Physics as long as Scientists in addition to Engineers Physics Classical Physics Classical Physics, cont Modern Physics

Physics as long as Scientists in addition to Engineers Physics Classical Physics Classical Physics, cont Modern Physics www.phwiki.com

Physics as long as Scientists in addition to Engineers Physics Classical Physics Classical Physics, cont Modern Physics

Shuster, Fred, Federal Courts Reporter has reference to this Academic Journal, PHwiki organized this Journal Physics as long as Scientists in addition to Engineers Introduction in addition to Chapter 1 Physics Fundamental Science concerned with the basic principles of the Universe foundation of other physical sciences Divided into five major areas Classical Mechanics Relativity Thermodynamics Electromagnetism Optics Quantum Mechanics Classical Physics Mechanics in addition to electromagnetism are basic to all other branches of classical physics Classical physics developed be as long as e 1900 Our study will start with Classical Mechanics Also called Newtonian Mechanics

ECPI University-Virginia Beach Health Sciences VA www.phwiki.com

This Particular University is Related to this Particular Journal

Classical Physics, cont Includes Mechanics Major developments by Newton, in addition to continuing through the latter part of the 19th century Thermodynamics Optics Electromagnetism All of these were not developed until the latter part of the 19th century Modern Physics Began near the end of the 19th century Phenomena that could not be explained by classical physics Includes theories of relativity in addition to quantum mechanics Classical Mechanics Today Still important in many disciplines Wide range of phenomena that can be explained with classical mechanics Many basic principles carry over into other phenomena Conservation Laws also apply directly to other areas

Objective of Physics To find the limited number of fundamental laws that govern natural phenomena To use these laws to develop theories that can predict the results of future experiments Express the laws in the language of mathematics Theory in addition to Experiments Should complement each other When a discrepancy occurs, theory may be modified Theory may apply to limited conditions Example: Newtonian Mechanics is confined to objects traveling slowing with respect to the speed of light Try to develop a more general theory Quantities Used In mechanics, three basic quantities are used Length Mass Time Will also use derived quantities These are other quantities can be expressed in terms of these

St in addition to ards of Quantities St in addition to ardized systems agreed upon by some authority, usually a governmental body SI – Systéme International agreed to in 1960 by an international committee main system used in this text Length Units SI – meter, m Defined in terms of a meter – the distance traveled by light in a vacuum during a given time See Table 1.1 as long as some examples of lengths Mass Units SI – kilogram, kg Defined in terms of a kilogram, based on a specific cylinder kept at the International Bureau of St in addition to ards See Table 1.2 as long as masses of various objects

St in addition to ard Kilogram Time Units seconds, s Defined in terms of the oscillation of radiation from a cesium atom See Table 1.3 as long as some approximate time intervals Number Notation When writing out numbers with many digits, spacing in groups of three will be used No commas Examples: 25 100 5.123 456 789 12

Reasonableness of Results When solving a problem, you need to check your answer to see if it seems reasonable Reviewing the tables of approximate values as long as length, mass, in addition to time will help you test as long as reasonableness Systems of Measurements, cont US Customary everyday units Length is measured in feet Time is measured in seconds Mass is measured in slugs often uses weight, in pounds, instead of mass as a fundamental quantity Prefixes Prefixes correspond to powers of 10 Each prefix has a specific name Each prefix has a specific abbreviation

Prefixes, cont. The prefixes can be used with any base units They are multipliers of the base unit Examples: 1 mm = 10-3 m 1 mg = 10-3 g Model Building A model is a system of physical components Identify the components Make predictions about the behavior of the system The predictions will be based on interactions among the components in addition to /or Based on the interactions between the components in addition to the environment Models of Matter Some Greeks thought matter is made of atoms JJ Thomson (1897) found electrons in addition to showed atoms had structure Ruther as long as d (1911) central nucleus surrounded by electrons

Models of Matter, cont Nucleus has structure, containing protons in addition to neutrons Number of protons gives atomic number Number of protons in addition to neutrons gives mass number Protons in addition to neutrons are made up of quarks Modeling Technique Important technique is to build a model as long as a problem Identify a system of physical components as long as the problem Make predictions of the behavior of the system based on the interactions among the components in addition to /or the components in addition to the environment Density Density is an example of a derived quantity It is defined as mass per unit volume Units are kg/m3 See table 1.5 as long as some density values

Shuster, Fred City News Service Federal Courts Reporter www.phwiki.com

Atomic Mass The atomic mass is the total number of protons in addition to neutrons in the element Can be measured in atomic mass units, u 1 u = 1.6605387 x 10-27 kg Basic Quantities in addition to Their Dimension Dimension has a specific meaning – it denotes the physical nature of a quantity Dimensions are denoted with square brackets Length [L] Mass [M] Time [T] Dimensional Analysis Technique to check the correctness of an equation or to assist in deriving an equation Dimensions (length, mass, time, combinations) can be treated as algebraic quantities add, subtract, multiply, divide Both sides of equation must have the same dimensions

Dimensional Analysis, cont. Cannot give numerical factors: this is its limitation Dimensions of some common quantities are given below Symbols The symbol used in an equation is not necessarily the symbol used as long as its dimension Some quantities have one symbol used consistently For example, time is t virtually all the time Some quantities have many symbols used, depending upon the specific situation For example, lengths may be x, y, z, r, d, h, etc. Dimensional Analysis, example Given the equation: x = ½ at 2 Check dimensions on each side: The T2’s cancel, leaving L as long as the dimensions of each side The equation is dimensionally correct There are no dimensions as long as the constant

Rounding Last retained digit is increased by 1 if the last digit dropped is 5 or above Last retained digit remains as it is if the last digit dropped is less than 5 If the last digit dropped is equal to 5, the retained digit should be rounded to the nearest even number Saving rounding until the final result will help eliminate accumulation of errors

Shuster, Fred Federal Courts Reporter

Shuster, Fred is from United States and they belong to City News Service and they are from  Los Angeles, United States got related to this Particular Journal. and Shuster, Fred deal with the subjects like Federal Government and Politics; US Supreme Court

Journal Ratings by ECPI University-Virginia Beach Health Sciences

This Particular Journal got reviewed and rated by ECPI University-Virginia Beach Health Sciences and short form of this particular Institution is VA and gave this Journal an Excellent Rating.