Students and Teacher's Forum

Lanthanides and actinides are called inner transition elements because they are a group of elements that are shown as the bottom two rows of the periodic table.Lanthanides and actinides belong to the .....

9. What will happen to living things if there is no air?

If there would be no air so all the living thing that are surviving they would suddenly die. If there would be no oxygen,carbon-dioxide so the plants can't do the respiration process and the photosynthesis process .....

10. 2cos8a+1÷2cosa+1=(2cosa-1 )(2cos2a-1)(2cos4a-1)

We have given, (2cosa -1)(2cos2a-1)(2cos4a-1)=(2cos8a+1)÷(2cosa+1) or,(2cosa+1) (2cosa -1)(2cos2a-1)(2cos4a-1)=(2cos8a+1) Now, LHS = (2cosa+1) (2cosa .....

11. Verb agreement

Subject-verb agreement is the art of making sure that sentence parts agree with one another so that your subjects and verbs match up. Singular subject takes a singular verb. Eg: She drives a car. He writes an essay on his .....

12. Why subject verb agreement is important?

Subject-verb agreement is the art of making sure that sentence parts agree with one another so that your subjects and verbs match .....

13. यदि तिमी भाग्य कथाको पुन्टे भएको भए तिमी के गथ्र्यौ ?

हामीले आफ्नो भाग्य श्रम र जमिनबीचको सम्बन्धलाई बुझेर श्रमको मूल्य स्थापित गर्न .....

14. तलका प्रश्नको उत्तर लेख्नुहोस् :
क) कविले कवितामा माला उन्ने प्रसङ्ग किन उल्लेख गरेका हुन् ?
ख) सहिष्णुताको यात्रा सुरु गर्न ध्यान दिनुपर्ने पक्ष के के हुन् ?
ग) एकताको यात्रा कविले कहाँबाट कसरी सुरु गर्न भनेका छन् ?

क) कविले कवितामा माला उन्ने प्रसङ्ग किन उल्लेख गरेका हुन् ? उत्तर दुवुस .....

15. 'Right decision taken at the right time is the key to success.' Justify.

Obviously, the right decision at the right time holds the key to success. It helps an individual to address the problem correctly with the knowledge and information before it becomes complicated. We know that every individual wants to be .....

16. In the adjoining figure, ∠m = ∠n, prove that ∠p = ∠q.

Here, m + p = 180o .............(i) [ Since, linear pairs.] n + q = 180o .............(ii) [ Since, linear .....

17. Place of worship of hinduism

Places of worship for Hindus are called .....

18. Into how many ways can chemical reactions take place?

2. Decomposition Reactions: a single compound undergoes a reaction that produces two or more singular substances .....

19. Find the perimeter of rectangle
length(l)=8m, breafth(b)=90cm

Here, Length (l) = 8 m = 8 ⨯100cm = 800cm Breadth (b) = 90cm Perimeter = ? We know, Perimeter of rectangle = 2(l + b) .....

20. Do you think the effort to improve the HDI are sufficient or not? Write your observation in a sentence

According to the letest HDI report, Nepal holds 144th position in HDI rank. The HDI value of Nepal is 0.558. This means Nepal belongs to the countries of Medium Human Development. But still Nepal has to do a lot to stand alongside .....

21. Simplify:
5a^3-20a, a^3-3a^2-10a,a^3-a^2-2a+8

Here, First expression = 5a3 - 20a = 5a(a2 - 4) = 5a(a2 - 22) = 5a (a-2) (a+2) Second expression: = a3 - 3a2 -10a = a(a2 - 3a - 10) = a( a2 - (5-2)a -10) = a( a2 - 5a + 2a -10) = .....

22. The present age of mother is four times the age of daughter. If the age of daughter after 10 years is equal to age of the mother before 20years ,find present age of mother and daughter

Let the present age of the mother be 'm' and the present age of the daughter be 'd' . According to the question, m = 4d, After 10 years, d + 10 = m - 20 or, m - d = 20 + 10 or, 4d - d = .....

23. Short notes on smoke pollution

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24. The government of nepal has been hiking the price of petroleum products from time to time suggest two ways how hiking the price of petroleum products helps in pushing the problems of energy crisis further in the future

Of course, the price of pertroleum product has been rising alarmingly. Following steps should be taken to solve the problem of energy crisis. - the government should take control of such products - people involved in such activities should be .....

25. Simplify:
b)3.7 ×3.7-1.3×1.33.7-1.3

d) 4.8 ×4.8×4.8+2.4 ×2.4 ×2.44.82-4.8×2.4+ 2.42

d) (4.8 x 4.8 x 4.8 + 2.4 x 2.4 x 2.4)/(4.82 - 4.8 x 2.4 + 2.42) = (4.83 + 2.4 3)/(4.82 - 4.8 x 2.4 + 2.42) = (4.8 + 2.4)(4.82 - 4.8 x 2.4 + 2.42)/(4.82 - 4.8 x 2.4 + 2.42) .....

26. Write a short essay on: "The English language is better than native languages".

English is the third most widely spoken language in the world, after Chinese and Spanish. The globalization of the world has made the English language the most important language in the world. In the modern world, .....

27. What are the spectrums of sustainable development as defined by the UNESCO?

Sustainable development is the development activities carried out by the present generation without destroying the ability of the future generation to meet their need their way. Human activities consume the natural resources. But if the resources .....

28. Define baise and chaiubisi state.

Chaubisi Rajya were sovereign and small kingdoms. They were ruled by Khas Rajputs, and were located around the Gandaki River Basin.

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29. नेपालिमा बताउनु होस
the velocity of a body described relative to a reference point भनेको के हो ,त्यस्लाइ नेपालिमा प्रस्तसगं बुझउनु होस

Your question seems to be the definition of relative motion; सापेक्ष गति. Please write the full sentence so that we will explain to you in detail in Nepali as .....

30. Relative velocity भनेको के हो ।

The velocity of a body A as seen by an observer B which is also moving is known as the relative velocity of A with respect to B. If you are traveling in the same direction, then your relative .....

31. Why is haemoglobin necessary?

Hemoglobin is essential for transferring oxygen in your blood from the lungs to the tissues. Hemoglobin is an important component of red blood cells. A person with reduced levels of hemoglobin may benefit from eating more .....

32. Name the place of worship of the.Following religions. 1 islam 2 sikhism 3 judaism 4 christianity

The places of worship .....

33. Write any one characterstic of a neighbour.

Neighbours are the people who live near to us. We share our happiness each other. They help us in our problems. They may keep our property if we are away from home. One major character of a neighbour is "Sharing and .....

34. Change the following
a. 40km into centimeter
b. 5liter into cubicmeter

We know, 1 km = 1000 m or, 1 m = 100 cm or, 1 km = 100000 cm ∴ 40 km = 4000000 .....

35. A man sells a mobile set for rs. 5994 at the loss of 7.5%. How much money has he paid to buy a mobile? Also find his loss amount.

Here, SP = Rs.5994 Loss% = 7.5% CP = ? Loss amount = ? We know, SP = CP - Loss% Of CP or, 5994 = CP - 7.5/100 x CP or, 5994 = (100CP - 7.5CP)/100 or, 5994 x 100 = 92.5 CP or, CP = 5994 x .....

36. ‘मेरो गाउँघर’ शीर्षकमा कविता लेख्नुहोस् ।

मेरो गाउँघर देवेन्द्रप्रसाद उप्रेती मेरो .....

37. Tana= x/y, then prove that:
ycos2a+ xsin2a= y

We have, TanA = x/y or, x = y tan A.............(i) LHS = y cos 2A + x sin 2A = y cos 2 A + 2 x sin A cos A = y cos 2A + 2 y tan A sin A cos A [ as x = y tan A] = y cos 2A + 2y .....

38. If a and b are two acute angle and cos2a=( 3cos^2b-1)/ 3-cos^2b. Prove that tana= ±root2 tanb

We know, Cos 2x = ( 1 - tan² x ) / ( 1 + tan² x ). Given : cos 2a = ( 3 cos 2b - 1 ) / ( 3 - cos 2b ) ∴ cos 2a = { [ 3 ( 1 - tan² b ) / ( 1 + tan² b ) ] - 1 } / { 3 - [ ( 1 - tan² b ) / ( 1 + .....

39. Prove that: Cot75+cot15=4

Here, LHS = cot75 + cot15 = cot(90 - 15) + cot15 = tan15 + cot15 [ Since, cot(90 - A) = tanA.] = sin15/cos15 + cos15/sin15 .....

40. जीवनी लेख्नुहोस् ।

साहित्यकार बालकृष्ण सम

बालकृष्ण सम आधुनिक नेपाली .....

41. Factorize :
xy(a²+1) -a(x²+y²)

Here, xy(a2 + 1) - a(x2 + y2) = xya2 + xy - ax2 - ay2 Arranging them we get, = xya2 - ax2 - ay2 + xy = ax( ay - x) - y(ay - x) = (ay - x)(ax - .....

42. If two fifth of age of a person is subtracted from his own age result becomes 24yrs .Find age of person

Let the age of the person be 'x'. From given condition, x - 2x/5 = 24 or, 3x/5 = 24 or, x = 24 ⨯ 5/3 = 40. Hence, the age of the .....

43. भाग्य कथाबाट के शिक्षा पाइन्छ ?

44. Democracy is the rule of the majority however minority should be duly valued. Explain.

And the opinion of the minority is also be respected and should be respected. Why because democracy is the system of equal participation to each and every people. It equally requires the fulfillment of the rights of the minority. The .....

45. The temperature range of the tropical desert is high. What is the resaon behind it?

The tropical desert is an environment of extremes as it is the driest and hottest place on earth. Rainfall is minimal and in some years no measurable precipitation falls at all. The terribly dry conditions of the deserts is due to the year-round .....

46. If a= 3-4-5 2 prove that a²-5a = 14 i where i is a identity matrix

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47. How far did Nepal get sucess in MDG?

The Millennium Development Goals (MDGs) are eight goals to be achieved by 2015 that respond to the world's main development challenges. The MDGs are drawn from the actions and targets contained in theMillennium Declaration. It was adopted .....

48. Draw a line 4cm at one end make an angle of 60°now draw a line parallel to the arm of the angle

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49. What is the main cause behind language related problems?

Nepal is a small but a diverse nation. According to the census 2011, there are more than 123 languages spoken in the nation. So, the languages spoke in one part or region varies significantly to another part. Both in terms of meaning and .....

50. Find the equation of a straight line perpendicular to the straight line 7x+3y + 4 = 0 and making y- intercept 8.

We have given equation of line is 7x + 3y + 4 = 20 Slope of this line is, m1 = - coeff.of x / coeff. of y .....