Total are of Bangladesh is 147,610 square kilometers (56,990 sq mi) having 6.4% Water .....

We know, 1 kg = 1000 gm  25 kg = 25 ⨉ 1000 gm  ∴ 25 kg = 25000 .....

Mountainous roads are winding and gently sloping in order to reduce the effect of steepness which causes more downwards gravitational pull to the vehicles on it. A steeper sloped road would slow the car to a greater extent that an gently sloping .....

Let take an example first  C3H8 + O2 --> H2O + CO2 This reaction occurs when propane (C3H8) is burned in the presence of oxygen to produce water and carbon dioxide.

Write down the number of atoms per each .....

We know, 1 kg = 10000 mg So 2 kg =  2 x 10000mg  ∴ 2 kg = 20000 .....

The axis of the Earth is an imaginary line drawn from the North Pole to the South Pole through the center of the Earth on which the Earth rotates.  An imaginary line which divides something into equal halves. The Earth revolves on its axis .....

By the question, Initial velocity (u) = 0m/s Acceleration(a) = 10 m/s2 Time (t) = 5 sec. Final velocity (v = ? By using formula, v = u+ at2 or v = 0+ 10 + 52 or, v = 35 m/s The final velocity of the car is .....

Strongest acid has pH of 1 while the strongest base has pH of 14. (0 - 6.99 are acids. 7 is neutral. 7.1 - 14 are .....

We add the atomic weight of each atom present in the molecule, to calculate the molecular weight of a compound.  Here, in H2 O, the is 2 atom of Hydrogen(H), 1 atoms of oxygen (O).  The atomic weight of H is 1,  O is 16. Let .....

Magnetite occur in almost all igneous and metamorphic rocks. Magnetite is black or brownish-black with a metallic luster. The common chemical name is ferrous-ferric .....

                    Planets                                            .....

Answer: Crystallization is the process of solidification of atoms or molecules into a form called a crystal. It is a purification technique. It refers to the slow precipitation of crystals from a solution of a .....

An inidcator is a substance, as litmus, that indicates the concentration of a certain constituent. Some of the indicators are methyl red, phenolpthalein, litmus, bromothymol blue, methyl orange, etc. Here, phenolphthalein remains colourless if .....

We know that, 1 m = 100 cm 1 cm = 10 mm 1 m = 100 ⨉ 10 mm = 1000 mm or, 1 mm = 11000  m or, 4000 mm = 11000 ⨉ 4000 Therefore, 4000 mm = 4 .....

While dormant, seeds will not germinate even under favourable conditions, but eventually, they break their dormancy and begin to develop. The processes in the seed by which dormancy is broken are known as after-ripening. Dormancy serves to give .....

Given: WXYZ is a cyclic quadrilateral. WA and YB are the bisectors of ∠W and ∠Y respectively. To prove: AB is the diameter of the circle i.e. ∠AWB = 90° Construction: Join WA and BZ. Proof: WXYZ is a cyclic .....

b) 

It is nitrogen, the largest constituent of air.

NH4Cl + NaNO2 = NaCl + N2 + 2H2O

This is one of the usual methods for the preparation of nitrogen in the lab. If sodium nitrate (NaNO3) is taken in place of sodium nitrite, .....

Conflict is the social process which arises due to differences, misunderstandings or miscommunications. It is a process in which individuals or groups seek their dominance by directly challenging the rival by violence or threat of .....

We can improve the efficiency of a simple machine by reducing friction. And the friction can be reduced by following ways:- 1. By using lubricants like oil, grease, etc. 2. By using ball-bearings, wheels and rollers. 3. By making surface .....

Disaster is a sudden/unpredictable natural event which is likely to cause a great damage, Like Volcano, Tsunami, Earthquake etc.  Disaster can be painful, traumatic and can cause adverse consequences. It requires huge Amount of resource and .....

We must know that filament lamp must not be filled with .....

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The viruse which affects fauna (animals) are called animal virus. Two names of animal virus are: 1. Human immunodeficiency virus (HIV) (It causes HIV AIDS in human) 2. Canine parvovirus (It affects .....

I think your question is not .....

Put your hand on a 40watt filament bulb when it’s on it’s very hot be careful. Now put your hand on a 40 Watt fluorescent bulb, it’s just warm. The 40 watt incandescent bulb is busy turning most of it’s power consumption .....

Water can't be used as a thermometric fluid because of the following reasons: 1. It is transparent in nature. So, it is difficult to take readings. 2. They stick to the wall of the thermometer. It will produce an error in reading. 3. The .....

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Seasons on Earth change in response to the regular change in the planet's axial tilt relative to the Sun. Earth is inclined at a 23-degree angle, and as a result it points first one, then the other, hemisphere toward the Sun as it .....

Here is a chart of subshells, their names, and the number of electrons they can hold:

Also, as another answer already pointed out (but was collapsed), to glow the temperature of a light bulb filament has to be so high that it would melt copper. This is why they’re often made of tungsten, which has a high enough melting point .....

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c.  In a chemical reaction, sometimes the product may form an insoluble solute. This is called as precipitate. It is represented by  ↓ or (s) For .....

प्रश्न खै त साथी ? यसो प्रश्न राख्ने कष्ट गर्नुहोस् न ल .....

A country which is surrounded by land is called a landlocked country. Nepal is a landlocked country because it is locked by land from all the four sides. Nepal is surrounded by India in the south and China in the north. Being a landlocked .....

Yes, it will help you to get your .....

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