Pawan

Yes and No! 1. Yes if you regularly practice and seek help on continuous basis from people (friends, colleagues, teachers etc) who are well versed in English. By saying Yes, I mean that you will be able to start to speak in English. It will take regular practice without any time limit to gain good control over the language. There is not short cut to success. And yes, please do not fall prey to advertising which promise to teach complete English in 7 or 30 days. It should be a gradual process with a blend of practice and guidance. 2. No if you simple read few articles and books on English language and do nothing else.

SI is the International System of Units which is the modern form of the metric system, and is the most widely used system of measurement. The SI is founded on seven SI base units for seven base quantities assumed to be mutually independent which are length, mass, time, electric current, thermodynamic temperature, amount of substance and luminous intensity. Other quantities, called derived quantities, are defined in terms of the seven base quantities via a system of quantity equations.

Centrifugal force describes the tendency of an object following a curved path to fly outwards, away from the center of the curve. It's not really a force; it results from inertia — the tendency of an object to resist any change in its state of rest or motion. Centripetal force is a real force that counteracts the centrifugal force and prevents the object from "flying out," keeping it moving instead with a uniform speed along a circular path.

Abstract from: http://study.com/academy/lesson/distance-and-displacement-in-physics-definition-and-examples.html Distance is how much ground is covered by an object, regardless of its starting or ending position. There is no directional component to a distance measurement, making it a scalar quantity. So, during my 5K, I ran 5 kilometers total. It doesn't matter where the starting line or finish line were or in which direction I was running. It only matters that, if you trace and measure my path, I covered a distance of 5 km of ground. So, when we asked the other runners how far I had traveled, they all answered correctly with a distance measurement of 5 kilometers. Let's take a minute to look at our other term: displacement, which is an object's change in position considering its starting position and final position. A displacement measurement does not take into account what route the object took to change position, only where it started and where it ended. It is easiest to picture displacement by locating where the object started and drawing a straight arrow from this point to the point where the object stopped moving. Remember, in physics this arrow is called a vector. Its length corresponds to the magnitude, or size, of the movement, and the arrow points in the direction of travel. This makes displacement a vector quantity because it incorporates both movement magnitude and direction.