Chpt 1 & 2 Flashcards
Study of matter and energy and the interactions between them
Physics
3 fundamental units of physics
Length meters
Mass kg
Time seconds
Anything that occupies space
Matter
The amount or quantity of matter
Mass
The force that gravity is pulling on mass
Weight
What can change and what can’t change?
Mass never changes
Weight can change
The ability to do work
Energy
What will result from the expenditure of energy
Work
Ability to do work by virtue of position (stored)
potential Energy
Energy of motion
Kinetic energy
The result of the action, machines, or physical movement (what two energies combined?)
Mechanical
(Potential & Kinetic)
The energy released during a chemical reaction
Chemical Energy
The movement of electrons through an electrical potential
Electrical Energy
The energy of motion at a molecular level (heat)
Thermal Energy
The energy contained in the nucleus of an atom
Nuclear Energy
Results from electric and magnetic disturbances moving through space
Electromagnetic Energy
Law of Conservation of Energy
Energy cannot be created nor destroyed, it can only change forms
(T/F) The sum of all energy and matter in the universe is constant
True
The relationship between matter and energy
E=mc^2
The energy emitted and transferred through space
Radiation
A form of electromagnetic energy, visible light
Electromagnetic radiation
Any kind of radiation that is able to remove an orbital electron from an atom
Ionizing radiation
Occurs when an x-ray passes close enough to an electron of an atom to cause that electron to escape from the atom
Ionization
Newton’s First Law of Motion
Inertia
A body in motion will remain in motion until a force acts upon it
