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Welcome to Physics!!!

Welcome to Physics!!!. Physics is. The most mathematical of all the sciences The study of the Universe on all levels (Particles less than 10 -16 to greater than 10 24 in the Cosmos) What Physicists Do?. Why Study Science?. To solve fundamental problems Understand our future world

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Welcome to Physics!!!

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  1. Welcome to Physics!!!

  2. Physics is The most mathematical of all the sciences The study of the Universe on all levels (Particles less than 10-16 to greater than 1024 in the Cosmos) What Physicists Do?

  3. Why Study Science? To solve fundamental problems Understand our future world Improve quality of life Physics is Phun!

  4. Mechanics The Study of Motion and its causes : Newton's Laws of Motion Mechanics are understood in basic units of measurements of length, mass, and time. Measurements in Metrics (SI = International System of Units)

  5. Measurements

  6. Scientific Notation 2.37 X 107 m Unit 0 < y < 10 (minimum 2 places behind decimal) Power of Ten EE EXP Button on Calculator or The calculator will be your best friend in physics. Never forget it!!!! Especially on Test day!!!

  7. Rules for Scientific Notation Calculations Addition and Subtraction Must have same exponents Must have the same units Ex. a) 5 x 107m + 3 x 107m = ________ b) 6.2 x 10-3m – 2.8 x 10-3m = ________

  8. Multiplication Add exponents Treat units as products Ex. a) (3 x 106m)(2 x 103m) = _________ b) (2 x 10-5m)(4 x 109m) = ________ c) (4 x 103kg)(5 x 1011kg) = ________ d) (4 x 103kg)(5 x 1011m) = ________

  9. Division Subtract exponents Carry units or cancel out when possible Ex. a) 8 x 106m = ________ m/sec 2 x 103sec b) 8 x 106kg = ________ kg/m 2 x 104m c) 9 x 106m2 = ________ m 4.5 x 107m

  10. Powers Multiply exponents Square or cube the number and measurements (units) Ex. a) (3 x 102m)2 = ________ b) (2 x 102m)3 = ________

  11. Products of variables in Formulas (Length)(Length) = Area (m2 or cm2) (Length)(Length)(Length) or (Length)(Width)(Height) = Volume (m3 or cm3) Length = Distance = d = Speed or Velocity time time t Units:(km/hr or m/sec) mass = Density (g/ml or g/cm3) Volume

  12. Conversion Review Use conversion factors like fractions! Ex. 55mi = ? km 55mi (1.61km) = hr hrhr ( 1 mi ) Ex. 55mi = ? m 55mi (1 hr) (1610 m) = hr sec hr (3600 sec) (1 mi) Ex. How many cm3 in a qt? 1Qt (.986 L)(1000 ml)(1cm3) = (1 qt) (1L) (1ml)

  13. Examples Ex. If a cylinder has a radius of 156 mm and a length of 8.7cm, How many m3 does it contain?

  14. => Any variable in an algebraic formula can be replaced by a number and its units. This makes the quantities in formulas become real – world measurements. => Any variable in a formula can be isolated: Formula Rearrangement Ex. D = m D v = mV = m v D

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