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Course Name: (Applied Physics) Symbol and number: 2305 Phys Languish of course : English

Course Name: (Applied Physics) Symbol and number: 2305 Phys Languish of course : English Text book: ( Physics for Scientists and Engineers) Author: Raymond A. Serway, College Publishing ISBN 0-03-015654-8. Dr. Mohamed Alqahtani. Email: mbalqahtani@ksu.edu.sa. COURSE SYLLABUS :.

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Course Name: (Applied Physics) Symbol and number: 2305 Phys Languish of course : English

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  1. Course Name: (Applied Physics) Symbol and number: 2305 Phys Languish of course : English Text book: (Physics for Scientists and Engineers) Author: Raymond A. Serway, College Publishing ISBN 0-03-015654-8 Dr. Mohamed Alqahtani Email: mbalqahtani@ksu.edu.sa

  2. COURSE SYLLABUS:

  3. Evaluation

  4. Chapter 1Basic physical concepts Units and dimensional analysis. Physical quantizes , Vectors , Vectors addition, Vector multiplication )

  5. 1.Units and Dimensional Analysis Any quantity that we can measure by measuring tool and express as number is called Physical Quantities We use many quantities in everyday life as: Length – Mass – Time – temperature – Current- Voltage – Power- velocity – etc

  6. 2. Physical quantities are divided into: I- basic or fundamentals quantities They can not be expressed in terms of other quantities

  7. II- Derived Quantities • Are quantities which expressed in terms of the fundamental quantities as: • Velocity (v) = length / Time • = L / T • = m / s. • 2. Acceleration (a)= Velocity / Time • = (L/T)/ T • = L/T2 • = m / s2 • 3. Density (D) = mass/volume • = M / V • = kg /m3

  8. 4. Force F = mass x acceleration = ma = M (L/T2) = kg.m/s2 = Newton III- Dimensionless Quantities ( with no units) as: 1- refractive index (n) 2- constant Pi () 3- Atomic weight (M)

  9. Physical Quantities also classified into : • Scalar Quantity: defined by number only • like mass- length- time- density • Vector Quantity: • defined by number and direction • like magnetic force, weight To measure any quantities there are two requirements: 1- we must have a measuring instrument (direct or indirect) 2- we must have a system unit of measurements

  10. There two types of units 1-Gauss Unit (cgs) Length (cm)- mass (gram) - Time (s) 2- System International (SI) Length (m)- mass (kg) - Time (s) In physics, we deal with quantities which are very small to very large from 10-18 to 1028

  11. Largest smallest

  12. A vectors has magnitude as well as direction Vector symbol Properties of Vectors Components of Vector A 2. Magnitude and direction of vector A Example1 Find the two components of vector A Ax = A cos = 10 cos 60 = 5 Ay = A sin  = 10 sin 60 = 8.66 3. Vectors A A 10 60

  13. Vectors in three directions Vector components Vector magnitude Example 2 Vector A= 4i+2j-4k, find the magnitude IAI? Sol: Ax=4, Ay= 2, Az=-4 and the magnitude

  14. vector added to vector equal vector By drawing If and = (Ax+Bx)i + (Ay+By)j + (Az+Bz)k Example: vector A= 3i+5j+2k and vector B= -i+2j-k = (+3-1)i +(+5+2)j + (+2-1) K = 2i + 7j+k 4. Adding Vectors

  15. 5. Vector product • Scalar product • A•B=IAIIBI Cos • changes from • 0o to 90o • If A and B are parallel • i.e = 0 , Cos 0=1 •  A•B=IAIIBI 1 • If A and B are perpendicular • i.e =90 , Cos 0=0 • A•B=0 2 • Vector product • AxB=IAIIBI sin • changesfrom • 0o to 90o • If A and B are parallel • i.e  =0 , sin 0=0 • AxB = 0 1 • If A and B are perpendicular • i.e  =90 , sin90=1 •  AxB=IAIIBI 2

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