Students and Teachers Forum
uses of convex mirror:
1.They are also used in making lenses of sunglasses 2.They are used in magnifying glass 3.They are used in telescopes .
A plane mirror is a type of mirror with flat reflecting surface in which image distance equals to object distance. Uses of Plane Mirror : 1. They are used as looking glass. 2. They are used in solar cookers. 3. They are also used in .....
Ans: For plane mirror, image distance = object distance So, image is formed at 5 metre away from plane mirror. And, distance between image and him = 5m+5m = .....
Solution : 8 workers can complete the building wall in 30 days 1 worker can complete the building wall in 30*8 days 1 worker can complete the building wall in 240 days so, 15 worker can complete the building wall in 240/15 days Therefore, 15 .....
Ans: Bag cannot fly because it is non-living thing. But yes, if your question is about bat; yes, bats can .....
Eye Donation refers to only the transplant of the Cornea from one person to the other person. The cornea is a contact lens sized, clear piece of tissue in the front .....
Since atomic mass is the sum of number of neutrons and number of protons. There are 7 protons and 7 neutrons in nitrogen. so, atomic mass of nitrogen is 14 amu(atomic mass .....
Solution: Total Students = 275 % of boys = 48% % of girls = 100%-48% = 52 % i) Number of boys = 48% of 275 = (48/100)*275 = 132 ii) Number of girls = 52% of 275 = (52/100)*275 = .....
The major functions of leaf are: i. Respiration ii. Food making ( Photosynthesis) iii. Throwing out excess of water from plants .....
The hieght of mt. Machhapuchhre is .....
Executive, legislative and the judiciary are the three important organs for any nations and are responsible for carrying out the daily businesses of nation. Amongst these three, the judiciary is the most important as it is responsible for .....
a) A milligram is a unit of weight and mass that is based on the SI (International System of Units) base unit of mass, the kilogram. It is equal to 1/1,000 grams, or 1/1,000,000 kilograms. 564 miligram = 564/1000,000 Kilograms =0.000564 .....
Solution : Tap-A can fill 1/3 part of a tank in 1 hour. Tap-B can fill 1/4 part in 1 hour. Tap-C can empty 1/8 in 1 hour. Tap A and Tap can fill (1/3+1/4) part of tank in 1 hour or, Tap A and Tap can fill (4+3)/12 part of tank in 1 hour. or, .....
(a+b)2= (a+b)(a+b) = a2+ab+ba+b2 = a2+ab+ab+b2 = .....
A phobia is a type of disorder that causes an individual to experience extreme fear about a situation, living creature, place, or object. When a person has a phobia, they often fear and avoid what they consider to be .....
Solution: Let present ages of mother be x and that of daughter be y. 1st Case: x=y2 ............ (1) 2nd case: (x+5) = 3(y+5) x+5=3y+15 x=3y+10 .......... (2) Solving (1) and (2), (3y+10)=y2 y2-3y-10 = 0 y2-5y+2y-10 = 0 y(y-5)+2 .....
Any issues that are of national issues importance may be termed as issues of national concern. These issues may vary from nations to nations. Since, Nepal s a multilingual, multireligious and multicultural nation as there are 10 religions, .....
Established on 24th. October 1945, United Nations was an international organisation whose primary role is to maintain international peace and security and prevent any future wars like WWII. However, the organisation is dominated by the .....
We know, 1 m3 = 1000 litres or, 1 litre = (1 / 1000) m3 Therefore, 15 litres = (1 / 1000 ) ⨉ 15 m3 = 0.015 .....
We know, 1 m3 = 1000 litres or, 1 litre = (1 / 1000) m3 Therefore, 15 litres = (1 / 1000 ) ⨉ 15 m3 = 0.015 .....
There are different hypothesis regarding the origin of Earth and other planets. According to nebular hypothesis : Nebula (mean gases and dusts) was formed. It cools, condenses, the main dust particles condensed formed the sun and the dust .....
The Great Barrier Reef is the world's largest coral reef system composed of over 2,900 individual reefs and 900 islands stretching for over 2,300 kilometres (1,400 mi) over an area of .....
Chordates include animals with backbones (vertebrates) . At some time in their life, chordates all possess a stiff rod, called a .....
According to new rules adopted by the International Astronomical Union, a celestial body must meet the following criteria in order to qualify as a planet: A planet must be round. A planet must orbit the sun. A planet must have “cleared the .....
Coronaviruses are a family of viruses that can cause illnesses such as the common cold, severe acute respiratory syndrome (SARS) and Middle East respiratory syndrome (MERS). In 2019, a new coronavirus was identified as the cause of a disease .....
The periodic contraction and relaxation of heart is called heartbeat. In average, our heart beats about 72 times per .....
पुतलीको जीवन चक्र अनौठो किसिमको हुन्छ । अन्डाबाट लार्भा बनेपछि मात्र पुतलीको रूप आउँछ .....
Formula to calculate area of circle is Π*r2 and formula to calculate circumference of circle is 2*Π*r where Π= pie = 3.14 and r is radius of .....
Gravity is independent of mass of the falling object. When you drop two bodies, they both touch ground under same time without air friction considered. Nevertheless, When air fricition .....
Muscular force is the force applied using parts of the body like arms or legs. It is force that results due to the action of muscles of our body. Examples: -An animal pulling a .....
The largest flower of the world is the Rafflesia arnoldii. This flower is found in the rainforests of Indonesia. It can grow to be 3 feet across and weigh up to 15 pounds! It is a parasitic plant, with no visible leaves, roots, or .....
For 25 days, hostel have provision for 60 boys For 1 day, hostel have provision for 60*25 boys For 15 days , hostel have provsion for (60*25)/15 men so, For 15 days , hostel have provsion for 100 .....
Salt reduces the freezing point of water. So, salt water has a lower freezing point than fresh water. Hence, the ice cube will have to absorb less heat in order to melt in salt water than in fresh water. So, an ice kept in .....
Some good habits are: - Obeying safety rules - Eating healthy diet - Respecting our seniors - Doing regular exercise - Crossing the road from zebra-crossing - Obeying our .....
Solution: Let the common ratio be x so, length (l)= 3x breadth (b) = 2x Perimeter (P) = 160 m or, 2(l+b) = 160 or, 2(3x+2x) = 160 or, 10 x = 160 so, x = 16 m Then, length (l) = 3*x = 3*16 = 48 m = 48*100 cm = 4800 cm breadth (b) = 2*x = 2* 16 = 32 .....
Dashain festival is one of the greatest festivals in Nepal. It is celebrated with the great joy and jubilation. Dashain is celebrated by the Hindu followers all over Nepal. It is the festival that brings happiness and delivers the message of .....
Your answer may .....
Jay Prakash Malla was the king of Kantipur when Prithivi Narayan Shah was in the process of unifying .....
LHS cosec 4θ - cosec 2θ Lets take cosec 2θ common from both terms, cosec 2θ (cosec 2θ -1) Using trigonometrical identity cosec 2θ = 1 + cot 2θ (1 + cot 2θ) cot 2θ = cot 2θ + .....
The given equation is 2x+3y=11 Slope of this line (m1)= -co-eff of x/ co-eff of y = -2/3 Any line parallel to above line will have same slope. Then, for next equation, x/a+y/b=1 since, a+b = 15 b= 15-a so, x/a+y/(15-a) = 1 (15-a)x + ya =a(15-a) .....
Breadth is the measure of the second largest dimension of a plane or solid figure. It is the distance from side to .....