Students and Teachers Forum
Study the following examples shown in the picture below. Note: Let us know if you still have any .....
Here, Let AB be the height of tree. Point C be the point of observation. So, ∡C = 45o & BC = 60m Now in right angled triangle ABC, Use tan45o = AB / BC And put tan45 = 1 & BC = 60m. Finally you will get AB = 60m, which .....
Plants produce their own food from carbon dioxide and water in the presence of sunlight and chlorophyll: a green pigment which absorbs light energy. Chlorophyll is concentrated in the chloroplasts found in green stems, sepals .....
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Here, we have given 1+ sin2A =3sinA cosA or,sin2A + cos2A +sin2A=3sinAcosA or,2sin2A+cos2A=3sinAcosA or,2sin2A - 3 sinAcosA + cos2A=0 Solve this quadratic u will get 2 factors (sinA-cosA)(2sinA-cosA)=0 Either, sinA-cosA=0 .....
The SI unit for energy is the same as the unit of work – the .....
A nucleus of an atom has protons and neutrons. We know that a proton has a charge of +1, while a neutron has no charge, or 0. Therefore, the nucleus of an atom will always have a positive .....
p + q = 7 p = 7 - q -------------(i) pq = 12 place the value of p from equation (i) (7 - q)q = 12 7q - q2 = 12 q2 - 7q + 12 = 0 q2 - (4 + 3)q + 12 = 0 Solve for q and find the value of .....
Some of the regions of Nepal are still backward for the following reasons: - due to complex geographical structure - lack of infrastructures of development - lack of skilled manpower for different works - lack of natual resources for .....
The area of Nepal is 147,181 .....
Davis Falls is a waterfall located at Pokhara in Kaski District, Nepal. The water forms an underground tunnel after reaching the bottom. This tunnel is approximately 500 feet long and runs 100 feet below ground level. On 31 July 1961, a .....
By question, Let the M.P. be x. S.P. = M.P. - Discount percent of M.P. = x - 20/100 * x = 80/100 x S.P. with Vat = S.P. + Vat Percent of S.P. .....
The electronic configuration of the given elements in terms of sub-shell are:- Mg = 1s22s22p63s2 Al = 1s22s22p63s23p1 K .....
Total number of students = 100 Mean marks of total student = 72 Total marks = Total number of students * Mean mark = 100 * 72 .....
The differences between SI unit and CGS unit of force are:- SI unit of force CGS unit of force i. The SI unit of force is Newton. i. The CGS unit of force is dyne. ii. One newton is the force required to .....
= (1 - 1/p) (1 - 1/(p - 1))(1 + 2/(p - 2)) = (p - 1)/p * (p - 1 - 1)/( p - 1 ) * (p - 2 + 2)/( p - 2 ) = (p - 1)(p - 2)p / p(p - 1)(p - 2) = .....
The position of hydrogen is still controversial in the modern periodic table because it resembles with alkali metals with a valency of +1 as well as it resembles with halogen groups (VIIA) as it exists in diatomic states i.e. H2 like .....
Sustainable development is an approach to development. This approach takes the finite resources of the Earth into consideration. The Brunt-Land Commission regarding sustainable development defines it as the development that meets the .....
In boys, the pubertal sequence entails:
Enlargement of testes Changes in texture and color of scrotum Increased penis size Appearance of pubic hair First ejaculation Growth of facial hair Increased size of larynx and vocal chords .....Sustainable development is an approach to development. This approach takes the finite resources of the Earth into consideration. The Brunt-Land Commission regarding sustainable development defines it as the development that meets the needs of .....
Security and housing is directly related with population, environment and development. Security provides safe and hormonious atmosphere for the people to work. There is no threat of life in the presence of tight securiy consequently they can run .....
Charge of electricity for first 20 units = Rs 80 Charge of electricity from 21 to 50 units = Rs 7.30 per unit Total unit of consumption of energy = 28 units Total charge = Rs 80 + 8 ⨯ 7.30 .....
As you can see in the picture below, binary fission is the process of asexual reproduction by splitting a mother cell into two daughter cells. Fig: Binary .....
Let the numbers be x and y. From the first condition x - y = 3 .............(i) From second condition x . y = 40 using value of x from (i) ( 3 + y ) . y = 40 or, 3y + .....
Silkworm is taken as a useful insect because it produces high-quality fibres from its .....
A nation is a group of people who share the same culture, history, language or ethnicity. it can also be described as people living in the same country and government. When a nation of people has a State or country of their own, it is called .....
If your computer is running any variety of a Microsoft operating system,like windows xp, windows seven, windows eight, or ten or whatever it can run QBasic. If you are still running old version like DOS or Windows 3.1 you will be able to run QBasic .....
To Load qbasic you have to follow these steps, in this article I'm going to demonstrate it on the Windows XP, if you are using windows 10, 7 or whatever just follow the instructions you will be able to load qbasic on your .....
Honey bee live in large groups. They are well organized in their work. They can perform complex tasks from their .....
The uses of silk thread are Silk thread is used to make expensive garments like saree. Silk thread is used to make parachutes. Silk thread can can be used as sutures to stitch .....
As you can see the process, in the figure below. Fig: Electrolysis of .....
Actually, the reaction between sodium chloride and silver nitrate can take place at room temperature. For both of them to react, they must be kept in a solvent which can dissociate them into their respective ions. Like, place them in .....
Silver nitrate is kept in a dark opaque vessel because to prevent a chemical reaction which is activated by the light. light i.e. AgNO3 .....
What is Mendeleev's periodic law? physical and chemical properties of elements is periodic function of atomic mass. So if mass is different then property of elements becomes different. Can Mendeleev's table explain about .....
Please kindly post the question you have problem in solving. Post appropriate questions to related .....
People go to houses of relatives and friends in group. Put colors on each other eat sweets and move the whole day. People dance and play music. This kind of tradition of Holi helps in maintaining social harmony and .....
Please ask one question at a .....
A surd is a square root which cannot be reduced into a whole .....
In some processes like nuclear reactions, some mass is converted into energy. In such conditions, mass energy relationship is used to predict the amount of energy is produced when certain mass is converted into .....
A rational number is any number that can be expressed as fraction of two integers with non-zero .....
The positive integers are called natural numbers. Generally 0 is taken as whole number. Eg. 1, 2, 3, 4, .....
Coal is a substance, which is a source of energy. To use energy, people burn it. During burning, it is converted into ash and smoke. This smoke is cause of pollution also. So Which coal will be of more quality that produces less .....
A number without fraction is called whole numbers. The difference between whole number and integer is that integers contain whole number including its negative part. For example -4 is integer but not whole .....
The solar constant is the rate at which energy from the sun reaches the earth's surface. This value is around 1.4 kW per square .....
Kuto- Hoes, .....