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Physics I Lesson Three

Warm up : - How many years does it take to “Tick Off” 1 BILLION (10 9 ) Seconds?. Physics I Lesson Three. Homework: Come up with YOUR VALUES and complete the Drake Equation Read Study Guide Pg 23 Begin YOUR SUMMARY SHEET Page 24 Problem #’s 31-45 Odd

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Physics I Lesson Three

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  1. Warm up: -How many years does it take to “Tick Off” 1 BILLION (109 ) Seconds? Physics ILesson Three Homework: Come up with YOUR VALUES and complete the Drake Equation Read Study Guide Pg 23 Begin YOUR SUMMARY SHEET Page 24 Problem #’s 31-45 Odd If the Earth is 1.496 X 1011 meters from the sun, traveling in a circle around the Sun. How fast is the Earth moving through space? In m/s? In Miles per hour? 100,000 meters per 62miles. 3.600 X 103seconds/hr Objectives: Define: Precision and Accuracy And Life in the Universe Review Unit Conversion and Dimensional Analysis

  2. Preview • Split Page Notes Introduction Chapter 1 • Read Summary Pg 23 • Significant Digits (Pg 7) Scientific Notation • Accuracy Vs Precision: Targets pg 12-13

  3. Lesson 3 A Objectives: - Estimation - Deductive Reasoning - Insight - Are we Alone? Warm Up: If the Earth is 1.496 X 1011 meters from the sun, traveling in a circle around the Sun. How fast is the Earth moving through space in m/s? In miles per hour {mph}?100,000.0 meters per 62.00miles. 3.600 X 103 seconds /hr Homework: Come up with YOUR VALUES and complete the Drake Equation Read Study Guide Pg 23 Begin YOUR SUMMARY SHEET Page 24 Problem #’s 31-45 Odd

  4. Warm Up: If the Earth is 1.496 X 1011 meters from the sun, traveling in a circle around the Sun. How fast is the Earth moving through space in m/s? In miles per hour {mph}?100,000.0 meters per 62 miles. 3.600 X 103 seconds /hr • Velocity = distance / time • Distance = 2πr = 2π {1.496 X 1011meters} • = 9.3996 X 1011 meters • Time = 365.26 days • = 31.56 X 1011sec • Velocity • = 9.3996 X 1011 meters / 31.56 X 1011sec • = 2.978 3X 1011 meters / sec • [2.9783X 1011 meters / sec] * [3600 sec/hr] *[62 miles/100,000.0 meters] • = 6.675 46X 104 mph

  5. Drakes Equation: Is there life out there? Drakes Equation = Nint = Nstars* Fpl * Np * Fl * Fil* Fatc Where: Nint = Number of advanced technical civilizations (Capable of radio astronomy)   Nstars= Number of Stars in the Galaxy Fpl = Fraction of stars that have planets around them Np = Number of planets “suitable’ for Life to arise Fl = Fraction of Suitable planets that life ACTUALLY arises Fil= Fraction of those planets that life actually arises, that develops into “intelligent life” Fatc= Fraction of a planetary lifetime “Graced” by the Advanced Technical Civilization http://www.pbs.org/wgbh/nova/origins/drak-flash.html

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