C1 notes

Course Information

  • Course Title: Physics 1221.100

  • Instructor: Vincent Noireaux, Physics Department

  • Course Structure: In-person class format, subject to change only under specific conditions (e.g. illness).

Overview of Physics

  • Definition: The scientific study of matter and energy and their interactions.

  • Topics Covered This Semester:

    • Mechanics: Movement and the effects of physical forces on objects.

    • Fluids Mechanics: Including buoyancy, pressure, and capillarity.

    • Oscillations, Waves, and Radioactivity: SHM (Simple Harmonic Motion), diffraction, and radiation.

Week 1 Agenda

  • Understanding the scope of Physics 1221, background topics.

  • Chapter 1 Topics: Sections 1.1 to 1.6 will be covered today (Friday).

  • Chapter 2 Topics: Sections 2.1 to 2.3 discussed yesterday.

  • Discussion Session: Scheduled for Sunday.

  • Optional Homework: Mastering Physics HW1 available on Canvas.

Quiz Information

  • Date: Thursday, September 19th from 5:45-6:35 PM (rooms TBA).

  • Practice Quizzes: Available weeks ahead; beneficial for:

    • Practicing problems and multiple-choice questions.

    • Understanding quiz content.

  • Quiz Format: Includes 2 written problems (35 pts each) and 5 MCQs (6 pts each) totaling 100 points.

Chapter 1: Introduction, Measurement, Estimating

Key Sections

  • 1.1: How Science Works

  • 1.2: Models, Theories, and Laws

  • 1.3: Measurement and Uncertainty; Significant Figures

  • 1.4: Units, Standards, and the SI System

  • 1.5: Converting Units

  • 1.6: Order of Magnitude: Rapid Estimating

  • 1.7: Dimensions and Dimensional Analysis

1.1 How Science Works

  • Observation: Essential for forming scientific theories; involves imagination in determining significance.

  • Theories: Developed to explain observations and make predictions.

    • Example: Aristotle vs. Galileo on motion; Galileo's insights lead to fundamental physics principles.

1.2 Models, Theories, and Laws

  • Models: Useful for understanding phenomena—must recognize their limitations.

  • Theory: In-depth and allows for testable predictions.

  • Law: General description of natural behavior across varied circumstances.

  • Principle: Similar to a law but applies to specific phenomena.

1.3 Measurement and Uncertainty; Significant Figures

  • Uncertainty: Inherent in all measurements due to instrument limits; written with a ± sign.

  • Percent Uncertainty: Ratio of uncertainty to measured value multiplied by 100.

  • Significant Figures: Count of reliably known digits affecting the outcome of calculations.

1.4 Units, Standards, and the SI System

  • Key SI Units:

    • Length: Meter (path of light in a vacuum)

    • Time: Second (radiation cycles of cesium atoms)

    • Mass: Kilogram (standard platinum cylinder in Paris)

1.5 Converting Units

  • Conversion Factor Example: 1 in = 2.54 cm; essential for accurate measurement translations.

  • Example Calculation: Converting lengths from inches to centimeters.

1.6 Order of Magnitude: Rapid Estimating

  • Estimation Technique: Round numbers to one significant figure; gives approximate order of magnitude.

    • Example: Seconds in a day calculation.

1.7 Dimensions and Dimensional Analysis

  • Dimensions: Base unit composition expressed in brackets (e.g., speed [L/T]).

  • Dimensional Consistency: Essential in equations; quantities added or equated must share same dimensions.

  • Dimensional Analysis: Checks for correctness in equations (e.g., verifying velocity equation).

In-Class Questions (ICQ)

  • Access Requirements: Smartphone, tablet, or computer for participation via Canvas assignments.

  • Question Format: A, B, C, D, E; numerical equivalent provided for clarity.