1. TASK: How do I calculate the speed of an electron? Task: What is the speed of the electron with kinetic energy of 1eV? My (incorrect) calculation: Wk = 1eV mass of an electron = 9.1 x 10 kg ------------------------------ ----------------- calculated using the equation: Wk = (mv ) / 2 Result: v = 1.4 x 10 m / s> the speed of light (c = 3 x 10 m / s) So .... WRONG! _____________________________________ TASK 2: How elektronvoltov measured average translational propanol kinetic energy of molecules at 20 C? This does not even understand, let alone know how to calculate ... Thanks for the help. lp Tasko Posts: 36 Joined: 3/10/2008 9:49
1) I conclude that you completely ignored all units and overlooked the fact that the electron is not joules. 2) thermal translational energy: (likely to know the form of gas, by weight, instead of one particle:). In more detail: each square link in the energy of the molecule contributes to the average energy due to thermal motion (ekviparticijsko principle). In three dimensions propanol you own the translational part of the kinetic energy - three articles. Aniviller Posts: 7263 Joined: 15.11.2004 18:16
Task 1: Obviously you ill pretend J. eV in 1 eV = 1.6 * 10 ^ (- 19) J. Task 2: What a nice by: http://hyperphysics.phy-astr.gsu.edu/hbase/thermo /temper.html#c1 shrink propanol Posts: 9699 Joined: 4/9/2004 17:45
1) Wow, what a slip. Ok, this is then resolved. 2) Even this we are now clear. This is, as it looks like a mistake professor? Below is an electron with kinetic energy 10 eV (after conversion: 1.6 x 10 J). We are interested propanol in re-particle velocity, which occurs after the famous equation v = 6 x 10 m / s, which of course can not be right. propanol Seems to have given too high electron propanol kinetic energy (maybe it was meant 10 eV, which comes in = 600 m / s) When this task, I light the question of what is the highest (real) kinetic energy of the electron and how much a minimum, the electron is stationary (ie, 0 eV -> v = 0)? Thank you. lp Tasko Posts: 36 Joined: 3/10/2008 9:49
Tasko wrote / s: 1) Wow, what a slip. Ok, this is then resolved. 2) Even this we are now clear. This is, as it looks like a mistake professor? Below is an electron with kinetic energy 10 eV (after propanol conversion: 1.6 x 10 J). We are interested in re-particle velocity, which occurs after the famous equation v = 6 x 10 m / s, which of course can not be right. Seems to have given too high electron kinetic energy (maybe it was meant 10 eV, which comes in = 600 m / s) When this task, I light the question of what is the highest (real) kinetic energy of the electron and how much a minimum, the electron is located? Thank you. lp Eh, no, at higher energies it is necessary to take into account the relativistic correction: http://hyperphysics.phy-astr.gsu.edu/hbase/relativ/releng.html#c6 (first propanol link) shrink Posts: 9699 Joined: 04/09/2004 17:45
Return to School playground Jump to: Select a forum ------------------ Questions & Answers About the history of time, space and even around the world about the Moon Fire, water, earth, air Live load faster, propanol higher, stronger What holds the world together? Questions for Einstein X-Files propanol From zero to infinity Power of Pure Reason Science in the kitchen Heaven and Earth science Kvarkaflanc in the news, books and movies school playground Doing science at home and abroad Tenders event notifications Cool Websites New Books All other information on the work and job About Cartography cities Kvarkadabrine books articles Comments criticisms and compliments International Science Debates chat Who is online
Powered by phpBB 2000, 2002, 2005, 2007 phpBB Group.
No comments:
Post a Comment