Do you know the formula for efficiency? i.e.  efficiency = ( load ⨯ load distance ) / (effort ⨯ effort distance)⨯100 %  and here we have given effort applied = 400 N mass = 150 kg  or, load = 150 ⨯10 = 1500 N   Effort .....

It is 19. As energy levels are numbers as 1,2,3,4 ... and represented by the letters K,L,M , N.. K Shell contain 2 electrons L can accommodate 8, M 18 and so on which can be calcualte  by using the formula 2n2. Similarly for potassium, K .....

Yes, of course you have. Dogs are pet animals. Mostly we see people adopting the dogs and taking care of them like  their family members.They  can be good friend as well. People kept dog for security also. We can also see many dogs in .....

She is the tallest among us.  Here, 'tallest' shows that no one else is taller than her.  So, 'tallest' is superlative .....

Have you ever been in a bus A at a station, seen another bus B moving off and felt you were moving even though you were stopped at the platform? This illusion occurs because there’s no way to distinguish between motion at constant speed and .....

Storms form when warm, moisture-laden air rises rapidly into the atmosphere. As the air rises, it cools and the moisture condenses, falling back to Earth as precipitation.  The rising warm air cools and falls, creating a convection current .....

Human beings have always lived together since the early days of development primarily for safety and security. Neighbours are the persons who live in the same locality, street and with whom we interact regularly. we live with our nieghbours .....

You may have noticed that the families of classmates at school or among your friends can be very different from yours.  But the basic similarities are that members of a family usually live together.  There will be many unces, aunts, .....

Damping, in physics restraining of, vibratory  motion. For example :  

1. Take the mixing bowl and put it on the table.

2. Smack it with the wooden spoon.

3. Listen to the sound.

4. Put your ear next .....

कुनै एउटा वाच्यको वाक्यलाई अर्कोमा परिवर्तन गर्नु वाच्य परिवर्तन हो । वाक्यमा रहेका .....

 Do you know what is volume ? Volume is the level at which amount of gas,liquid,space can be measured. Its S.I unit is m3. It can be calculated by using the formula Volume = lenght Χ breadth Χ height For example : Volume of .....

3.  For example, "Cleaning the room" can seem like a simple task                                            But, What .....

density = mass / .....

Obviously you must have learnt it. Heat is an agent which produce sensation of warmth and makes our bodies hot. Effect of heat are as follows : 1.When we heat anything, its temperature rises. 2. Upon heating any substance, its volume .....

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This is because crayfish is freshwater crustacean which resembles small lobster. Although crayfish and fish both live in water, this is the only way in which they are the same. But their anatomy is all different  There is a multitude of .....

उनले विभिन्न पुस्तकहरु पनि लेखेकाछन् । उनी भूगोल विषयमा विद्यावारिधि गर्ने पहिलो नेपाली .....

Mercury is used in the thermometer beacuse, It’s shiny. You can easily see the level of mercury inside a glass thermometer.  It’s sensitive. Heating even on a small scale causes significant expansion in it’s volume which .....

यस हरफमा उपमाका प्रयोग गरिएको छ । वर्षायाममा घाँसपातहरु हरियो भएर आउछु भन्ने कबुल गरेजसरी .....

(1 + tanA)2 + (1 - tanA)2 = 2sec2A L.H.S. = (1 + tanA)2 + (1 - tanA)2 = 1 + 2tanA + tan2A + 1 - 2tanA + tan2A = 1 + 1 + tan2A + tan2A = 2 + 2tan2A = 2(1 + tan2A) = .....

जे उत्पादन गरे पनि यहीँ टारी र बारीमा गर्नु पर्ने यहीँ उत्पादन गरेर हाम्रो सिप फलाउनु पर्ने .....

Do you know the formula for the circumference of wheel and axle? Let R be the radius of wheel and r be the radius of axle. Then, the circumference for wheel and axle be 2πR and 2πr respectively. we know,   load ⨯ load .....

सर्वप्रथम त्यो अनुच्छेद मजाले  पढ्ने, त्यहाँका मुख्य बुँदा टिप्ने, असमापिका क्रियाको .....

Here, Given: ABCD is a parallelogram, AQ bisects CD, CP bisects DQ To prove : Area of  ∆ QOR = 1/12  of  //gm ABCD. .....

<A=<E  (angle made by equal arcs are equal) So the Points A,P,Q and E are concyclic. that means we can draw a circle which passes through these points. Join A and E <AEP=<AQP (angles on same arc AP)..........1  Look big .....

Here, Given:  O is the centre of a circle & two chords XY and MN are produced to meet at A. To  prove .....

Here, LHS = (1 + sin4A)/ cos 4A =1/cos 4A +sin4A /cos 4A =sec4A + tan4A Now, Use formula, a2 + b2 = (a - b)2 + 2ab. Then, you will get .....

Have you ever heard about the country named Mayanmar, also known as Burma.      These are pagodas found in city called Bagan.  Bagan is considered as "City of Pagoda" where one can find over 2, 000 pogadas, temples and .....

Compare it with standard quadratic equation. The standard quadratic equation = ax2 + bx + c = 0. Comparing we get, value of a, b and .....

The given expression 3x + 2y is binomial. An algebraic expression, which consists of two terms, is called a binomial. All the variable terms are different in binomial. Power and variables within single numerical are considered as a single .....

It actually depends on the question, but in most of the case, simplifying the terms by taking LCM can help a .....

We talk to each other while sitting together. We receive information of our own places,  surrounding and distant laces through letters, radio, televison, newspaperaad telephone. Information about different  events is called .....

Use the formula that, no(N) = n(N) - n(N ∩ S) to find students passing in Nepali .....

You obviously know that we perform work in our daily life in various ways. Work is simply physical or mental abilities to complete any .....

Sajan, if observed Leopards have a black or brown spot. The pattern tends to be rose-like and so is known as rosette.  whereas, Cheetahs have dark black, circular or oval spots on the yellowish orange/ golden .....

For number 'b', only the bill amount is higher. And due to that, The consumed units would fall under 3rd  category of charges provision which is above 250 units. Give it a .....

Please send the question properly.It seems to be incomplete. It may contain the figure as .....

Here, you are asked to find n(B U C) Well, n(B U C) = n(B) + n(C) - n(B ∩ C) In the question, n(B) , n(D) and n(B .....

The animals, that eat meat of other animals, are called carnivorous .....

Further, space is a vacuum, meaning that sound cannot carry because molecules are not close, enough together to transmit sound between them. That's not to say that space is empty, however. Gas, dust and other bits of matter float around .....

Notice the word beam here. A beam is a collection of many light rays.  When a light beam enters another medium at an slanting angle the ray that reaches the medium   first changes it's velocity before any other ray, the change in .....

Please send one quesion at a .....

Jung Bahadur was the ruler of Nepal and was also the founder of Rana dynasty in Nepal.  His real name was 'Bir Narsingh Kunwar'.  But, he became famous with the name Jung Bahadur Rana. This name was given to him by his maternal .....

 In numbers  12 = 1 dozen 1 = 1/12 dozen Therefore 7500 = 1/12 .....

The Universal Declaration of Human Rights (UDHR) is a milestone document in the history of human rights. It was drafted by representatives with different legal and cultural backgrounds from all regions of the world. The Declaration was proclaimed .....

The literal meaning of dhikuti is a storage room. Dhukuti originally refers to ‘storage’. People keep or store grains in dhikuti. It is an ancient practice similar to a cooperative. It was in practice much before the inception of a .....

Gravitational field intensity (gravitational field strength) is the amount of force exerted on each unit of mass of an object at a point in space caused by the presence of another object. " The more massive object is usually considered the .....

From the above formula we can know  efficiency depends upon following factors : 1. Load  2. Load distance 3. Effort applied 4.Effort .....

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You must know,  The ratio of the distance moved by the point at which the effort is applied in a simple machine to the distance moved by the point at which the load is applied, in the same time. Using an oil in the machine will reduce the .....