Introduction to Physics and Thermodynamics Lecture Notes

A comprehensive set of vocabulary flashcards covering basic physics concepts, thermodynamics laws, electromagnetism, optics, and practical applications in safety, work, and leisure.

Physics

The study of matter, energy, motion, force, and their interactions, aiding in the understanding of how the natural world works through observable phenomena.

Heat Transfer

Energy transfer that takes place solely because of a temperature difference; energy moves from a hotter object to a cooler one.

Temperature

A quantitative description of the hotness or coldness of a material that depends on its physical state.

Heat

Refers to energy in transit from one object or system to another because of a temperature difference.

Thermal Equilibrium

A state reached when interacting objects have no more heat exchange and their temperatures become equal.

Conduction

A mechanism of heat transfer that occurs within an object or between two objects in contact.

Convection

A mechanism of heat transfer that depends on the motion of mass from one region of space to another, categorized as forced or free.

Radiation

Heat transfer via electromagnetic radiation that requires no matter to be present in the space between objects.

Thermodynamics

The study of energy transformations involving heat, mechanical work, and other aspects of energy, and how they relate to the properties of matter.

Zeroth Law of Thermodynamics

If two systems are in thermal equilibrium with a third system, they are in thermal equilibrium with each other.

First Law of Thermodynamics

The law of Conservation of Energy stating energy cannot be created or destroyed, only change forms; expressed as $\text{AU} = Q - W$.

Second Law of Thermodynamics

The law of Entropy and Spontaneity stating that the total entropy (disorder) of an isolated system always increases over time.

Third Law of Thermodynamics

The law of Absolute Zero stating that the entropy of a perfect crystal approaches zero as its temperature approaches absolute zero.

Electric charge

A fundamental physical property of matter causing particles to experience a force in an electromagnetic field.

Electromagnetic field

An invisible physical field extending through space produced by stationary and moving electrically charged particles; consists of electric fields (voltage) and magnetic fields (electric current).

Faraday's Law of Electromagnetic Induction

A principle stating that a changing magnetic field induces an electromotive force (EMF) that drives an electric current in a conductor.

Optics

The branch of physics studying the behavior, properties, and manipulation of light and other forms of electromagnetic radiation.

Geometrical Optics (Ray Optics)

A branch treats light as straight-line rays, focusing on how light reflects and refracts through mirrors, lenses, and prisms.

Physical Optics (Wave Optics)

A branch studying wave-like properties of light, including interference, diffraction, and polarization.

Ohm's Law

A fundamental formula relating voltage ($V$), current ($I$), and resistance ($R$).

Power Formula

The formula defined as $P = IV$, where $P$ is power, $I$ is current, and $V$ is voltage.

Evaporation (in Refrigerators)

Process occurring inside the fridge that absorbs heat to cool the interior.

Condensation (in Refrigerators)

Process occurring in the outside coils that releases heat to the surrounding air.

Seatbelts & Airbags (Physics Principle)

Based on Newton's Laws of Motion and Momentum; seatbelts stop sudden forward motion while airbags reduce impact force by slowing the body safely.

Helmets and Protective Gear (Physics Principle)

Based on energy absorption and impact force to protect the body and head from physical harm.

Medical Imaging (Physics Principle)

Uses electromagnetic waves (X-rays), magnetism and radio waves (MRI), or sound waves (Ultrasound) to diagnose or monitor health.

Smoke Detectors (Physics Principle)

Based on ionization and light scattering where smoke particles interrupt electrical current or light beams to sound an alarm.

Computers and Communication Technology (Physics Basis)

Based on electricity and electronic circuits using electrical signals to process, store, and send information.

Elevator (Physics Principle)

Based on force, motion, and pulleys using motors to move vertically inside buildings.

Conveyor Belts (Physics Principle)

Based on mechanical motion and energy transfer to transport products efficiently.

Tractors and Machines (Physics Principle)

Based on energy conversion and motion, converting fuel or electrical energy into mechanical motion for heavy tasks.

Factory Automation (Physics Principle)

Utilizes machines, electricity, and automation systems to perform repetitive tasks with speed and accuracy.

Roller Coaster (Physics Behind)

Based on gravity, kinetic energy, potential energy, and motion; potential energy shifts to kinetic energy as it descends.

Basketball (Physics Behind)

Based on projectile motion, force, and gravity; gravity pulls the ball down in a curved path after force is applied.

Sound System/Speakers (Physics Behind)

Based on sound waves and vibration; electrical signals cause vibrations that create the sound waves we hear.