On second day out of Cape Town, they began to encounter strong gales. For the next few weeks, they blew continuously. The size of the waves was alarming — up to 15 metres.

The Crusades had the following effects in Asia.
1. They led to the intensification of violence in West Asia, thereby leading to the loss of many lives.
2. They weakened the Byzantine empire, based in Constantinople, and contributed to its eventual defeat at the hands of the Ottomans.
3. They led to the entry of new population groups from Europe into West Asia. For example, people from French Levantine arrived and settled down in present day Lebanon, Palestine and Turkey.
4. They led to the emergence of short lived Christian states in Palestine based in Jerusalem.
The Crusades had the following effects on Europe.
1. They reopened the Mediterranean sea to commerce and contributed to the rise of Italian trading city states like Venice and Genoa.
2. They increased the power of the Catholic church in Europe and increased its ability to create wars and inflict violence on the common people.
3. They became a source of tales about heroism, valour and chivalry in Europe.

Business may be defined as an economic activity involving the production and sale of goods and services undertaken with a motive of earning profit by satisfying human needs in society. Business is considered to be an economic activity because it is undertaken with the aim of earning money or livelihood and not because of any sentimental reason like love, affection or sympathy.

slap {tex}\times{/tex} speed = Power
Dimension of slap = {tex}\frac{Power}{speed}{/tex}
= M¹L²T^-3/M⁰L¹T^-1
= M¹L¹T^-2

Main differences between systematic and regional approach are summarized below:

Systematic geography:-The study of a particular element in geography,such as agriculture and settlement,seeking to understand the processes which influence it and the spatial patterns which it causes.

Regional geography:-It is a major branch of geography.It focuses on the interaction of different cultural and natural geofactors in a specific land or landspace,while its counterpart,systematic geography.

The wind dropped, and the sky immediately grew dark. Then came a growing roar, and an enormous cloud towered aft of the ship. With horror, narrator realised that it was not a cloud, but a wave like no other he had ever seen. It appeared perfectly vertical and almost twice the height of the other waves, with a frightful breaking crest. The roar increased to a thunder as the stern moved up the face of the wave, and for a moment he thought they might ride over it.
But then a tremendous explosion shook the deck. A torrent of green and white water broke over the ship, Narrator's head smashed into the wheel and he was aware of flying overboard and sinking below the waves.

Molality (m) : It is the number of moles of the solute dissolved per kilogram (kg) of the solvent. It is denoted by m.
{tex}\therefore{/tex} Molality (m) {tex} = \frac{{{\text{No}}{\text{. of Moles of solute}}}}{{{\text{Mass of solvent in kg}}}}{/tex}
{tex}\therefore \,m = \frac{{{W_2} \times 1000}}{{{M_2} \times {W_1}}}{/tex}
Where W₁ = mass of solvent
W₂ = mass of solute
M₂ = Molar mass of solute . Unit is mol/Kg
Molarity (m): It is the number of moles of the solute dissolved per litre of the solution. It is denoted by M.
Molarity {tex} = \frac{{{\text{No}}{\text{. of moles of solute}}}}{{{\text{Volume of solution in litre}}}}{/tex}
{tex}\therefore \;M = \frac{{{W_2} \times 1000}}{{{M_2} \times {V_1}}}{/tex}
where W₂ = mass of solvent
M₂ = molar mass of solute
V = Volume of solution. Unit is mol/L
The molarity and molality of a solution will be nearly same if the mass of solvent is nearly equal to the volume of solution.

Mass of an electron = 9.1 {tex}\times{/tex} 10^-28 g
9.1 {tex}\times{/tex} 10^-28 g is the mass of = 1 electron
1.0 g is the mass of = {tex}\frac{1}{9.1 \times 10^{-28}}{/tex}= 1.098 {tex}\times{/tex}10²⁷ electrons

A liability is defined as the future sacrifices of economic benefits that the entity is obliged to make to other entities as a result of past transactions or other past events.
An asset is any resource owned by the business. Anything tangible or intangible that can be owned or controlled to produce value and that is held by a company to produce positive economic value is an asset. 

'Cardboard’ in the poem refers to the photograph. This word has been used because photograph is now just a piece of paper with the memory as the poet's mother is dead now. It shows that human life is transitory and the cardboard which remains is memorable piece of paper.

Discrete Variable: A discrete variable is one which increases in jumps or in complete numbers. For example, there can't be 2.4 workers in a factory. They can be 1, 2, 3, 4 and so on. Similarly, a factory can't have 4.8 or 2/7 machines. It will be in complete numbers like 1,2,3,4, and soon. Such variable are called discrete variable. Some other examples of discrete variable are number of workers in a factory, number of machines purchased, number of children etc.

Continuous Variable: Those variables which can assume any value in a given range and which increase continuously and not in jumps are called continuous variable. For example, weight of a person can be 45.234kg, it can take any value within a range. No one gains weight in jumps. It increases in continuity. Other examples are height, income etc.Continuos Variable always lies in a particular interval or range .For instance, height of a child is 3.5 metres which lies between 3 and 4.So, here the interval is equal to( 3,4).

Alkali metals dissolve in ammonia to form a blue colour solution. The blue colour of the solution is due to ammoniated electron which absorbs energy in the visible region of light and imparts blue colour to the solution.
M + (x + y)NH₃ →[M(NH₃ )_x ]⁺ + [e(NH₃ )_y ]⁻