli’s law which states that the speed by which the fluid is flowing out of a small slit of a container is same as the velocity of a freely falling body.
- Case2:-Tank is not open to atmosphere but P>>Pa.
- Therefore 2gh is ignored as it is very very large, hence v1= √2P/ρ.
- The velocity with which the fluid will come out of the container is determined by the Pressure at the free surface of the fluid alone.
Posted by Royal Thakur? 5 years, 5 months ago
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Pk ⚔️ 5 years, 5 months ago
Yogita Ingle 5 years, 5 months ago
The reactant which reacts completely in the reaction is called limiting reactant or limiting reagent.
Let us consider the following reaction of formation of ammonia: 3H2 + N2 → 2NH3
In the reaction given above, 3 moles of Hydrogen gas are required to react with 1 mole of nitrogen gas to form 2 moles of ammonia. But what if, during the reaction, only 2 moles of hydrogen gas are available along with 1 mole of nitrogen.
In that case, the entire quantity of nitrogen cannot be used (because the entirety of nitrogen requires 3 moles of hydrogen gas to react). Hence, the hydrogen gas is limiting the reaction and is therefore called the limiting reagent for this reaction.
Anmol Dadhwal 5 years, 5 months ago
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Anmol Dadhwal 5 years, 5 months ago
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</a>Posted by Dhruv .. 5 years, 5 months ago
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Angela Magar 5 years, 5 months ago
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Yogita Ingle 5 years, 5 months ago
Discrete Variable
A discrete variable can take only certain values.Its value changes only by finite ‘jumps’. It jumps from one values to another but does not take any intermediate value between them.
For example, in number of students in class Xlth could be 1,2,4,10,11,15,20, etc.
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Ankit Kumar 5 years, 5 months ago
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Posted by Ruhi Sagar 4 years, 11 months ago
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Sia ? 4 years, 11 months ago
A quantity that has magnitude but no particular direction is described as scalar. A quantity that has magnitude and acts in a particular direction is described as vector.
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?Posted by Dhruv .. 5 years, 5 months ago
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Tec Om 5 years, 5 months ago
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