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## chapter 1summary

by: Jennifer Notetaker

22

0

2

# chapter 1summary PHYS2070

Jennifer Notetaker
Toledo
GPA 3.0
General Physics I
Dr. Scott Lee

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This is basically the summary1st chapter of college physics, which is the text i use in class. Hope it helps :)
COURSE
General Physics I
PROF.
Dr. Scott Lee
TYPE
Class Notes
PAGES
2
WORDS
KARMA
25 ?

## Popular in Natural Sciences and Mathematics

This 2 page Class Notes was uploaded by Jennifer Notetaker on Wednesday August 26, 2015. The Class Notes belongs to PHYS2070 at University of Toledo taught by Dr. Scott Lee in Summer 2015. Since its upload, it has received 22 views. For similar materials see General Physics I in Natural Sciences and Mathematics at University of Toledo.

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Date Created: 08/26/15
Jennifer Egbo Chapter 1 Summary Recitation 3 This chapter discussed various topics It rst discussed the standards of Length Mass and Time For length it informed the text talked about the history of how the legal standard of length became the 39meter in France 1799 which is what we use today The SI unit of mass is 39kilograms This is actually gotten from the mass of a particular platinumiridium aoy cylinder kept in France at the International Bureau of Weights and Measures Mass is used to measure the resistance of an object to the change in movement of an object The basic unit of time is 39seconds It is derived from the high precision of an atomic clock Furthermore this chapter also talked about the building blocks of matter and how matter is made up of atoms An atom is made up of protons neutrons and electrons The protons positively charged and neutrons neutral make up the nucleus of an atom which is positively charged while the electrons orbit around the nucleus and are negatively charged Very strong evidence has been found concerning protons neutrons and a lot of other exotic particles Evidence shows that these particles are made up of six particles caed Quarks These quarks have different names up down strange charm bottom and top Dimensional Analysis was also discussed in this chapter Dimension shows the physical nature of quantities such as the dimension of length which is the distance between two points Length Mass and Time all have dimensions denoted by these symbols L M and T respectively Mathematical expressions are analyzed using dimensional analysis In physics it is always important to make methods of determining the accuracy of measurements because all measurements depend on various factors such as how sensitive the instrument is how skied the person handling the apparatus is with measurements and the number of times the measurement is repeated In physics during calculations it is sometimes essential to convert units from one system to another to better apply them to inconvenient situations The text states that units can be used as algebraic quantities that can cancel each other out By making fractions we can cancel the units we don t want from the given conversions Also when calculating it is always useful to make approximate answer to determine if a more precise calculation is needed and it is also faster and serves as a partial check Knowing the approximate value of a quantity within a factor of about 10 is useful for many problems This value is called an Order of Magnitude and is achieved by nding the exponent of 10 that is nearest to the actual value of the quantity The coordinate system and trigonometry are also used in physics for calculating particular questions A coordinate system is used to specify locations in space usually on graphs Trigonometry is usually used to calculate problems concerning right angled triangles The trigonometric functions de ned by a right angled triangle are the ratios of the length of sides of the triangle which are sine sin cosine cos and tangent tan functions Lastly in general physics it is always important for students to develop a useful learning technique to assist and enhance their problem solving skills Having an organized method to solving problems will drastically enhance the understanding of various concepts

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