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imagr.html
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<!DOCTYPE html>
<html>
<head>
<title> student </title>
<style>
.topdiv
{
background-color:pink;
}
.middiv{
background-color:lightblue;
}
h1{ text-align:center;}
.lwrdiv{
color:red;
font-family:courier;
}
</style>
</head>
</body>
<p><img src="https://i.pinimg.com/originals/0d/cd/6f/0dcd6f4e410a34465a2d611913199e50.gif" alt="Smiley face" style="float:left;width:42px;height:42px;"><em><h1>HTML PAGE</h1></em></p>
<div class="topdiv">
<h1> HTML web</h1>
<p>There are different stages in our life. One of these stages is student days. Student life is considered as the most important period of our life. Our future dreams, desis and hopes depend upon it. Student life is a period of preparations. It is a period of education. At this time, our mind is like clay. Clay is a soft thing and the potter designs various things out of the clay. Like clay, our mind can also be shaped in different ways. Once the pots are made their shape cannot be changed. Likewise, once our character is formed in one way, it cannot be changed easily. If we make right use and receive good education during our student life, we shall be successful in future. On the other hand, if we aren’t serious at this time, we can’t achieve our goals. Students, therefore, should be very careful. We must think seriously before every step we take. We must learn new things as much as possible at this period.
Students are the future leaders of a nation. The prosperity of a nation depends on its students. We have a responsibility to acquire proper education, maintain good character and live a respectable social life. Obedience, diligence, regularity and forbearance are the important parts of student life. We must learn perseverance; it is the root of all success. If we are idle and cannot move on according to time, we can achieve nothing.</p><hr></div>
<div class="middiv">
<h1>Chemical and physical properties</h1>
<p>Main article: Properties of water
See also: Water (data page) and Water model
Water (H
2O) is a polar inorganic compound that is at room temperature a tasteless and odorless liquid, nearly colorless with a hint of blue. This simplest hydrogen chalcogenide is by far the most studied chemical compound and is described as the "universal solvent" for its ability to dissolve many substances.[6][7] This allows it to be the "solvent of life":[8] indeed, water as found in nature almost always includes various dissolved substances, and special steps are required to obtain chemically pure water. Water is the only common substance to exist as a solid, liquid, and gas in normal terrestrial conditions.[9]
States
The three common states of matter
Along with oxidane, water is one of the two official names for the chemical compound H
2O;[10] it is also the liquid phase of H
2O.[11] The other two common states of matter of water are the solid phase, ice, and the gaseous phase, water vapor or steam. The addition or removal of heat can cause phase transitions: freezing (water to ice), melting (ice to water), vaporization (water to vapor), condensation (vapor to water), sublimation (ice to vapor) and deposition (vapor to ice).[12]
Density
Water differs from most liquids in that it becomes less dense as it freezes.[14] In 1 atm pressure, it reaches its maximum density of 1,000 kg/m3 (62.43 lb/cu ft) at 3.98 °C (39.16 °F).[15] The density of ice is 917 kg/m3 (57.25 lb/cu ft), an expansion of 9%.[16][17] This expansion can exert enormous pressure, bursting pipes and cracking rocks (see Frost weathering).[18]
In a lake or ocean, water at 4°C sinks to the bottom and ice forms on the surface, floating on the liquid water. This ice insulates the water below, preventing it from freezing solid. Without this protection, most aquatic organisms would perish during the winter.[19]
Phase transitions
At a pressure of one atmosphere (atm), ice melts or water freezes at 0 °C (32 °F) and water boils or vapor condenses at 100 °C (212 °F). However, even below the boiling point, water can change to vapor at its surface by evaporation (vaporization throughout the liquid is known as boiling). Sublimation and deposition also occur on surfaces.[12] For example, frost is deposited on cold surfaces while snowflakes form by deposition on an aerosol particle or ice nucleus.[20] In the process of freeze-drying, a food is frozen and then stored at low pressure so the ice on its surface sublimates.[21]
The melting and boiling points depend on pressure. A good approximation for the rate of change of the melting temperature with pressure is given b
where {\displaystyle v_{\text{L}}}{\displaystyle v_{\text{L}}} and {\displaystyle v_{\text{G}}}{\displaystyle v_{\text{G}}} are the molar volumes of the liquid and gas phases, and {\displaystyle L_{\text{f}}}{\displaystyle L_{\text{f}}} is the molar latent heat of melting. In most substances, the volume increases when melting occurs, so the melting temperature increases with pressure. However, because ice is less dense than water, the melting temperature decreases.[13] In glaciers, pressure melting can occur under sufficiently thick volumes of ice, resulting in subglacial lakes.[22][23]
The Clausius-Clapeyron relation also applies to the boiling point, except now the vapor phase has a much lower density than the liquid phase, so the boiling point increases with pressure.[24] Water can remain in a liquid state at high temperatures in the deep ocean or underground. For example, temperatures exceed 205 °C (401 °F) in Old Faithful, a geyser in Yellowstone National Park.[25] In hydrothermal vents, the temperature can exceed 400 °C (752 °F).[26]
At sea level, the boiling point of water is 100 °C (212 °F). As atmospheric pressure decreases with altitude, the boiling point decreases by 1 °C every 274 meters. High-altitude cooking takes longer than sea-level cooking. For example, at 1,524 metres (5,000 ft), cooking time must be increased by a fourth to achieve the desired result.[27] (Conversely, a pressure cooker can be used to decrease cooking times by raising the boiling temperature.[28]) In a vacuum, water will boil at room temperature.[29]
Triple and critical points
Phase diagram of water simplified
On a pressure/temperature phase diagram (see figure), there are curves separating solid from vapor, vapor from liquid, and liquid from solid. These meet at a single point called the triple point, where all three phases can coexist. The triple point is at a temperature of 273.16 K (0.01 °C) and a pressure of 611.657 pascals (0.00604 atm);[30] it is the lowest pressure at which liquid water can exist. Until 2019, the triple point was used to define the Kelvin temperature scale.[31][32]
The water/vapor phase curve terminates at 647.096 K (373.946 °C; 705.103 °F) and 22.064 megapascals (3,200.1 psi; 217.75 atm).[33] This is known as the critical point. At higher temperatures and pressures the liquid and vapor phases form a continuous phase called a supercritical fluid. It can be gradually compressed or expanded between gas-like and liquid-like densities, its properties (which are quite different from those of ambient water) are sensitive to density. For example, for suitable pressures and temperatures it can mix freely with nonpolar compounds, including most organic compounds. This makes it useful in a variety of applications including high-temperature electrochemistry and as an ecologically benign solvent or catalyst in chemical reactions involving organic compounds. In Earth's mantle, it acts as a solvent during mineral formation, dissolution and deposition.</p></div>
<div class="lwrdiv">
<h1> java script</h1><p>The most important factor that affects the student life is the value of time. Being a student we should do everything on time as it never waits for anyone. Obeying one’s parents and teachers and respecting and loving one’s elders are the great virtues of a student. Another important part of a student’s life is his/her social life. A student must have good discipline and he/she must be co-operative with everyone. Social life influences our character in many ways.
Many students enter college expecting good times, friendship and a good sense of direction. They soon find out that colleges come with challenges and struggles because of the great demands and expectations that are put on the importance of education. Students experience a great deal of stress many times. Thus, it is very important for them to manage a proper routine and stick to it.
Student life is the best part of an individual’s life. At this time our main task is to study. We should stop thinking of anything else and concentrate on education. Education must be given the top priority.JavaScript (/ˈdʒɑːvəˌskrɪpt/),[6] often abbreviated as JS, is a programming language that conforms to the ECMAScript specification.[7] JavaScript is high-level, often just-in-time compiled, and multi-paradigm. It has curly-bracket syntax, dynamic typing, prototype-based object-orientation, and first-class functions.
Alongside HTML and CSS, JavaScript is one of the core technologies of the World Wide Web.[8] JavaScript enables interactive web pages and is an essential part of web applications. The vast majority of websites use it for client-side page behavior,[9] and all major web browsers have a dedicated JavaScript engine to execute it.
As a multi-paradigm language, JavaScript supports event-driven, functional, and imperative programming styles. It has application programming interfaces (APIs) for working with text, dates, regular expressions, standard data structures, and the Document Object Model (DOM). However, the language itself does not include any input/output (I/O), such as networking, storage, or graphics facilities, as the host environment (usually a web browser) provides those APIs.
JavaScript engines were originally used only in web browsers, but they are now embedded in some servers, usually via Node.js. They are also embedded in a variety of applications created with frameworks such as Electron and Cordova.
Although there are similarities between JavaScript and Java, including language name, syntax, and respective standard libraries, the two languages are distinct and differ greatly in design.</p></div>
<h1 style="color:blue;">topics</h1>
<ol "color type-"a">
<li>c language</li>
<li> cpp </li>
<li> css</li></ol>
<h1 style ="color:blue;">then next unorder list</h1>
<ul style ="list-style-type: disc">
<li>hello</li>
<li> apple</li>
<li> mango</li>
</ul></div>
<h1 style ="color:blue;" >then next unorder list</h1>
<ul style ="list-style-type: circle">
<li>hello</li>
<li> apple</li>
<li> mango</li>
<ol type-"1">
<ol type-"a">
<li><a href ="http://www.davv.com"/>
ram</a></li>
<li><a href ="http://www.google.com"/>
sita</a> </li>
<li><a href ="http://www.chrome.com">ram</a></li>
</body>
</html>