phys1441-spring08-011608-post

phys1441-spring08-011608-post - PHYS 1441 Section 002...

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Wednesday, Jan. 16, 2008 PHYS 1441-002, Spring 2008 Dr. Jaehoon Yu 1 PHYS 1441 – Section 002 Lecture #2 Wednesday, Jan. 16, 2008 Dr. Jae hoon Yu Brief history of physics Standards and units Uncertainties Significant Figures
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Wednesday, Jan. 16, 2008 PHYS 1441-002, Spring 2008 Dr. Jaehoon Yu 2 Announcements Reading assignment #1: Read and follow through all sections in appendices C, D and E by Tuesday, Jan. 22 – There will be a quiz on Wednesday, Jan. 23, on this reading assignment E-mail list: 16 of you subscribed to the list so far – 5 point extra credit if done by this Friday, Jan. 18 – 3 point extra credit if done by Wednesday, Jan. 23 19 of you have registered for homework roster, of whom 8 submitted homework #1 – Remember that you need to download and submit homework #1 for full credit!! – You need a UT e-ID and password to log-in and download homework – If you don’t have them request e-id on the web http://www.utexas.edu/eid No class next Monday, Jan. 21, Martin Luther King day – But homework#1 is still due 9pm that day
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Wednesday, Jan. 16, 2008 PHYS 1441-002, Spring 2008 Dr. Jaehoon Yu 3 Why do Physics? • To understand nature through experimental observations and measurements ( Research ) • Establish limited number of fundamental laws, usually with mathematical expressions • Predict the nature’s course Theory and Experiment work hand-in-hand Theory works generally under restricted conditions Discrepancies between experimental measurements and theory are good for improvements Improves our everyday lives, though some laws can take a while till we see them amongst us Exp. { Theory {
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Wednesday, Jan. 16, 2008 PHYS 1441-002, Spring 2008 Dr. Jaehoon Yu 4 Models, Theories and Laws • Models : An analogy or a mental image of a phenomena in terms of something we are familiar with – Often provide insights for new experiments and ideas • Theories : More systematically improved version of models – Can provide quantitative predictions that are testable and more precise • Laws
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This note was uploaded on 10/21/2009 for the course PHYS phys1441 taught by Professor Dr.jhaehoonyou during the Spring '08 term at UT Arlington.

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phys1441-spring08-011608-post - PHYS 1441 Section 002...

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