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Transcript
PHYS 1111
Mechanics, Waves, & Thermodynamics
 Prerequisites: MATH 1090 (Trigonometry)**** or
MATH 1113, also familiarity with college Algebra,
Geometry, and Basic Chemistry
 Course is NOT for physical science majors (PHYS 1211)
 Introduction to Newtonian mechanics, wave motion,
and thermodynamics
Aims of course:
- teach you the fundamental principles/laws of physics
- teach you how to apply these principles to practical
problem solving (useful in other fields)
A Building-Up of Principles
Algebra -> geometry -> trigonometry-> kinematics ->
forces -> work/energy -> … -> thermodynamics
-> … -> electricity/magnetism -> optics -> …
What is Physics?
Definition: the science that deals with matter and energy
in terms of motion and force
Operational definition: given some experimental observation, a theory is developed to describe it. The theory
is then used to make predictions, which are then
tested with further experiments or observations.
The Classification of Physics
Classical Physics
- everyday speeds and
sizes (Newton, …)
Quantum Physics
- very small (Dirac, …)
Relativistic Physics
- Very fast (Einstein, …)
Relativistic Quantum
Physics – very small and
very fast (Feynman, …)
Chapter 1: The Basics
Things you should already know or will need to learn
about:
1. Units: SI will be used (mostly), British units will be
used occasionally (foot, pound…)
2. Significant figures (covered in lab)
3. Dimensional analysis
4. Order-of-magnitude estimates
Vectors and Scalars (From Chap. 3)
Physical Quantities:
1. Scalar – a quantity that can be completely specified
by a single number or magnitude (and units); e.g.,
temperature, mass, speed (70 mph), energy, …
2. Vector – a quantity which has both a magnitude
and a direction (and units); e.g., force, velocity,
N
displacement, …
v=70 mph
Physical quantities have explicit
definitions
=5
E
v=70 mph, 5 N of E