Students and Teachers Forum
The acceleration produced in a freely falling body due to the effect of gravity only is called as acceleration due to gravity. According to the definition of weight or gravity, W = GMm/R2 From Newton's second law of motion, W = mg Or, .....
Weightlessness is the condition at which the apparent weight of a body is zero. Weightlessness is possible in the absence of .....
Tax may be defined as charge levied by the governmant or concerned authority for service they provide. Direct tax is a tax that a person or organization pays directly to the autjhority that imposed it. Direct tax can not be passed to some other .....
Exposing your eyes to the sun without proper eye protection during a solar eclipse can cause “eclipse blindness” or retinal burns, also known as solar retinopathy. This exposure to the light .....
It means that in each second, the velocity of the body increases by 5 m/s. If it started from rest after one sec its velocity is 5 m/s, after two seconds it is 10 m/s, after three seconds it is 15 m/s .....
Displacement is a vector quantity which means it depends upon direction and magnitude. In other words, displacement could be defined as the shortest distance between two points. It can be positive, zero or even negative. When we throw a ball .....
Here, LHS = (sinA + cosA)2- (sinA - cosA)2 Breaking whole square, we get = Sin2A + 2sinA cosA + cos2A - sin2A + 2sinA cosA - cos2A = 4 Sin A Cos .....
N2 mean a molecule of nitrogen . and, O2 mean a molecule of oxygen .....
RAju may may cut his palm by sharp objects like blade or knices while .....
Solution : initial velocity u = 0 m/s acceleration a = 2 m/s2 time t = 2 sec final velocity v = ? We know, a = (v - u) / t or, 2 = (v - 0 ) / 2 or, 2 = v/2 or, v = 4 m/s So, the final velocity is 4 .....
Solution : VA = 12 m/s VB = 8 m/s As they are moving in the same direction so the relative velocity VAB VAB = VA - VB = 12 - 8 = 4m/s If they are moving in opposite direction, VAB = VA + VB = 12 + 8 = 20 .....
Solution : inital velocity u = 0 m/s acceleration a = 0.25 m/s2 time t = 3 minutes = 3 * 60 = 180 sec final velocity v = ? we know, a = (v-u)/t or, 0.25 = ( v - 0) / 180 or, v = 0.25 * 180 = 45 m/s so, the final velocity is 45 .....
Here, Initial velocity (u) = 45 km/hr = 45 ⨯ 1000 = 12.5 m/s .....
Solution : initial velocity u = 20 m/s final velocity v = 50 m/s time t = 5 sec acceleration a = ? we know, a = ( v - u) / t = ( 50 - 20) / 5 = 30 / 5 = 6 .....
Solution : initial velocity u = 0 m/s acceleration a = 0.2 m/s2 time t = 3 minutes = 3 * 60 = 180 sec final velocity v = ? distance s = ? we know, a = (v - u)/t or, 0.2 = (v - 0) / 180 or, v = 0.2 * 180 = 36 m/s and, s = ut + 1/2 * .....
Here, Initial velocity (u) = 36 km/hr = 36 ⨯ 1000 = 10 m/s .....
यहाँ अघिल्लो पुस्ता र पछिल्लो पुस्तामा सोचाइका दृष्टिले भिन्नता पनि देखाइएको छ .....
आफ्नो नाम शुद्धसँग लेख्ने प्रयास गर्नुहोस् है । सुरुमै नाम लेख्न बिग्रेपछि पछिसम्म दुःख .....
Due to inertia of rest, the mango fruit try to be in rest when a tree is shaken. But the branch and trunk comes into motion which causes the fruit to separate from its branch. Hence, the mango fruits fall when a tree is .....
A society may be defines as a group of people who interacts with each other by meaningful conservation which results in development. The people may have different ethnic, liingual and cultural as well as political background. They may still .....
A screw is a modified inclined plane with grooves cut in it. A screw looks like a nail having a winding edge called a .....
The efficiency of a perfect machine is 100%. but, in actual practice, none of the machine are 100% .....
Let us take two sets, A={ a,b,c,d} and B={1,2,3,4} Let us take a relation, R= {(a,1),(c,2), (d,4)} Here, 1st elements of ordered pairs of the relation {a,c,d } are called domain and Second elements of ordered pairs of the .....
Human Trafficking and Control Act 2067 BS defines Human trafficking as selling or buying a person for exploitation, forced labour and risky industrial works. Women's, trafficking is the violation of Women's' Right and forceful trading .....
Sericulture, or silk farming, is the cultivation of silkworms to produce silk. Although there are several commercial species of silkworms, Bombyx mori (the caterpillar of the domesticated silk moth) is the most widely .....
अधिकांश व्यक्तिले बिलासी जीवन नै बिताउन चाहन्छन् तर जसले यस्तो जीवन चाहन्छ, त्यो नै दुःखमा .....
We know that gravitational force is directly proportional to mass and inversely proportional to square of distance. Sun is too bigger than moon , so its gravitational force is obviously too greater. But, from earth, sun is too far as compared to .....
Traditional architectures are the monuments that are built by our ancestors and are handed to us through time. Our traditional architectures are our window to our past history. Many of our architectures are of religious and cultural importance .....
Solution : length of square field l = 20m Perimeter of square field P = 4l = 4 * 20 = 80 m Thus, 80 m is travelled in one complete round of the square .....
Block Mountains are formed when the two tectonic plates move away from each other causing cracks on the surface of the .....
In earth science, erosion is the action of surface processes that removes soil, rock, or dissolved material from one location on the Earth's crust, and then transports it to another .....
Given, Mass of the first object= 200 kg Mass of the second object = 200 kg Distance= 2 m Gravitational force=? Now using the formula F= ( G m1m2 ) / d2 Where G= 6.67*10-11Nm2/kg2 F = 6.67*10-11 x 200 x 200 / 22 .....
A society may be defined as group of people who have a common social and cultural norms developed by themselves for peace and harmony. The society especially comprises of people from various ethnic, lingual and religious groups. They may have .....
Before the development of agricultural society about 12000 to 11000 years ago, human society was in hunting and gathering stage, In this stage, people primarily depends upon collecting wild foods fr their survival. Depending upon the local .....
Due to the invention of internet, the people of the world have been connected together. Nothing is secret as it used to be in the past. The people have access to information so they can know what is going on around. And, this too has refined the .....
Human society went through different stages of development during its development. Some of the major differences between Hunting-gathering society and Animal rearing society are: Hunting-gathering society Animal rearing .....
Those objects having fixed shape and size with proper dimensions is called regular objects. Area and volume of a regular object can be find by using formula. Those objects having no proper fixed shape and size is called an ireegular objects. Area .....
Examples of some of the most commonly known non-flowering plants are ferns, mosses and .....
The central government is the chief administrative authority headed by Prime Minister who is elected by the members of an elected parliament. Some of the functions of central government are: run daily administrative duty of nation maintain .....
In the gases, the molecules are present in irregular pattern. The molecules are not closely packed and they can move freely from one place to another and have high kinetic energy.
The molecules have weakest intermolecular forces of .....
A society is a group of people living in an organized way in a certain territory. Some of the important features of a good society are: - Security - Affinity - Unity - Responsibility - Interdependence and cooperation. - Obedience to rules and .....
Corona for the environment has turned out to be a boon for the following reasons: improve air quality due to shutdown of industries and automobiles people began recycling waste rather than throwing them out improve in the quality of water as .....
a = (v - u) / t or, a = (16.67 - 0) / 300 = 0.056 .....