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English Guide: Practical Tips for Better English Communication

article thumbnail   In a recent article, we wrote about the difference between improve and improvise and how to use these two similar terms appropriately. Continuing this series on using similar-sounding English words correctly, let us consider the use of the words “affect” and “effect”.  Both terms  mean “impact” or “result” of something, but their usage  varies depending on the context in which they are being used.     Affect The word “affect” is generally used in the...
article thumbnail English language has plenty of words that seem very similar but mean very different. It is quite easy to ignore the subtle difference in the words themselves and consider them to mean the same thing. This results in incorrect usage of the words when writing or speaking in English, which may confuse the listener or create a negative impression about your English Communication skills. Let’s focus on two words, improve and improvise; the former is a...
article thumbnail Someone has rightly said, “In the mundane, nothing is sacred. In sacredness, nothing is mundane.” Mundane is boring. There comes a time when you feel saturated with the routine tasks you are doing and you feel like doing different and challenging things. Your ardent desire to take up additional work and prove your worth overwhelms you. But this needs to be communicated effectively to your boss. Your boss should be aware that you are geared up...
article thumbnail Gratitude is of vital importance in human life. We need to thank people who have, directly or indirectly, explicitly or implicitly, made a positive change in our life. ‘Thank You’ is the least that we can say. So never shy away from that. In professional life too, gratefulness is of utmost importance, especially when someone has helped you climb up the career ladder.       It’s your promotion party and you have to give a thank you speech – this...
article thumbnail   We all have encountered situations wherein there were unavoidable or unforeseen circumstances because of which we had to extend our leave. For example, sickness, family issues, marriage etc. Now here comes the uncomfortable question – how to ask the boss for a leave extension. Quite tricky, huh?     When you are already on leave and then you have to request for extension of leave, it should be done in such a way that it is granted without much...
article thumbnail A few months back, a video of a job prospect venting out his frustrations on having to speak in English at job interviews, went viral. The protagonist of the video, a youngster, who could speak English fluently was angry that he was always asked to speak in English, and he let out his frustration with a series of expletives in Hindi. The fact that the video went viral and was shared by a large audience in the country, especially among...
article thumbnail Man is a social animal. We cannot survive in isolation. Also, we all crave for love and attention, no denying that. We are constantly expanding our social network. Be it personal or professional life, networking is of utmost importance to us: Social networking, for getting love and affection, and professional networking for career enhancement.       In this competitive world, we cannot lounge around waiting for opportunities to knock at our door. We...
article thumbnail Someone has rightly said, “Good conversation starts with good listening”. Our teachers have often told us that we wouldn’t learn anything new from talking but we will definitely learn something new from listening. How true! There’s a lot of buzz about spoken English these days, but people tend to forget that English listening is also an integral and inseparable part of English communication, which cannot be overlooked.No wonder then the...
article thumbnail India is undergoing a digital revolution. The country has embarked on the ‘Digital India’ movement that has been officially promoted by the Indian government. It is therefore not surprising to see a jump in career opportunities in the field of digital marketing, especially search engine marketing (SEM). This field attracts a lot of freshers and young job aspirants. Having good English skills will enable a person to take advantage of the growing...
article thumbnail Good manners will open doors that the best education cannot.” Etiquette is the science of living. It embraces everything.People all over the world are judged, liked, disliked, remembered or looked down with contempt based on their manners. Good manners speak a lot about your personality.       It is imperative that you display your best behaviour when you are in a public place especially when eating out.  When you walk into a restaurant you don’t want to...
article thumbnail Good teamwork is essential not only for the growth of any organisation but also for the personal growth of individuals in the organisation. An essential component of achieving good team bonding is when team members express positive thoughts about fellow team members to them directly.  Sincere compliments and praise go a long way in making a person feel good and feel motivated to perform better for the team and the organisation.     There are a...
article thumbnail At the outset, let us state that we hope you never have to apply for a compassionate leave. However, the reality is that most of us, at some stage of our life, end up having to request for such leaves. This article is written to specifically help you in case of such an eventuality.     Before we get into the mechanics of applying for compassionate leave, let us first understand what is compassionate leave. It is leave granted to an employee upon death...
article thumbnail The use of idioms in regular communication serves to add more ‘colour’ to the communication and makes it more interesting and engaging. Therefore, it is quite common to see the usage of lots of English idioms, especially sports-related idioms, in any office communication. As a young professional, adapting yourself to an office environment, it will help to not only be familiar with some of the common idioms but also learn to use them in your...
article thumbnail The Indian IT & ITES industry has been one of the major employers of the young, educated workforce in the last two-three decades. The demand for qualified manpower in this sector with diverse technical skills continues to be high. Many IT professionals therefore believe that their technical skills such as programming will be good enough to give them a good and long, successful career. This is far from the truth. Excellent English communication skills...
article thumbnail This is another article written specifically to help visitors to our blog avoid some common grammar mistakes and improve their spoken English skills. In this piece, we will focus on a common mistake that we keep hearing and reading from so many English speakers these days: the use of “one of the….” in sentences.   To start with, let us take some examples of the type of sentences that you may come across in everyday conversation. Pay specific...
blackboard Two important aspects of any language are the grammar and the vocabulary. While you focus on improving your English vocabulary, it is also important to ensure that you work on grammar as well.The truth is that grammar is the foundation and the building block for becoming proficient in English, while vocabulary lends beauty to the language.It is also true that fixing grammar issues is more challenging than building on your vocabulary. So, the...
english-can-may An important aspect of communication between any two individuals is seeking and obtaining permission to carry out any specific activity or task. Right from our childhood and school days, we have been taught to ask permission from our parents or teachers, whether this is to take or do something. Whether you will be successful in getting the permission, depends on the way you ask. Here are some key considerations to bear in mind. Be polite when you...
Welcome speech When you join a new office, it is likely that you will be given a formal or informal welcome. Depending on the size of the organisation, this may involve small or large groups of colleagues, including your managers.  The purpose of these welcome meetings is to speed up your ‘integration’ into the organisation by acquainting yourself with colleagues and the work they do. It is also to ease your nerves, make you comfortable and feel welcome into the...
article thumbnail The size of your vocabulary is one of the indicators of your command of the language. Having a large vocabulary does not automatically guarantee that one is a good communicator- because the appropriate usage of the vocabulary is even more important- but it certainly helps to have it than not. The reasons are not too difficult to understand. A big English vocabulary is empowering because it gives the freedom to use different words at appropriate times....
report by LinkedIn The nature of work is changing, and pretty fast at that! The pace of adoption of digital technologies is such that one can be rendered obsolete very quickly. Artificial intelligence and machine learning are taking over a lot of functions that previously relied on human beings, and very few professions can be considered immune to the conquest by technology. This raises serious questions on what skills will keep professionals valuable to their...
Learn-to-speak-up-in-office-meetings ‘If you just communicate, you can get by. But if you communicate skilfully, you can work miracles’. Office meetings provide a great platform for an employee to make oneself visible and be heard. The success of any meeting lies in the effectiveness of the ideas communicated. Thus it becomes imperative that you should speak effectively and make people take note of you. These meetings should be viewed as an opportunity to showcase your abilities....
IELTS IELTS examination is a near-mandatory doorway that people, planning to study or work overseas in countries where the main language of communication is English,have to get through. Similar to an entrance test for certain professional courses or government institutions, the IELTS test aims to determine the proficiency of candidates in the English language. The evaluators use this test to identify different facets of English communication amongst...
funny idioms Idioms make a sentence feel lively. When you use idioms in a sentence, it adds a humorous element and make you look like a native speaker. Native speakers use more idioms and phrases in order improve their English communication skills. Knowing the correct meaning and proper usage can make you a pro in the English language.Idioms are figurative in nature and cannot be considered literal. In today’s blog, we will explain funny idioms that one must...
English idioms for office As you get used to working in a company, chances are that you will often encounter idioms (phrases whose meanings are not obviously based on the individual words used) from your peers or bosses. Many of these are so overused that they have become clichés, but it is important that you understand these to get a clear idea of the context of the statement. While there are countless idioms that may be used in the workplace, let us just touch upon...
Sports Idioms Work is, in many ways, like sports. The ups and downs, the winning and losing, the planning and preparation, the execution and the myriad emotions- they all mirror what happens on a playing field. In fact, some career experts suggest that one should treat our jobs as a game we love, and work will be so much more enjoyable, productive and fulfilling. No wonder we have so many idioms in the English language that are related to sports. While these...

Kinetic Theory of Gases

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Introduction to Kinetic Theory of Gases

kinetictheoryofgases1A Scottish botanist, Robert Brown, first suggested that gases were in a state of random motion. His model of the physics of gases, which describes the behavior of an ideal gas, portrays them much like a group of billiard balls moving on a billiard table. He observed that pollen particles seem to jiggle about for no apparent reason.

We see the same thing when observing smoke particles under a microscope. The random jerky movement of the particles is called Brownian motion and is due to their continuous and random bombardment by air molecules. The work of Einstein, Maxwell, and Boltzmann gave us the kinetic theory, as we know it today.
 
Temperature and pressure are macroscopic properties of gases. These properties are related to molecular motion, which is a microscopic phenomenon. The kinetic theory of gases correlates macroscopic properties and microscopic phenomena. Kinetics means the study of motion, and in this case, the motion of gas molecules. 
 

Main Postulates of the Kinetic Molecular Theory of Gases:

  • A gas consists of very small microscopic particles called “molecules.” Depending on the nature of the gas, each gas molecule can consist of an atom or group of atoms. Molecules are in continuous motion. 
  • All the molecules of a gas are in a stable state and are considered identical. 
  • Any finite volume of a gas consists of a very large number of molecules. 
  • At S.T.P. there are 3 x 1025 molecules in a cubic meter. 
  • Compared to their own dimensions, the molecules are wide apart from each other. 
  • The diameter of a molecule is about 3 x 10-10 meters. 
  • Gas molecules move in straight lines in all possible directions (i.e., they randomly move) at various speeds. 
  • Gas molecules collide with each other and with the walls of containers. Their collisions are perfectly elastic in nature. 
  • When gas molecules collide with the walls of a container, they transfer their momentum, which appears as the pressure of gas. 
  • The molecules of an ideal gas exert no force of attraction or repulsion on one another except during collision. 
  • The average kinetic energy of gas molecules is directly proportional to absolute temperature. 
  • At a given temperature, the molecules of all gases have the same kinetic energy. 
  • Newtonian mechanics is applicable to molecular motion.

     

Temperature

The kinetic theory explains why temperature should be a measure of the average kinetic energy of molecules. According to the kinetic theory, any given molecule has a certain mass, m; a certain velocity, v; and a kinetic energy of 1/ 2 mv2. As we said, molecules in any system move at a wide variety of different velocities, but the average of these velocities reflects the total amount of energy in that system.
 
We know from experience that substances are solids at lower temperatures, while liquids and gases are substances at higher temperatures. This accords with our definition of temperature as average kinetic energy; because the molecules in gases and liquids have more freedom of movement, they have a higher average velocity.

 

Pressure

In the kinetic-molecular theory of gases, pressure is the force exerted against the wall of a container by the continual collision of molecules against it. In physics, pressure, P, is the measure of the force exerted over a certain area. We generally say that something exerts a lot of pressure on an object if it exerts a great amount of force on that object, and if that force is exerted over a small area. Mathematically:
 
kinetictheoryofgases2
Pressure is measured in units of pascals (Pa), where 1 Pa = 1 N/m2. 
Pressure comes into play whenever force is exerted on a certain area, but is a particularly important characteristic of gases. Molecules are assumed to rebound elastically, with no kinetic energy lost in perpendicular collision. Therefore, ∆v = v - (-v) = 2v (see figure below). If a molecule is moving perpendicular to a wall, then it will strike the opposite parallel wall, rebound, and return to strike the original wall again. If the length of the container or distance between the two walls is the path length l, then the time between two successive collisions on the same wall will be ∆t = 2l/v. Therefore, the continuous force that a molecule moving perpendicular to a wall exerts is:
kinetictheoryofgases3Change in momentum as a particle hits a wall

kinetictheoryofgases4
 
The molecules in a sample of gas are not, of course, all moving perpendicularly to a wall. However, the components of their actual movement can be imagined to be along the three mutually perpendicular x, y, and z axes. If the number of molecules moving randomly, N, is large, then on the average, one-third can be assumed to exert their force along each of the three perpendicular axes. The square of the average velocity along each axis, v2(x), v2(y), or v2(z), will then be one-third of the square of the average total velocity v2:
 
v2(x)= v2(y)= v2(z)= v2/3
 
The average or mean of the square of the total velocity can replace the square of the perpendicular velocity. Therefore, for a large number of molecules N
 
F= (N/3) mv2/l
 
Consequently, the pressure will be given by 
 kinetictheoryofgases5
(since P = F/A)

 
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