Uncertainty Calculator vs IELTS Collocation PRO

Uncertainty Calculator evaluates the error propagation throughout the mathematical expressions comprised of variables of uncertain value. The application allows input of up to three value-error pairs (A, B and C), that can be used as a parameters in the final expression. Error values should be provided in absolute (100 +/- 5) or in relative format, the latter should appear in percent format (100 +/- 5%). The evaluated expression can include numerous functions, that provided by row of the appropriate buttons. Components and functions can be added directly to the expression field by pressing the corresponding buttons. To encompass expression into the preset formula, select the expression and press the corresponding formula button. Particular attention should be paid to placing brackets to avoid equation ambiguity. The application deals with independent, random errors. So if this is a case never use A + A, but rather 2*A and never A*A*A but rather A^3! Obviously, different parameters can be combined in any way (A+B or C *A^2 .. is perfectly fine). Angles for trigonometric functions can be provided in degrees or radians, and that should be reflected by setting a yellow button to "DEG" or "RAD". Bear in mind the importance of units in any of calculations! Implementation Examples: 1.The charge passing through an electrical circuit is defined by: Q = I * t, where I is the current and t is the time. Calculate the total charge value when a current of 0.15 ± 0.01 A passes through the circuit for 120 ± 1 s: Input: A = 0.15 ± 0.01, B = 120 ± 1 The final expression will be A*B, and press Calculate: The final value will be: 18 ± 1.2 Thus, it can be reported the total charge as 18 C ± 1 C. Important! One should only report as many significant figures as are consistent with estimated error! So the value should be rounded to the rightmost decimal place at which error applies. 2. A ball is tossed straight up into the air with initial speed vo = (4.0± 0.2) m/s. After a time t = (0.60 ± 10%) s, the height of the ball is h = vo*t - 0.5gt^2 = 0.636 m (g = 9.80 m/s^2). What is the value and uncertainty of height? Input: A = vo = 4.0 ± 0.2, and B = t = 0.60 ± 10%, then the final expression should be: A*B – 0.5*9.8*B^2 The final value will be: 0.6 ± 0.4 (meters).

● IELTS Collocation: Learning collocations are highly recommended - Some of the most important vocabulary needed for IELTS writing are collocations. These are essential when expanding your vocabulary. Basically, collocations are 2 or 3 words that commonly go together and sound just right to a native speaker. For some tips on building your vocabulary take a look at this application. - If you do not know how to use collocations then they will sound or look ‘wrong’ to a native speaker . ● Why are collocations so important? - In the marking criteria in IELTS, you are marked on Lexical Resource (vocabulary). You will be marked on the way you use collocations in the writing section, mainly essays. Here is what it says in the Public Band Descriptors about Writing task 2 Band 7 - Not only are collocations in IELTS important for writing, but they are useful in the speaking test also. They give your speech a smooth natural flow, which if used well, can help you get a Band 7 or more in the speaking test. You have to know how to use them correctly though. ● How do I learn collocations? - When you learn new words you must learn the surrounding words or the matching words that help it collocate. Do not just memorise words on their own. Collocations are like chunks of language and there are various patterns to these. - The best way to learn collocations is through reading, listening and making your own sentences. I advise making a vocabulary book where you write out example sentences. I do not advise making word lists because you must know how collocations work in the surrounding sentence. These also have to be reviewed regularly and put into practice. ● There are quite a few patterns such as: - Verb + Noun - Verb + Adverb - Adjective + Noun - Adverb + Adjective - Noun + Noun - Collocations with ‘have’ or ‘take’ The app is free and support OFFLINE. It'll perfect for English learner.