Steps of Construction :
(i) Draw a line segment AB = 8 cm.
(ii)    Draw a circle with centre A and radius 4 cm. Draw another circle with centre B and radius 3 cm.
(iii)    Let M be the mid-point of AB. Taking M as centre and AM as radius draw a circle which intersects the circles at P, Q, R and S.


Fig,
(iv) Join AP, AQ, BR and BS. These are required tangents.

A language of a country is the identity of that nation. M.Hamel, in his last lesson, tells his students about the beauty of their language, French, which is now being replaced by German because of the orders that have come from Berlin. He says that it is the most beautiful language in the world. He describes it as the clearest and the most logical of all the languages. The teacher elaborates the beauty of his county's language. He says that during colonial rule when the colonial power tries to enforce political and cultural dominance by imposing their own language if the natives are attached to their native language, their identity remains intact. They could say to have the key to their prison as long as they are holding fast with their language. These words of Mr. Hamel creates a sense of reverence in the hearts of the village elders, who have come to thank him for his forty years of faithful service, for their language and regretted not paying sincere attention towards it.

If France Sneezes rest of the europe catches cold" This Statement was said by austrian chancellor Duke Metternich He said this statement because LIberals in europe get inspired by the revolutions of liberals in France to overthrow Monarchy,Conservatism,&Aristocracy And Form their Elected constitution.

Valli did not want to make friends with the elderly woman because she found her absolutely repulsive. She saw that the woman had big holes in her ear lobes and very ugly earrings in them. She could smell the betel nut the woman was chewing, and could see the betel juice that was almost about to spill over her lips.

Cement is manufactured through a closely controlled chemical combination of calcium, silicon, aluminum, iron and other ingredients. Common materials used to manufacture cement include limestone, shells, and chalk or marl combined with shale, clay, slate, blast furnace slag, silica sand, and iron ore. The most important raw materials for making cement are limestone, clay and marl. These are extracted from quarries by blasting or by ripping using heavy machinery.

Hanna nursed the man herself. When he was getting ready to face some fearful eventuality she told him not to be afraid of anything. Then she knelt and fed him gently from the porcelain spoon. She also told him that he would be soon strong.

Two sharp contrasts between Belgium and Sri Lanka are
1)Sri Lankan government supported majority of sinhalese people and they made laws and job opportunities supporting Sri Lankan people they made tamils who were in less population feel inferior.
1)but Belgium government changed their constitution so many times and they gave equal representation to Dutch and French people.
2)tamils were protesting against Sri Lanka people and they liberated there party to fight with them which is LTTE and Sri Lanka government suppressed them and this led to serious war between both parties and tamils were killed and thrown out. this created heavy economic loss to Sri Lanka and their government took so much time to fill that damage
2) but in Belgium there was no chance for anything like this because their government took very careful steps that no one should feel inferior and all were equal central and state government representatives . everything was peaceful in Belgium.

The democratic system in Belgium is an ideal example of power sharing.It had accommodated the interests of its two main ethnic groups, that is, the Dutch and the French.The two groups have equal share in the working of government. To maintain political stability and unity, equal representation had to be provided to the two social groups. Both French and Dutch speaking ministers are in the central government. Many powers of the central government has also been distributed among the state governments of both French and Dutch speaking regions. Apart from this, a community government also exists which is elected by people belonging to one language community.Such an arrangement has prevented civil strife.But Sri Lankan democracy has followed majoritarian policies which gave preferences to the interests of the majority Sinhala community neglecting the Tamil minority.The interests of the Tamils were undermined which in the long run gave rise to civil war and political instability.

Charley goes down the steps to the first level. Then he walks down the second level. The suburban trains leave from there. Then he finds himself on the third level. He was convinced that he had reached the third level at Grand Central Station. He found it a different world of gas lights, brass spittoons, derby hats, beards, side bums and fancy moustaches.

Charley goes down the steps to the first level. Then he walks down the second level. The suburban trains leave from there. Then he finds himself on the third level. He was convinced that he had reached the third level at Grand Central Station. He found it a different world of gas lights, brass spittoons, derby hats, beards, side bums and fancy moustaches.

187.2 - 63.54 = 123.66

Rounding off to 4 significant digits,

Answer = 123.7

Answer:

Q and R

Explanation:

We are given that elements P,Q ,R and S have atomic numbers 11,15,17 and 18.

We have to find reactive non metals in given elements.

We know that atomic number of sodium=11

Therefore, P is sodium.

Sodium is metal not non metal

We know that atomic number of phosphorus,P=15

Therefore, Q is phosphorus.

It is no metal because it is required 3 electrons to complete their octet.

Atomic number of chlorine =17

Therefore, element R is chlorine.

It is non metal it required one electron to complete their octet.

Atomic number of argon=18

Therefore, element S is argon.

It is noble gas because it has full filled configuration .It is non reactive because it does not required any electron to complete their octet.

Hence, Q and R  are reactive non metals.

आज़ादी से पूर्व किसानों को निम्नलिखित समस्याओं का सामना करना पड़ता था।

• पूंजीपति तथा जमींदार किसानों के भोलेपन तथा अनपढ़ होने का फायदा उठाकर उनसे ज्यादा क़र्ज़ वसूलते थे।

• अंगूठा लगवाकर उनकी जमीन हड़प लिए थे।

• उनके कर्ज अदा न कर सकने पर वे किसानों के बेटों को बंधुआ मजदूर या जिंदगी भर अपना गुलाम बनाकर रखते थे।

• किसानों की बेटियों तथा पत्नी को बुरी नजर से देखते थे।

• इन सभी समस्याओं के अलावा गरीबी उनकी मुख्य समस्या थी।

• पुलिस का अत्याचार , अंग्रेज़ पुलिस भारतीय किसानों पर बहुत अत्याचार किया करते थे। बिना किसी कारण उन्हें जेल में डाल दिया करते थे।

• लगान की समस्या भी एक बड़ी समस्या थी।

In this lesson Roosevelt says “All we have to fear is fear itself.” Douglas has experienced both the sensation of dying and terror that fear of it can produce. The strong will, hard determination, courage and toil as well as honest labour win over all our terror and fears. The will to live brushes aside all our fears. In reality all our terrors and fears are psychological and the same can be won over.

https://mycbseguide.com/dashboard/content/19696

i) Molecular mass of H2= 2 x Atomic mass of H= 2 x 1
= 2 u

ii) Molecular mass of O2= 2 x Atomic mass of O
= 2 x 16
= 32 u

 iii) Molecular mass of NH3= Atomic mass of N + 3 x Atomic mass of H
= 14 + 3 x 1
= 17 u

The significance of the title, 'My Mother at Sixty Six' is that the author is noticing how old and worn out her mother is by life, and is fearful that she might not meet her mother again even though she does not dare to voice it

1. Climate change

Changes in climate throughout our planet's history have, of course, altered life on Earth in the long run — ecosystems have come and gone and species routinely go extinct.

2. Deforestation and habitat loss

3. Overexploitation

4. Invasive species

5. Pollution

A fibre is a thin thread of a natural or artificial substance, especially one that is used to make cloth or rope.
 Natural Fibres : Natural fibers are obtained from plants and animals. For example- cotton, jute, silk, etc.

Let ‘a’ be the first term and ’r’(≠) be the common ratio of the given G.P.The general teams of G.P. If S_n denotes the sum of ‘n’ terms, then,

S_n = a((1 - rⁿ)/(1 - r)) r ≠ 1

This can also written as

S_n = a((rⁿ - 1)/(r - 1))

Note: (1) S_n = a + ar + ar² +….. +ar^n-1 

(2) If r = 1, then Sn = a + a + a +……………+a – na 

(3) If r = 1, then formulas for S_n fail 

(4) If r < 1, then use  S_n = a((1 - rⁿ)/(1 - r))

(5) If r > 1, use  S_n = a((rⁿ - 1)/(r - 1))

(6) Sum of an infinite G.P.,a + ar + ar²  + ..... is a/(1 - r), - 1 r < 1

(7) If a, b, c are in G.P.then ‘b’ is the G.M. (geometric mean) between a and c, then b²  = ac ⇒ b = √ac

(8) If A and G are A.M. and G.M. of two given distinct positive real numbers, then relation between A and G is A > G.

Volume of the cuboid = 12 ×12 ×9 = 1296 cm².

Volume of the cube = 3³ = 27cm².

Let the number of cubes that can be cut from the cuboid be "n".

n × volume of cube = volume of cuboid

n = volume of cubic cuboid / volume of cube.

n = 1296 / 27

n = 48.

Therefore, 72 cubes can be cut out.