1 SCI190 The Physical Universe John E. Erdei Department of Physics.

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Presentation transcript:

1 SCI190 The Physical Universe John E. Erdei Department of Physics

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5 Untethered EVA Approximately 200 mi above the surface of the earth

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7 There is only ONE event being shown on the overhead Why were there multiple answers???

8 Untethered EVA Approximately 200 mi above the surface of the earth

9 Untethered EVA Approximately 200 mi above the surface of the earth Is the person is the spacesuit a good person or a bad person?

10 Why is this guy connected to all this stuff?

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12 Philosopher: Lover of Wisdom

13 Philosopher: Lover of Wisdom

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16 Thales: Nature can be explained without the intervention of the gods. Physics – Greek Philosophy

17 Thales: Nature can be explained without the intervention of the gods. Anaxagoras: Experimentation required to understand nature. Physics – Greek Philosophy

18 Thales: Nature can be explained without the intervention of the gods. Anaxagoras: Experimentation required to understand nature. Aristotle: Method of detailed reasoning. Physics – Greek Philosophy

19 Thales: Nature can be explained without the intervention of the gods. Anaxagoras: Experimentation required to understand nature. Aristotle: Method of detailed reasoning. Democritus: Physical Laws Physics – Greek Philosophy

20 Thales: Nature can be explained without the intervention of the gods. Anaxagoras: Experimentation required to understand nature. Aristotle: Method of detailed reasoning. Democritus: Physical Laws Pathagoras:Mathematics is appropriate. Physics – Greek Philosophy

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23 Galileo ( ) Physics – Science Revived

24 Galileo ( ) * Nature operates with precision. Physics – Science Revived

25 Galileo ( ) * Nature operates with precision. * Laws of Nature must be stated unambiguously and must reflect the precision of Nature. Physics – Science Revived

26 Galileo ( ) * Nature operates with precision. * Laws of Nature must be stated unambiguously and must reflect the precision of Nature. * Language used must be precise. Physics – Science Revived

27 Galileo ( ) * Nature operates with precision. * Laws of Nature must be stated unambiguously and must reflect the precision of Nature. * Language used must be precise. Scientists (Physicists) must be bi-lingual Physics – Science Revived

28 Galileo ( ) * Nature operates with precision. * Laws of Nature must be stated unambiguously and must reflect the precision of Nature. * Language used must be precise. Scientists (Physicists) must be bi-lingual * Words (ambiguous) Physics – Science Revived

29 Galileo ( ) * Nature operates with precision. * Laws of Nature must be stated unambiguously and must reflect the precision of Nature. * Language used must be precise. Scientists (Physicists) must be bi-lingual * Words (ambiguous) * Mathematics (Precise) Physics – Science Revived

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31 Nature Operates in accordance with Mechanical Laws - Thales, Democritus, Galileo, Newton Physics – Science Revived

32 Nature Operates in accordance with Mechanical Laws - Thales, Democritus, Galileo, Newton Physics – Science Revived

33 Nature Operates in accordance with Mechanical Laws - Thales, Democritus, Galileo, Newton Physics – Science Revived

34 Nature Operates in accordance with Mechanical Laws - Thales, Democritus, Galileo, Newton Physics – Science Revived

35 Experimentation is Required - Anaxagoras, Bacon Physics – Science Revived

36 Experimentation is Required - Anaxagoras, Bacon Physics – Science Revived

37 A particular process of reasoning must be used in order to effectively uncover the properties of nature - Aristotle, Galileo Physics – Science Revived

38 A particular process of reasoning must be used in order to effectively uncover the properties of nature - Aristotle, Galileo Physics – Science Revived

39 Mathematics the an appropriate language - Pythagoras, Galileo Physics – Science Revived

40 Mathematics the an appropriate language - Pythagoras, Galileo Physics – Science Revived

41 Mathematics the an appropriate language - Pythagoras, Galileo Physics – Science Revived

42 Mathematics the an appropriate language - Pythagoras, Galileo Physics – Science Revived

43 Mathematics the an appropriate language - Pythagoras, Galileo Physics – Science Revived We need to be able to “talk” to nature, and the language of nature appears to be mathematics

44 Implications Physics – The Present

45 Implications * Nature can be understood (Maxwell’s Demon) Physics – The Present

46 Implications * Nature can be understood (Maxwell’s Demon) * Laws of Nature do not change Physics – The Present

47 Implications * Nature can be understood (Maxwell’s Demon) * Laws of Nature do not change * Nature is predictable (Newton’s well ordered universe) Physics – The Present

48 What is Physics? Physics – The Present

49 What is Physics? Physics is the “Legislative Branch” of the Sciences Physics – The Present

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51 What are you here to Learn?

52 What are you here to Learn? Understand the past

53 What are you here to Learn? Understand the past

54 What are you here to Learn? Understand the past

55 What are you here to Learn? Understand the past Doppler shift – Color (light) determined by wavelength (in meters).

56 What are you here to Learn? Understand the past Doppler shift – Color (light) determined by wavelength (in meters). If the source of the light is moving, the wavelength (or color) will “shift” by an amount determined by the speed of the source.

57 What are you here to Learn? Understand the past Doppler shift – Color (light) determined by wavelength (in meters). If the source of the light is moving, the wavelength (or color) will “shift” by an amount determined by the speed of the source. Can provide information about astronomical systems far away from the earth.

58 What are you here to Learn? Understand the past Understand the Present

59 What are you here to Learn? Understand the past Understand the Present

60 What are you here to Learn? Understand the past Predict the Future Understand the Present

61 What are you here to Learn? Understand the past Predict the Future Understand the Present

62 What are you NOT here to Learn?

63 Untethered EVA Approximately 200 mi above the surface of the earth Is the person is the spacesuit a good person or a bad person? What are you NOT here to Learn?