Physics in Daily Life Notes

Physics explores the physical universe from subatomic particles to galaxies through observable and unified laws.
A primary concept is the order and simplicity of nature, exemplified by the Law of Conservation of Energy (energy changes forms but is never created or destroyed).
Nature demonstrates aerodynamic efficiency, such as Canada geese flying in a V-formation to reduce drag and save $20\% - 30\%$ in energy.
This module is for Philippine Christian University Sampaloc $1$ , Dasmariñas City for the $2026-2027$ school year, Grade $11$ .

Chemical Energy: Energy stored in chemical bonds, released or absorbed during particle changes.
Electrical Energy: Flow of negatively charged electrons in a circuit.
Energy: A quantitative property transferred to objects to perform work.
Kinetic Energy: Energy associated with an object's motion.
Light Energy: Electromagnetic waves experienced typically as heat.
Mechanical Energy: Energy from the mechanical movement of objects.
Potential Energy: Stored energy that can transform into kinetic energy.
Sound Energy: Mechanical energy produced by vibrations traveling as longitudinal waves.

Household Activities: Appliances convert electrical energy into mechanical, heat, or sound energy; the Philippine standard is $220\,V$ .
Heat Transfer in Cooking: Involves Conduction (direct contact), Convection (fluid movement), and Radiation (electromagnetic waves).
Friction: Essential for cleaning tasks and preventing slips, though excessive friction can cause damage.

Inertia and Safety: Seatbelts counteract inertia, which is the tendency of objects in motion to stay in motion.
Corrective Lenses: Convex lenses treat farsightedness; concave lenses treat nearsightedness.
Medical Imaging: Uses wave principles such as X\text{-rays}, Ultrasound, MRI (magnetic fields), and PET scans (radiopharmaceuticals).
Work Productivity: Simple and compound machines reduce human effort; Ergonomics applies physics to spinal alignment and pressure distribution.
Computing: Transistors act as switches for electrical signals, representing information as bits ( $1$ s and $0$ s).
Dr. Gladys West: A pioneer whose foundational algorithms for GPS (Global Positioning System) translate physics into daily tools.

Sports Dynamics: Athletes like Stephen Curry utilize projectile motion (parabolic paths), momentum, and force to optimize basketball performance.
Sound Systems: Convert electrical energy into sound waves for amplification.
Roller Coasters: Utilize the transformation of potential energy into kinetic energy, alongside gravity, centripetal force, and G\text{-forces}.

How does physics improve safety in everyday life?
Which area benefits the most from physics: Household activities, health and safety, work productivity, or leisure? Why do you think so?
What do these activities have in common?
How is physics involved in these situations?
How does physics make life easier or safer?