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Hello sanket and "Eid ke Chand"( Seraj bhai)???

Hii sanket bro

Whereas non-metals may be solid, liquid and gaseous at room temperature. Metals are good conductors of heat and electricity but non-metals are poor conductors of heat and electricity. Metals are ductile in nature i.e. it can be drawn into thin wires. ... Metals are malleable but non-metals are not malleable.

 

Property	Metals	Non-metals
1. Nature	Metals are electropositive in nature	Non-metals are electronegative in nature
2. STate	Metals are solid (except mercury)	Non-metals exist in all the three states, i.e., solid, liquid and gas.
3. Metallic	Metals are lustrous	Non-metals are non-lustorous. They cannot polished.
4. Ductility	Ductile	Non-ductile
5. Reaction with acids	Metals replaces hydrogen from acids and from salts.	Non-metals exits do not replace hydrogen from acids.
6. Reaction with oxygen in air	Metals forms basic oxides some of which to form alkalis.	Non-metals form acidic or neutral oxides.

4 ohm + 8ohm = 12 ohm. 1/12 ohm+ 1/12 ohm= 2/12 ohm= 1/6 => 6 ohm Ans

Hi

It's easy buddy, see first make to parallel line. One will have 4 and 8 ohm resistance and in bottom line it would be 12 ohm. Then You will get the desired resistance

5

Hi

@Abhinav If everybody will focus in studies then how anybody will be enjoy live life.

3

Please focus on studies

 samarth43 18.01.2018ScienceSecondary School +5 pts Answered What is corrosion? explain it advantage and disadvantages 2 SEE ANSWERS Log in to add comment Answers  siram   Ace Corrosion is the process of being corroded or damaged causing to the metals. disadvantages- 1.weakens the metal 2.loss of contamination and deterioration of appearance. advantages- 1.surface corrosion forms an oxide layer 4.3 147 votes THANKS 181 Comments  Report Surnia  Ambitious Corrosion is a process in which the chemically stable substance oxide, sulfide and hydroxide covers the metal. Explanation: The advantages of corrosion are as follows: 1. It provides a protective layer over the surface of metal which protects the inner metal from further destruction. 2. The galvanization takes the advantage of corrosion process by coating the another metal over the surface of the metal to make the metallic item new. The disadvantages of corrosion are as follows: 1. The metal particles are lost from the surface. 2. The physical appearance of the metallic object get changed. 3. This reduces the quality and value of the material in the market. 4. This reduces the life of the metallic objects.

Rusting of any iron surface,naturally

Surface corrosion forms an oxide layer which further protects the inner metal form corrosion. Corrosion prevents corrosion : Some metals like zinc are used as sacrificial anodes to prevent corrosion to other metal. ... The main disadvantages of corrosion of metal are: Lose of metal from the surface.

Corrosion is a natural process that converts a refined metal into a more chemically-stable form such as oxide, hydroxide, or sulfide. It is the gradual destruction of materials (usually a metal) by chemical and/or electrochemical reaction with their environment.

Advantages of corrosion:

1. Protection : Surface corrosion forms an oxide layer which further protects the inner metal form corrosion.
2. Corrosion prevents corrosion : Some metals like zinc are used as sacrificial anodes to prevent corrosion to other metal.
3. Galvanic corrosion : The principle on which primary batteries work.

The main disadvantages of corrosion of metal are:

1. Lose of metal from the surface.
2. Change in the physical appearance of a metal object.
3. Change in chemical properties of metal.
4. Lose of the efficiency of metallic machines.
5. A decrease in the life span of metallic objects.

Expert Answer:

 

X/2 + Y/3 = 2 → 3X + 2Y = 12.....(i)

X/3 + Y/2 = 13/6 → 2X + 3Y = 13....(ii)

Adding (i) and (ii) we get X = 2 

Subtracting (ii) from (i) we get Y = 3

1/x = 2 and 1/y = 3

x = 1/2 and y = 1/3

Give me the answer

Life processes chapter me se kuch delete nahi hua so u should read the whole chapter. Don't worry.

Here x₁ = -3, y₁ = 10, x₂ = 6, y₂ = -8  ......          [m(6) + n (-3)]/(m+n) , [m (-8) + n (10)]/(m+n) = (-1,6) .......         (6m - 3n)/(m+n), (-8m+10n)/(m+n) = (-1,6) .......  equating the coefficients of x and y.......     (6m-3n)/(m+n) = -1    .......   (-8m+10n)/(m+n) = 6...........        6m -  3n = -1 (m+n)............      6m - 3n = -1 (m+n)..........       6m-3n=-m-n..........       6m+m=-n+3n.........        7m=2n.. .........         m/n= 2/7.........         m:n = 2:7.......... So the point (-1,6) is dividing the line segment in the ratio 2:7.

Let P(-1, 6) divides the line segment joining the points A(-3, 10) and B(6, -8) in the ratio K : 1.
Then the co-ordinates of P are given by

Here, we have
x₁ = -3, y₁ = 10
x₂ = 6, y₂ = -8
and    m₁ = K, m₂ = 1
So, the co-ordinates of P are



But the co-ordinates of P are given as P(-1, 6)


Hence, required ratio = 2 : 7.

Magnesium ribbon must be cleaned before burning in air so that the layer of magnesium oxide (which is formed due to reaction of magnesium with air) can be removed in order to get the desired chemical reaction.

Magnesium ribbon should be cleaned with sandpaper before burning in the air because of the following reasons:

• Magnesium very reactive element which rapidly reacts with oxygen in the air to form a white layer of magnesium oxide and this layer will not burn.
• To remove the Magnesium oxide layer from the ribbon which may prevent or slow down the burning of
• magnesium ribbon.
• Unwanted impurities deposited on the magnesium ribbon can be removed and only pure magnesium can be used for the reaction.

Hydrogen is a nonmetal and is placed above group in the periodic table because it has ns1 electron configuration like the alkali metals. However, it varies greatly from the alkali metals as it forms cations (H+) more reluctantly than the other alkali metals

It is used as a reference element to compare reactivities of metals

Hydrogen is a nonmetal and is placed above group in the periodic table because it has ns¹ electron configuration like the alkali metals. However, it varies greatly from the alkali metals as it forms cations (H⁺) more reluctantly than the other alkali metals.

Stress management is beneficial to reduce blood pressure, heart disease, digestive troubles and many more physical ailments. It also helps improve sleep, mental health, cognition and libido. There are simply too many benefits to list them all. It is clear to see why stress management is so important. 

Thanks Shubham?

•  A belief in the essential rationally and goodness of man.
•  A belief in certain inalienable rights of the individual, particularly, the rights of life. liberty and property.
•  That state comes into existence by mutual consent for the purpose of protection of rights.

 

Individual rights, government by consent,

Ok

Hello mahi

Thanks everyone ???

Metalloids are those elements which behave both like metal and non-metal.

The elements which display properties of both metals and non-metals are classified as metalloids. In the Periodic Table, they separate metals from the non-metals.
 For eg. Silicon, Arsenic etc.

The elements which contain qualities of metal and non metal both is called mettaloid . Ex . Boron and sillicon

The heart is roughly triangular in shape. It has four compartments called chambers inside it. The upper two chambers of the heart are called atria and the lower two chambers are called ventricles. The atria receive blood from the two main veins. The left atrium is connected to the left ventricle through a valve V1 and the right atrium is connected to the right ventricle through another valve V2. These valves prevent the backflow of blood into atria when the ventricles contract to pump blood out of the heart to the rest of the body because when the ventricles contract, the valves V1 and V2 close automatically so that the blood may not go back into the atria. The job of heart is to pump blood around our body. All the atria and ventricles of the heart contract and relax at appropriate times and make the heart behave like a pump. A sheath of tissue called pericardium protects the muscular heart.

 

The function of human heart :-

* It is a four chambered structure consisting - the right auricle , the left auricle , right ventricle and left ventricle.

* The Auricles are smaller and placed above the ventricles. Auricles are partitioned by a muscular called septum.

* The right auricle receives the deoxygenated blood from all parts of the body except the lungs. It pumps this blood into the right ventricle. Then , the right ventricle pumps the deoxygenated blood to the lungs. The left auricle receives oxygenated blood from the lungs through pulmonary veins. It pumps this blood into the left ventricle. The left ventricle pumps the oxygenated blood to the distant organs in the body.

* Each auricle communicates with the ventricle of its side by a pore which is guarded by valves. These valves allow the blood to flow from the auricles to the ventricles but check its return to the auricles. Thus , the heart there is a complete separation of oxygenated and deoxygenated blood. The heart is enclosed in a double membrane called pericardium. It contains fluid which protects the heart from any shock or mechanical injury.

*The heart collects blood through both the auricles and then distributes it through ventricles. The action of heart includes contraction and relaxation of the auricles and ventricles.

* A contraction of heart is called systole and diastole. The contraction and relaxation occur in an automatic rhythmic fashion. The auricles and ventricles contract alternately. The rhythmic contraction and relaxation of heart is called a heart beat.

Let n = 2 Then sun of first 2 term of even number equal to even, 2 + 4 = 6 This shows that sum of nth term of even number is always even

available on this app..

Joule's law states the amount of heat production in a conductor is : Directly proportional to the square of electric current flowing through it. Is directly proportional to the resistance of the conductor. Directly proportional to the time for which electric current flows through the conductor. Joule's law of heating states that when a current 'i ' passes through a conductor of resistance 'r' for time 't' then the heat developed in the conductor is equal to the product of the square of the current, the resistance and time. H = i 2 rt. Electric arc and electric welding also work on the principle of heating effect of current. In some cases such as transformers and dynamos, Joule heating effect is undesirable. These devices are designed in such a way as to reduce the loss of energy due to heating.

When alkali (base) reacts with metal, it produces salt and hydrogen gas. Example: Sodium hydroxide gives hydrogen gas and sodium zincate when reacts with zinc metal. Sodium aluminate and hydrogen gas are formed when sodium hydroxide reacts with aluminium metal. The reaction of acids and bases with metals. In general, acids react with metals to give salt and release hydrogen gas. In general, bases do not react with metals and release hydrogen gas.

Thank you sisters

Surdas ke pad

अब तो उनके विरह सहने का सहारा भी उनसे छिन गया अर्थात अब श्री कृष्ण वापस लौटकर नहीं आने वाले हैं और इसी कारण अब उनकी प्रेम-भावना कभी संतुष्ट होने वाली नहीं है। उन्हें कृष्ण के रूप-सौंदर्य को दोबारा निहारने का मौका अब नहीं मिलेगा। उन्हें ऐसा प्रतीत हो रहा है कि अब वह हमेशा के लिए कृष्ण से बिछड़ चुकी हैं और किसी कारणवश गोपियों के अंदर जो धैर्य बसा हुआ था, अब वह टूट चुका है। इसी वजह से गोपियाँ वियोग में कह रही हैं कि श्री कृष्ण ने सारी लोक-मर्यादा का उल्लंघन किया है, उन्होंने हमें धोखा दिया है। (3) हमारैं हरि हारिल की लकरी। मन क्रम बचन नंद-नंदन उर, यह दृढ़ करि पकरी। जागत सोवत स्वप्न दिवस-निसि, कान्ह-कान्ह जक री। सुनत जोग लागत है ऐसौ, ज्यौं करुई ककरी। सु तौ ब्याधि हमकौ लै आए, देखी सुनी न करी। यह तौ ‘सूर’ तिनहिं लै सौंपौ, जिनके मन चकरी। सूरदास के पद का भावार्थ :- सूरदास जी के इन पदों में गोपियां उद्धव से यह कह रही हैं कि हमारे हृदय में श्री कृष्ण के प्रति अटूट प्रेम है, जो कि किसी योग-संदेश द्वारा कम होने वाला नहीं है। बल्कि इससे उनका प्रेम और भी दृढ़ हो जाएगा। गोपियाँ उद्धव से कह रही हैं कि जिस तरह हारिल (एक प्रकार का पक्षी) अपने पंजों में लकड़ी को बड़ी ही ढृढ़ता से पकड़े रहता है, उसे कहीं भी गिरने नहीं देता, उसी प्रकार हमने हरि (भगवान श्री कृष्ण) को अपने ह्रदय के प्रेम-रूपी पंजों से बड़ी ही ढृढ़ता से पकड़ा हुआ है। हमारे मन में दिन-रात केवल हरि ही बसते हैं। यहाँ तक कि हम सपने में भी हरि का नाम रटते रहते हैं और इसी वजह से हमें तुम्हारा यह योग संदेश किसी कड़वी ककड़ी की तरह लग रहा है। हमारे ऊपर तुम्हारे इस संदेश का कुछ असर होने वाला नहीं है। इसलिए हमें इस योग संदेश की कोई आवश्यकता नहीं है। फिर आगे गोपियाँ कहती हैं कि तुम यह संदेश उन्हें सुनाओ, जिनका मन पूरी तरह से कृष्ण की भक्ति में डूबा नहीं और शायद वे यह संदेश सुनकर विचलित हो जाएँ। पर हमारे ऊपर तुम्हारे इस संदेश का कोई असर नहीं पड़ने वाला है। (4) हरि हैं राजनीति पढ़ि आए। समुझी बात कहत मधुकर के, समाचार सब पाए। इक अति चतुर हुते पहिलैं ही, अब गुरु ग्रंथ पढ़ाए। बढ़ी बुद्धि जानी जो उनकी, जोग-सँदेस पठाए। ऊधौ भले लोग आगे के, पर हित डोलत धाए। अब अपनै मन फेर पाइहैं, चलत जु हुते चुराए। ते क्यौं अनीति करैं आपुन, जे और अनीति छुड़ाए। राज धरम तौ यहै ‘सूर’, जो प्रजा न जाहिं सताए। सूरदास के पद का भावार्थ :- प्रस्तुत पद में सूरदास जी ने हमें यह बताने का प्रयास किया है कि किस प्रकार गोपियाँ श्री कृष्ण के वियोग में खुद को दिलासा दे रही हैं। सूरदास गोपियों के माध्यम से कह रहे हैं कि श्री कृष्ण ने राजनीति का पाठ पढ़ लिया है। जो कि मधुकर (उद्धव) के द्वारा सब समाचार प्राप्त कर लेते हैं और उन्हीं को माध्यम बनाकर संदेश भी भेज देते हैं।

ऊधौ, तुम हौ अति बड़भागी। अपरस रहत सनेह तगा तैं, नाहिन मन अनुरागी। पुरइनि पात रहत जल भीतर, ता रस देह न दागी। ज्यौं जल माहँ तेल की गागरि, बूँद न ताकौं लागी। प्रीति-नदी मैं पाउँ न बोरयौ, दृष्टि न रूप परागी। ‘सूरदास’ अबला हम भोरी, गुर चाँटी ज्यौं पागी। सूरदास के पद का भावार्थ :- प्रस्तुत पंक्तियों में गोपियाँ उद्धव (श्री कृष्ण के सखा) से व्यंग करते हुए कह रही हैं कि तुम बड़े भाग्यवान हो, जो तुम अभी तक कृष्ण के प्रेम के चक्कर में नहीं पड़े। गोपियों के अनुसार उद्धव उस कमल के पत्ते के सामान हैं, जो हमेशा जल में रहकर भी उसमें डूबता नहीं है और न ही उसके दाग-धब्बों को खुद पर आने देता है। गोपियों ने फिर उद्धव की तुलना किसी तेल के मटके से की है, जो निरंतर जल में रहकर भी उस जल से खुद को अलग रखता है। यही कारण है कि गोपियाँ उद्धव को भाग्यशाली समझती हैं, जबकि वे खुद को अभागिन अबला नारी समझती हैं, क्योंकि वह बुरी तरह कृष्ण के प्रेम में पड़ चुकी हैं। उनके अनुसार श्री कृष्ण के साथ रहते हुए भी उद्धव ने कृष्ण के प्रेम-रूपी दरिया में कभी पाँव नहीं रखा और न ही कभी उनके रूप-सौंदर्य का दर्शन किया। जबकि गोपियाँ कृष्ण के प्रेम में इस तरह पड़ चुकी हैं, मानो जैसे गुड़ में चींटियाँ लिपटी हों। (2) मन की मन ही माँझ रही। कहिए जाइ कौन पै ऊधौ, नाहीं परत कही। अवधि अधार आस आवन की, तन मन बिथा सही। अब इन जोग सँदेसनि सुनि-सुनि, बिरहिनि बिरह दही। चाहति हुतीं गुहारि जितहिं तैं, उत तैं धार बही। ‘सूरदास’ अब धीर धरहिं क्यौं, मरजादा न लही। सूरदास के पद का भावार्थ :- गोपियाँ उद्धव से अपनी पीड़ा बताते हुए कह रही हैं कि श्री कृष्ण के गोकुल छोड़ कर चले जाने के उपरांत, उनके मन में स्थित कृष्ण के प्रति प्रेम-भावना मन में ही रह गई है। वे सिर्फ़ इसी आशा से अपने तन-मन की पीड़ा को सह रही थीं कि जब कृष्ण वापस लौटेंगे, तो वे अपने प्रेम को कृष्ण के समक्ष व्यक्त करेंगी और कृष्ण के प्रेम की भागीदार बनेंगी। परन्तु जब उन्हें कृष्ण का योग-संदेश मिला, जिसमे उन्हें पता चला कि वे अब लौटकर नहीं आएंगे, तो इस संदेश को सुनकर गोपियाँ टूट-सी गईं और उनकी विरह की व्यथा और बढ़ गई।

Question to pucho

-√(2/3),√(2/3) are zeroes of the given polynomial

Explanation:

Given Quadratic polynomial p(x) = 3x²-2

i) To find the zeroes of p(x),

we must take p(x)=0

3x²-2 = 0

=> 3x² = 2

=> x² = 2/3

=> x = ±√(2/3)

Verification:

Let m,n are two zeroes of the polyomial,

m = -√(2/√3)and n = √(2/3)

Compare p(x) with ax²+bx+c , we get

a = 3 , b = 0 , c=-2

i) sum of the zeroes =

= -√(2/3)+√(2/3)

= 0

= 

ii) Product of the zeros

= [-√(2/3)][√(2/3)]

= -2/3

=

Griffin was the lead character in the novel. He was an albino. Though he had many great qualities, yet he had many flaws in his character. Griffin was a man who had no conscience, was callous towards other people and simply self-centered. He appeared to be at war with the entire mankind. All his actions stemmed from his desire to save himself, with not a thought of care and sympathy for others. He did many mean acts in the novel. When he was short of money he continued his experiments, without any thoughts of the consequences, he robed his own father, who committed suicide because the money was not his. He attended his father’s funeral without feeling sorry for his own act; instead he blamed his father for being a sentimental fool. He experimented on a cat, with no concern for the poor creature’s cries of pain. He threw it out and never tried to find whether it was alive or dead. He burnt down the house at Great Portland Street when the landlord and his sons found about his experiments and were horrified. He was only worried about covering his trail.

Even after becoming invisible he committed one brutal act after another, not because they were necessary for his survival, but simply because he enjoyed doing them. The way he looted his owner of a small costume shop, and left after striking the old man on his head, spoke volumes about his inhumanity. He terrorized Marvel when he was on the run, fought with the policemen. His plan to spread reign of terror among people using his powers of invisibility really shocked Dr. Kemp. He even tried to kill him for betraying him. In his final run from the people hunting him, he killed an old man with a rod because he bumped into him.

In a combination reaction two or more substances combine to form a new substances

The reactants, A and B, combine to form a new single product, AB, which is always a compound. An example of a combination reaction is when hydrogen and chlorine react to form hydrochloric acid: The subscripts in the chemical reaction in this image refer to the states of matter. A combination reaction is a reaction in which two reactants combine to form one product. Oxygen and the halogens are very reactive elements and are likely to undergo combination reactions with other elements.

Laws of Chemical Combination

• Law of Conservation of Mass. It states that matter can neither be created nor destroyed.
• Law of Definite Proportions. It stated that a given compound always contains exactly the same proportion of elements by weight. ...
• Law of Multiple Proportions. ...
• Gay Lussac's Law of Gaseous Volumes. ...
• Avogadro Law.

The First World War created a new economic and political situation.
• It led to a huge increase in defence expenditure which was financed by war loans and increasing taxes
• customs duties were raised and income tax introduced.
• Through the war years prices increased - doubling between 1913 and 1918 - leading to extreme hardship for the common people.
• Villages were called upon to supply soldiers, and the forced recruitment in rural areas caused widespread anger.
• Then in 1918-19 and 1920-21, crops failed in many parts of India, resulting in acute shortages of food.
• This was accompanied by an influenza epidemic.
• According to the census of 1921, 12 to 13 million people perished as a result of famines and the epidemic.
• People hoped that their hardships would end after the war was over. But that did not happen.

 

The War created a new economic and political situation :
(i) It led to a huge increase in defence expenditure which was financed by war loans and increasing taxes, customs duties were raised, and income tax introduced.
(ii) Through the war years, prices increased – doubling between 1913 and 1918 – leading to extreme hardships for the common people.
(iii) Villagers were called upon to supply soldiers, and the forced recruitment in rural areas caused widespread anger.

(iv) The First World war gave a boost to the Indian industries. Since textile industries in Britain began to supply goods related to the War like uniforms, shoes and racksags, the Indian industries took advantage of the void and bagan to manufacture the cloth.  

Joule’s law of heating states that when a current ‘i ' passes through a conductor of resistance ‘r’ for time ‘t’ then the heat developed in the conductor is equal to the product of the square of the current, the resistance and time.

H = i ² rt

The reason behind the heat produced is the collision of the free electrons with the lattice ions or atoms while accelerating in presence of the external electric field.

we know that

volt= work done/ total charge or v = w/q

from this we get w= vq

we know that current i = q / t

so q = it

putting this in prev equation

we get w = vit

from ohms law v = ir

putting it in prev eq we get

w = irit = i²rt joule as work is stored as heat soH = I²RT Joules

The ionization energy of mercury is very high and the metallic bonds are very weak.
Hence, mercury is the only metal which is liquid at 0⁰C.

A Hypertext Markup Language was originally designed and developed in 1989 by researcher named Tim Berners Lee at CERN the European Physical Laboratory in Geneva, Switzerland. CERN researcher Angina developed the first world wide web program in 1990 and began releasing programs to Internet users in 1991.

 

This HTML is a subset of SGML (Standard Generalized Markup Language). This SGML was developed at IBM (International Business Machine) in 1986 to define markup language.

 

Now a days HTML has become very popular with its mechanisms for style sheets, scripting, frames, embedding objects, support of various directions to text, tables, frames.

NAPOLEON had brought revolutionary changes in the administrative field :

1. The Napoleon Civil Code of 1804 did away with all privileges based on birth and established equality before the law.
2. Secured the right of property.
3. Abolished the feudal system and freed peasants from serfdom and manorial dues.
4. Napoleon simplified administrative divisions;
5. In the towns, guild restrictions were removed.

The civil code of 1804 also known as the Napoleonic Code was enacted on March 21, 1804. It was one of the most important code of those times because institutionalised equalilty under law i.e. it ruled out privileges to people that were based on birth, allowed freedom of religion, and stated that only the most qualified would be entitled to government jobs. 

Question :  Who is the speaker in Stanzas 2, 4 and 6? Do you think this speaker is listening to the speaker in Stanzas 1, 3, 5, and 7?

Answer - The speaker in Stanzas 2, 4 and 6 is Amanda. No, she is not paying any attention to what her mother says. She is lost in her own thoughts. She imagines herself as a mermaid, an orphan and Rapunzel.