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PHYS 1010 Week 1 Notes

by: HaleyG

PHYS 1010 Week 1 Notes PHYS 1010-01

Marketplace > Tulane University > Physics 2 > PHYS 1010-01 > PHYS 1010 Week 1 Notes
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About this Document

Lecture notes
Great Ideas in Science & Tech
Timothy Schuler
Class Notes
Physics, Great Ideas in Science and Technology, Schuler




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This 2 page Class Notes was uploaded by HaleyG on Friday January 15, 2016. The Class Notes belongs to PHYS 1010-01 at Tulane University taught by Timothy Schuler in Fall 2016. Since its upload, it has received 91 views. For similar materials see Great Ideas in Science & Tech in Physics 2 at Tulane University.


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Date Created: 01/15/16
PHYS 1010 Notes Week 1 Jan 11­15 ­ Scientific Method ­ Prediction, testing, and revision ­ Formally identify problem ­ Hypothesis is generated as a solution ­ Hypothesis is used to predict results of an experiment ­ Experiment is controlled so there are no false positives ­ Repeated experiments verify or nullify the hypothesis ­ Hypothesis is revised and prediction and testing is repeated ­ Refining a hypothesis leads to a simpler overall theory ­ "Code of ethics" to ensure the results are true ­ Scientists must publish the results and details for peer review ­ Theory: a well­tested group of hypotheses from a large body of information ­ It is impossible to completely prove a theory/test every possible situation ­ Repeatedly verified theories sometimes are called laws ­ Laws are considered the foundations of the theories within a field ­ Theories change over time ­ Bottom­up method: science starts with evidence and facts and builds on those to  create eventual theories ­ Scientific Terms ­ Each physical quantity has a "unit" to use ­ Physics uses the metric system, defined by a system called SI ­ SI has seven fundamental units: length ­ meter; time ­ second;  mass ­ kilogram; temperature ­ kelvin; amount ­ mole; electric current ­ ampere; light ­  candela ­ Units used for other quantities are defined in relation to these base units  and are "derived" from these units ­ Length ­ Meter (m) ­ Originally defined as one ten­millionth of the distance from the equator  to the North Pole ­ Now defined as the distance light travels in 1/2,99,792,458 seconds ­ The US unit is yard (yd), which is 0.9144 meters ­ Time ­ Second (s) ­ Defined as the time it takes for a specific amount of vibrations of  Cesium­133 atoms to occur ­ US unit is the same as the SI unit  ­ Mass ­ Kilogram (kg) ­ Defined as 1/12 the mass of a Carbon­12 atom ­ US doesn't have a unit of mass, uses force instead in pounds (lbs) ­ Scientific Notation ­ Describes extremely large or small numbers ­ Shortens the length of written numbers by expressing non­significant  digits as powers of ten ­ SI system uses stander prefixes to denote the power ten associated with a measurement in scientific notation ­ Correct scientific notation contains a number between 1.0 and 9.9  multiplied by a power of ten ­ Significant figures ­ Significant figures show the precision of a measurement ­ The number of significant figures in a measurement must be taken into account  when performing math


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