but hey if I get the speed and uncertainty of the weather changes in some calculation? not true? To

Sections Home What is Physics? Physics Forums Blogs Books Dictionaries Collection problems and competitions Challenge Latex USSR Editorial Humor Other Software for Physical About ... For classical mechanics and statistical thermodynamics branch Electromagnetism Relativity perkin elmer Quantum Fluids and Mathematical Methods Astronomy Physics Optics Particle Physics continuum state solid everyday Advanced Physics Physics History of Physics ByLevel Secondary Dissemination Initiation perkin elmer Advanced First cycle Second cycle Chuletarios Items By Type Notes Works eBooks Software Lab Forum Calendar perkin elmer Club Albums Member List Forum Actions perkin elmer Mark Forums Read Quick Links View Team Forum Blogs New Clubs
To start viewing messages, select the forum that you want to visit to see all the threads and messages it contains. However, to participate on the page, you must register by completing perkin elmer the registration form.
Hello guys, I have a small technical perkin elmer question, there are some criteria for the approximation of the slope and its uncertainty when done by linear regression? is that the accounts are fairly made in the process and very confusing at the end do the analysis. Example The data table shown below belongs to the movement performed by a mobile. Constructing perkin elmer the graph the speed versus time and determining perkin elmer the acceleration of the mobile with their corresponding error. perkin elmer
T (s) V (m / s) 1 5.7 2 6.4 3 8.6 4 9.7 5 11.8 6 13.2 7 14.2 8 16.3 9 17.3 using minimal adjustment squares (linear regression) I get the following expression v = 1.51333 * t + 3.9 where the acceleration would correspond to the slope. then using these two formulas where Sm is the uncertainty of the slope, I get the following result the problem comes when report data with their respective significant figures, I find it quite difficult to know where I have to bring up in the book the answer is but do not know how or criteria used to make this rounding. and it is very difficult to look at the operations that are many. And I have another small question in the case where the uncertainties give me time and speed, as this affects the end calculation of uncertainty? Thank you! Last edited by Alex2007; 06/14/2014 at 00:08:30.
Hi Alex. At first you have to operate with all digits calculator that offers you to avoid rounding errors. Once you have the result with all decimal, plays it closer. The criteria used always seems to be this: The error takes only one significant figure (if the first significant digit is 1, can take two numbers), then the result value is taken with decimals sufficient for the last digit matches the error. That is to say, in your case, first you have to, and as you have two decimals (in the appropriate units), you have to get two decimal places in the value of (and in the same units). If the error you had gone, for example, perkin elmer you would have to put
Uashhhhhhhh clear and everything has meaning roughly sos rightly when uncertainty in other years gave me 0.14421 perkin elmer leave her in double figures, thank you very much --- Update --- but hey if I give the uncertainty of the speed and time something changes in the calculation? not true?
but hey if I get the speed and uncertainty of the weather changes in some calculation? not true? To calculate perkin elmer the uncertainty of the acceleration (slope) no. But if you want to calculate the uncertainty of the intercept, does depend on the error associated with the y-coordinate (in this case the speed). Regards
Shortcuts experimental Physics Top Site Areas Options Private Messages Subscriptions Who's perkin elmer Online perkin elmer Home Search forums Standards perkin elmer Bulletin Board Secretariat and tips for using the forum The classroom orientation Newtonian Mechanics perkin elmer Theoretical Mechanics Thermodynamics and Statistical Physics Electromagnetism Relativity and Quantum Fluids cosmology and quantum theory of continuous media fields, nuclear physics and particle physics Advanced Miscellaneous Astronomy and Astrophysics Physics Optics Physics experimental solid state physics history and illustrious characters Units and dimensional analysis Physics Olympiads Problems Olympic Philosophy of Science Teaching and Learning Physics Physics Science Daily Porn Movie review and personal experiences Experiments Methods Mathematical Calculation vectors, linear algebra and geometry Differential Equations Probability and Statistics Computer Methods TeX / LaTeX Biology Other sciences Engineering Environmental Science Chemistry Classroom Chemistry perkin elmer Physical Chemistry Analytical Chemistry Organic Chemistry Inorganic Chemical Engineering Problems