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FUNDAMENTALS OF PHYSICS OF RADIATION SCIENCE

FUNDAMENTALS OF PHYSICS OF RADIATION SCIENCE. REVIEW. R or C/KG Ion pair defines electric charge per unit of mass quantity of matter in a physical object is mass . REVIEW. Rad or ? . REVIEW. Rem or ?. Curie or Becqurel (Bq). Quantity of Radioactive material . Physics.

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FUNDAMENTALS OF PHYSICS OF RADIATION SCIENCE

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  1. FUNDAMENTALS OF PHYSICS OF RADIATION SCIENCE

  2. REVIEW • R or C/KG • Ion pair • defines electric charge per unit of mass • quantity of matter in a physical object is mass

  3. REVIEW Rad or ?

  4. REVIEW Rem or ?

  5. Curie or Becqurel (Bq) Quantity of Radioactive material

  6. Physics • Removes subjectivity • Simplifies (No… really!) • Base quantities (mass, length and time)(pg 29) • Derived Quantities (combination of the base quantities • Special quantities-support measurement of the derived quantities

  7. Units • Magnitude 100 or 72 • Units cm. or inches

  8. MKS CGS BRITISH SI Meter/kilogram/second centimeter/gram/second feet/pound/second extension of MKS +derived units and special units to represent derived quantities and special quantities SYSTEMS OF MEASUREMENTS

  9. MECHANICS • OBJECTS AT REST (STATIC) • OBJECTS IN MOTION (DYNAMIC) • MOTION—VELOCITY AND ACCELERATION. What is the difference? • Initial velocity, final velocity. • If velocity is constant the acceleration is zero!!!

  10. Newton’s Laws of Motion • Inertia • Force • For every action there is an equal and opposite reaction

  11. WEIGHT • Force of an object by gravity • Newtons in SI units • Pounds in British • weight=mass x gravity

  12. MOMENTUM • MASS x Velocity • Truck rolling down the hill vs skateboarder rolling down the hill • Which will have more momentum? Why?

  13. WORK/POWER • PRODUCE OF FORCE AND DISTANCE • UNIT IS JOULE • Power- rate of doing work (includes time) • A radiographer picks up (force)a cassette and places into the bucky(distance) in 3 seconds (time). This

  14. ENERGY • The ability to do work • May be transformed from one form to another but cannot be created or destroyed. • Mechanical energies used in x-rays: • Kinetic and potential

  15. HEAT • IMPORTANT IN RADIOLOGY. WHY? • HEAT IS KINETIC ENERGY. WHY? • UNIT OF MEASUREMENT-CALORIE • CONDUCTION-HOT TOUCHING COLD • CONVECTION-TRANSFER OF MOLECULES MECHANICALLY • RADIATION-THERMAL

  16. THERMAL RADIATION • TRANSFER OF HEAT BY EMISSION OF INFRARED RADIATION. (REDDISH GLOW) • X-RAY TUBES COOLED PRIMARILY BY RADIATION

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