The poem, Dust of Snow by Robert Frost, reiterates that the little things in life can make huge changes in our future. It also shows that if we can take the hard times of life in stride, eventually something will happen to change our situation into happier times. The simple things we do for others can make all the difference. Just think about those random acts of kindness we do and how much they brighten a person’s day and sometimes change their future. 
Noticing and appreciating all the small things in life will make our life happier. It will also cause us to have a spirit that is willing to change and therefore succeed.

The poet is upset and sitting under the hemlock tree. Suddenly a crow sitting on the tree shakes the tree and the fine particles of snow from tree falls on the poet.  The soft and cold touch of snow changes the poet’s mood from sad to happy. He starts feeling soothed and refresh. In this way a simple moment proves to be very significant and saves rest of the day of poet from being wasted and held in regret. 
The black crow is commonly a symbol of death and fear.
Since the crow is not associated with goodness, it is ironic that in this poem, it is doing a good deed by shaking off the snow.
Robert Frost didn’t choose to use an oak, maple or pine tree. No, instead he chose the hemlock tree which is usually associated with poison and toxicity. Anyway, the beautiful snow that adorns the poisonous hemlock tree’s branches is shaken off by a scary crow.
Robert Frost uses the elements of the fearsome crow and poisonous Hemlock tree to do something good – shake the white, pure snow off the branches. This good act lifts the suicidal person’s spirits causing him to change his mind about killing himself. The small act causes the man to have an enlightened insight.
We have a poisonous Hemlock tree covered in pure, white snow and a man who is depressed, planning to kill himself and walking under the tree. At that precise moment, the black crow of death shakes the pure, good snow onto the man. All that goodness helps the man to change his mind about killing himself. Instead, he decides to live, forget the regret and sorrow to enable healing.

• A precipitation reaction is a reaction in which an insoluble salt is formed. It is formed by the combination of two solutions that contain soluble salts.
• The insoluble salt that emerges out from the solution is termed to be precipitate.
• For example, the precipitate Silver Chloride is formed when Aqueous silver nitrate (AgNO3) is added to a solution containing potassium chloride (KCl).

Electric potential is the work done per unit charge in bringing the charge from infinity to that point against electrostatic force.

In a conductor, electrons flow only when there is a difference in electric pressure at its ends. This is also called potential difference. 

Triangle ABC is Isosceles

and it is given

AC = BC

AB² = 2 AC²

= AC² + AC²

AC = BC so we can write,

AB² = BC² + AC²

This is similar to Pythagoras Theorem

AB = hypotenuse

BC = Perpendicular or Base

AC = Base or Perpendicular

Therefore

C = 90°

Molecular movements are very necessary to provide the different kinds of Molecules through the entire body of the organism for maintaining and repairing the structure of the organism body.

Diffusion is the essentially the movement of molecules from the region to region in biology the movement of molecules throughout the body of the Organism is no dad is known as diffusion.

पंजाब और केरल के कुछ तुलनात्मक आँकड़े:

में उपर्युक्त कथन से किसी सीमा तक सीमित हूँ- 
(i) निसंदेह पंजाब की तुलना में केरल की प्रति व्यक्ति आय इस तालिका में दिए गए आँकड़ों के अनुसार कम है, लेकिन आय आँकड़ें जैसे की वर्ष 2002 में प्रति एक हज़ार शिशु मृत्यु दर केरल में मात्र 11 है तो उसी समय में पंजाब में यह दर काफी ऊँची अर्थात् 49 है जो केरल में अच्छी स्वास्थ्य सेवाएँ उपलब्धि का प्रतीक हैं।
(ii) इसी तरह साक्षरता दर प्रतिशत 2001 में केरल में 91 हैं तो पंजाब में उससे काफी निम्न हैं जो कि मात्र 70 हैं। यह केरल में उच्च साक्षरता या अच्छी शिक्षा सुविधाओं कि उपलब्धि का प्रतीक हैं।  
(iii) प्राथमिक शिक्षा में छात्रों की उपस्थिति की दृष्टि से केरल की स्थिति पंजाब की अपेक्षा बेहतर है। पंजाब में 1995-96 में केवल अनुपात 81 छात्रों का है तो केरल में यह अनुपात 91 है। 

Solenoid is coil having n number of turns of insulated copper wire. Magnetic field lines are produced around the solenoid when a current is passed through it. The magnetic field produced by it is similar to the magnetic field of a bar magnet. The field lines produced in a current-carrying solenoid is shown in the following figure.

When the north pole of a bar magnet is brought near to the end connected to the negative terminal of the battery, then the solenoid repels the bar magnet. It means the end of solenoid which is connected to the negative terminal of the battery behaves as north pole as like poles repel each other similarly the other and behaves as a south pole.

Given equations are ,

10/( x + y ) + 2/( x - y ) = 4 ---( 1 )

15/( x + y ) - 5/( x - y ) = -2 --( 2 )

Let ,

1/(x+y) = a , 1/(x-y) = b

10a + 2b = 4

Divide each term with 2 , we get

5a + b = 2

=> b = 2 - 5a ----( 3 )

15a - 5b = -2 -----( 4 )

Substitute b = 2 - 5a in equation

( 4 ) , we get

15a - 5( 2 - 5a ) = -2

=> 15a - 10 + 25a = -2

=> 40a = -2 + 10

=> 40a = 8

=> a = 8/40

=> a = 1/5

Put a = 1/5 in equation ( 3 ) , we

get

b = 2 - 5 × 1/5

=> b = 2 - 1

b = 1

Therefore ,

1/( x + y ) = 1/5 => x + y = 5 --( 5 )

1/(x-y) = 1/1 => x - y = 1 ---( 6 )

Add equations ( 5 ) and ( 6 ) ,

We get

2x = 6

=> x = 6/2 = 3 ,

Put x = 3 in equation ( 5 ) , we get

3 + y = 5

=> y = 5 - 3 = 2

Therefore ,

x = 3 , y = 2

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Q. Where was lencho 's house located ?

A n s w e r :

Lencho's house was located on the crest of a low hill. One could see the river and the ripe corn fields. The flowers of the ripe corns were promising a good harvest that year.

श्रीलंका में तमिलों के बीच अलगाव की भावना पैदा करने वाले कारक निम्नानुसार थे:
(i) सिंहल सरकार के प्रमुख उपायों जैसे सिंहली को आधिकारिक भाषा बनाना और विश्वविद्यालय पदों और सरकारी नौकरियों के लिए सिंहल आवेदकों का पक्ष लेना धीरे-धीरे श्रीलंकाई तमिलों के बीच अलगाव की भावना को बढ़ाता है।
(ii) उन्होंने महसूस किया कि संविधान और सरकार की नीतियों ने उन्हें समान राजनीतिक अधिकारों से वंचित कर दिया और उन्हें नौकरी और अन्य अवसर प्राप्त करने में भेदभाव किया।
(iii) उन्होंने महसूस किया कि बौद्ध सिंहल नेताओं के नेतृत्व वाले प्रमुख राजनीतिक दल अपनी भाषा और संस्कृति के प्रति संवेदनशील नहीं थे।

Sri-lanka Tamils felt alientsd because:

(i) In 1956, an Act was passed to recognise Sinhala as the only official language, thus disregarding Tamil.

(ii) The governments followed preferential policies that favoured Sinhala applicants for positions in educational institutions, armed forces and other government jobs.

(iii) A new constitution declared that the state shall protect and promote Buddhism, the religion of the majority Sinhala community.

All these government measures gradually increased the feeling of alienation among the Sri Lankan Tamils.

Ohm’s Law states that the potential difference between two points is directly proportional to the electric current.

This means; potential difference V varies as electric current.

Or, V∝IV∝I

Or, VI=RVI=R-----------(1)

Or, 1I=RV1I=RV

Or, I=VRI=VR----------(2)

Or, V=RIV=RI ----------(3)

Where R is constant for the given conductor at a given temperature and called resistance. Resistance is the property of conductor which resists the flow of electric current through it.

OHM’s Law

OHM’s law states that under no same temperature, electric current flowing through an ideal conductor is directly proportional to the potential difference across its ends.

V ∝ I

V = IR, R – Resistance

• Resistance is a property of conductor to resist flow of charge through it. Its SI unit is Ohm (Ω).

R = V/I, 1 Ohm = 1 Volt/ 1 Ampere

• I = V/R denotes that Current is inversely proportional to Resistance. Hence, greater the resistance lesser will be the flow of current and vice-versa.
• A rheostat or a variable resistor is a device or a component which allows changing of resistance in a circuit keeping the voltage same.
• In a conductor, electrons are attracted by the atoms. This is a resistive force which is lower for a good conductor but very high for an insulator. A conductor having some resistance is called a Resistor.

Albert Einstein was a German-born theoretical physicist who developed the theory of relativity, one of the two pillars of modern physics. His work is also known for its influence on the philosophy of science

The angle of a quadrilateral are in Arithmetic Progression, now as there are four angles, the greatest of all the angles is double to that of smallest angles. Then to find the 4 angles of the quadrilateral,  the angles can be written as (x-3d)(x-d)(x+d)(x+3d)

The common difference in A.P. = d

Therefore, the sum of the four angles should be equal to that of 360°

Hence, (x-3d)+(x-d)+(x+d)+(x+3d)=360°

4x=360°

x=90°

Let (x+3d) be more than (x-3d)

Putting x = 90 degree in the equation x+3d = 2 (x-3d)

Then, 90+3d = 2 (90-3d)

9d=90;d=10

Hence, the common difference is 10

Therefore putting the value of  x=90° and  d=10 in (x-3d)+(x-d)+(x+d)+(x+3d)=360°

The angles are 60, 80, 100, and 120 of the quadrilateral. which are in AP.

If a line is drawn parallel to one side of a triangle and it intersects the other two sides at two distinct points then it divides the two sides in the same ratio. Given : In ∆ABC , DE || BC and intersects AB in D and AC in E. ... between the same || lines. The intercept theorem, also known as Thales' theorem (not to be confused with another theorem with the same name) or basic proportionality theorem, is about ratios of various line segments that are created if two intersecting lines are intercepted by a pair of parallels.

Sodium carbonate IS PREPARED BY by Solvay Process

Sodium carbonate is prepared by passing carbon dioxide through ammonia that gives ammonium carbonate. Subsequently ammonium carbonate is converted to ammonium hydrogen carbonate that reacts with sodium chloride to precipitate out sodium hydrogen carbonate. Sodium hydrogen carbonate later forms sodium carbonate.

2NH₃  + H₂O + CO₂    (NH₄)₂CO₃

(NH₄)₂CO₃  +  H₂O + CO₂   2NH₄HCO₃

2NH₄HCO₃   + NaCl    NH₄Cl + NaHCO₃

 2NaHCO₃ Na₂CO₃ + CO₂ + H₂O

Possession is all about control: if you have possession of something, you own it, or have your hands on it. If your house keys are in your possession, you know where they are. In soccer being in possession means having control of the ball; in hockey, it's having your stick on the puck. In the world of possessions' means people like to possess all sorts of things in the world. Money is external because it can buy only material objects; it cannot buy everything that one loses.

Since the ovary of female release one egg every month, therefore, the uterus also prepares every month to receive a fertilised egg. The inner lining of the uterus becomes soft and thick with lots of blood capillaries in it. This preparation is necessary as in case the egg is fertilised by the sperm, it helps to keep the egg and nourish it. If however, the egg is not fertilised, then the thick lining of the uterus is not required and the uterus lining breaks down and comes out through the ****** in the form of blood and mucous. This is called menstruation.
(b) Menstruation cycle in females:
(i) When a girl reaches puberty at the age of 10 – 12 years, the *** hormones released it her blood cause some of the ova in the ovaries to become mature.
(ii) Usually one mature egg is released from the ovary into the oviduct once every 28 days. This is called ovulation.

(iii) Before ovulation, the inner lining of the uterus becomes thick and spongy, and full of blood capillaries, and prepares itself to receive the fertilised egg.
(iv) If the ovum does not get fertilised, then the thick and soft inner lining of the uterus is no longer needed and hence it breaks and the dead ovum comes out from ****** in the form of bleeding called menstruation.
(v) Menstruation usually occurs 14 days after ovulation and usually lasts for 3 to 5 days.
(vi) After menstruation is over, the inner lining of the uterus starts building up again so that it becomes ready to receive the next ovum in case it gets fertilised.
(vii) If the ovum does not get fertilised even now, then the menstruation takes place again and this cycle goes on repeating.

GoDaddy is used as a web host and domain registrar. What that means is when people want to buy a domain name they can go to GoDaddy and purchase it. After they purchase the domain name they can host their website with the service.

GoDaddy is used as a web host and domain registrar. What that means is when people want to buy a domain name they can go to GoDaddy and purchase it. After they purchase the domain name they can host their website with the service.

Within the lungs, the passage divides into smaller and smaller tubes which finally terminate in balloon-like structures which are called alveoli. The alveoli provide a surface where the exchange of gases can take place. The walls of the alveoli contain an extensive network of blood-vessels. When we breathe in, the ribs are lift up and the diaphragm flattens which increases the size of the chest cavity. Because of this, air is sucked into the lungs and fills the expanded alveoli. The blood brings carbon dioxide from the rest of the body for release into the alveoli, and the oxygen in the alveolar air is taken up by blood in the alveolar blood vessels to be transported to all the cells in the body. During the breathing cycle, when air is taken in and let out, the lungs always contain a residual volume of air so that there is sufficient time for oxygen to be absorbed and for the carbon dioxide to be released.

(i) The alveoli are thin walled and richly supplied with a network of blood capillaries to facilitate the exchange of gases between blood and the air filled in alveoli.
(ii) Alveoli have balloon - like structures with thin elastic walls. These provide maximum surface for exchange gases.

Given, sum of first m terms of an A.P. is n.

Also, sum of first n terms is m.

Subtracting (2) from (1),

Hence, the sum of its first (m + n) terms is -(m + n).

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Let us assume that 4-5√2 is be rational.

=> 4-5√2 = a/b [ where, a,b belongs to Z]

=> -5√2 = a/b -4

=> √2 = 4/5 -a/b

L.H.S = irrational number as √2 is an irrational number .

R.H.S = rational number

Hence, R.H.S ≠ L.H.S

Therefore, our assumption is wrong & 4-5√2 is an irrational number.