Students and Teachers Forum

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Light is an electromagnetic wave unlike sound wave which is mechanical wave. Electromagnetic waves(like light) does not require medium to travel and it has a fundamental property of travelling at a higher constant speed. However, sound, being a .....

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Slope of line passing through (2, 3) and (3, -1) is: Slope (m) = (y2 - y1)/(x2 - x1) = (-1 - 3)/(3 -2) = -4. So, the slope of required line(m) = -4 [Because the two lines are parallel] The required line also passes through (2,1). So, (x1, y1) = .....

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Ashambhav took the money bag of a saint, Deva and fled .....

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समाजसेवा  
भविष्यमा हरेक व्यक्तिको केही न केही .....

Maps are drawn on the piece of paper that represents the Earth that why it is flat. But on the other hand, the globe is the representation of the physical structure of the Earth that is why it is .....

If a vector is multiplication to another vector any scalar, then these two vectors are saod to be parallel to each .....

We have given ,  In a continious series,  ∑fx = 400 + 10a and ∑f = 40 + a, We need to find the mean. We know,  Mean = ∑fx / ∑f                = [400 + 10a ]/ .....

Here we have given,   l = 7 cm, b = 5 cm, volume = 105cm3, We need to find h. We know,  l x b x h = V or, 7cm x 5cm x h = 105cm3 or, 35 cm2 x h = 105cm3 or, h = 105cm3/ 35cm2 or,  h = 3 cm. hence height of .....

They may make themselves more effective by helping the rural and the backward communities for their development. They may also make themselves by on bowing to pressure from any power centres. They may make themselves effective by encouraging the .....

The civil society may work as the bridge between the government and the citizen of the nation. The general people may help to implement the plans and the policies for the long-term and the effective development of the nation. They may promote the .....

The civil society especially the lawyers, journalists, university teachers and students also gave a boost to their peaceful protest to restore the democratic system in the country. The SPA ( Seven Party Alliance), after it got the positive response .....

Corruption: One of the biggest threat of good governance is corruption. And, in the context of Nepal, this is the deeply embeded social problem that has nearly jeopardized the whole country. The existence of such problem in the country and,on the .....

In a democracy, civil society groups should have respect for the law, for the rights of individuals, and for the rights of other groups to express their interests and opinions. In fact, the word “civil” implies tolerance and the .....

‘हुने बिरुवाको चिल्लो पात’को अर्थ राम्रो हुने लक्षण सानैमा थाहा हुन्छ भन्ने हो र यसलाई .....

‘कपाकप’ शब्दको अर्थ खानु हो । यसलाई वाक्यमा प्रयोग गर्दा यस्तो हुन्छः साथीलाई निकै भोक .....

शान्तिले यो विश्वलाई मानवै मानव बसेको विशाल घरको रूपमा चिनाएकी छन् । विश्वमा रहेका हामी .....

कमलको विचारमा टेलिभिजनमा काम नलाग्ने कार्यक्रम देखाएको थियो । यसकारण उसले टिभी बन्द गर्न .....

नेपालको स्वाधीनतामाथि लगातारको हस्तक्षेप तथा सीमा अतिक्रमण हुनुमा राजनीतिक दल र सरकारको .....

 व्याख्या दुई अनुच्छेदमा लेख्नुपर्छ । एउटा अनुच्छेमा व्याख्या गर्ने अनि अर्को अनुच्छेदमा .....

You may know that, in optics, power is a measure of how much the lens bends light. The tendency to converge the rays decides the power factor. So shorter the focal length, converging is large. Hence power is reciprocal of focal length. Power .....

Here, total ferquency = N = 20 We know,  median class in continuous series = ( N / 2)th item  = 20 /2 th item   = 10 th item Corresponding value of cf 10 or just greater then 10 is 12. So, Median class = 20 - .....

Guardians are the most important persons who give constructive suggestions for the growth of the school. Guardians are very aware of the fact that if the quality and system of the school are in the children's favor. If they find weaknesses in .....

 
अनुशासनको महत्व 
अनुशासन शब्द .....

अन्तिम ग्रुपका तत्त्वहरु (He, Ne, Ar) मा भने बाहिरी सेल पूर्ण हुने भएकाले तिनीहरुले इलेक्ट्रोनको .....

39. In nature, predators and prey seem to play a game of hide and seek. The prey need to hide, so that predators do not find them and eat them. Predators need to hide too, so that smaller prey cannot see them approaching. Some animals have special colours or marks on their bodies that help them hide among trees, rock and grass. This blending is called camouflage. The earth tone colours of deer and squirrels help them hide from predators among the browns of trees., bushes and soil. A brown squirrel can be difficult to see when it is scampering among brown autmn leaves. A brown deer can be overooked when it is hiding between tree trunks. The deer and squirrels special colouring help them to hide from predators. African lions have a tan body colouring. However, lions use it not to hide in savanna grasses while watching for prey.

A lion can sneak up on prey without being seen more easily by blending into the grassy environment. Another popular animal camouflage clour is green. The green tree frogs of Australia blend in and hide from predators better because of their colour. Gree tree pythons and emerald boas, meanwhile are more like lions, using their green colour to blend in. When a likely meal (a road bird or lizard) comes along: these snakes strike quickly, catching the prey.

According to this text, answer the following questions:
a.) why do the predator have to camouflage?
b.) what does the pray have to blend in and hide for?
c.) Name the animals that use the green colour to blend themselves.
d.) which animals are described as prey to pythons and boas?

a. The predators have to camouflage so that smaller prey cannot see them approaching.  b. The prey have to blend in and hide for as it helps them to hide among trees, rock and grass and predators do not find them and eat them.  c. Thg .....

Here, Principal = P =Rs.100000 Compound interest = I = Rs.33100 Rate = R = 10% Time = T = ? We know,  I = P [ ( 1 + R / 100) T- 1 ] or, 33100 = 100000 [  ( 1 + 10 / 100) T- 1 ] or, 33100 / 100000 =  ( 1 + 10 / 100) T- .....

Here, Net Profit = Rs. 1,85,000 Bonus% = 25% Number of employer = 20 We know,  Total bonus amount = Net Profit  x  Bonus% = 185000 * 25/100 = Rs. 46250 Since the profit was divided among 20 employes .....

As there are 52 weeks in a year. weeks correspond to 7 x 52=364 days. So, the last day is the one which should be a Sunday for you to get 53 Sundays. Sample space has seven days as options. So probability of getting 53 Sundays in a non-leap year .....

Refractive index is the ratio of the velocity of light in a vacuum to its velocity in a specified .....

Advantages of anomalous expansion of water: - It enables fish to survive in water as    ice floating on water helps insulate the water under it. - It helps in weathering of .....

The mammalian feature found in human brain are  1. Mammals consist a 6 layer cerebral cortex with associated structure and so does human. 2. The cortex is larger in humans and mammals than animals of other phylum. 3.The cerebral cortex is .....

The term 'glycol' is often applied to the simplest member of the class, ethylene glycol. The structural formula of ethylene glycol is given .....

Leaf folding is due to the rapid uptake of water and increase in volume of some cells in the pulvinus (thickening part at the base of leaflet) This kind of rapid movement of plant parts in response to a stimulus that occurs due to change in cell .....

- Metals donate electrons readily whereas   non-metals accept electrons.   - Metals form positive ions by losing electrons whereas,    Non-metals form negative ions by gaining electrons. - Metals have lower .....

You may know that most of the mammals do not have nucleus in their RBC (anucleated RBC). But camels have nucleus in their RBC (nucleated RBC). You know that camels have to live without food and water for a long time. So, nucleus in RBC of camels .....