Semester Test Flashcards
Doppler Effect
The apparent change in frequency of a wave as the source moves in relation to the observer
Resonance
When an object is struck by a wave that matches it’s natural frequency the object will vibrate
Electromagnetic spectrum
Radio waves, micro waves, inferred, visible light, ultra violet, x-rays, gamma rays
Current
Continuous flow of electrons, measured in ampers
Voltage
The difference in electrical potential in a circuit measured in volts
Resistance
Opposition to the flow of a current
Ohms law
V=I•R
What are the different types of circuits?
Series and parallel
What is a series circuit
Only 1 continuous path for the electricity to travel
What is parallel circuit
Multiple paths
What are the facts against resistance
Diameter D^ R
Length is down resistance is up
Temp. Is down resistance is down
Type of wire
Dalton?
First modern atomic theory
Thomson
Discovered the electron
Rutherford
“Gold fail experiment”
Discovered the nucleus of a atom
Chadwick
Discovered the neutron
Proton
The mass of 1 a.m.u
Represented as p+
# of protons = the atomic #
Determined identity of an element
Neutron
Mass slightly a greater than 1 a.m.u
Represented as n
# p+ = atomic mass
# n determines some properties of an element BUT not the identity
Electron
Mass of 1/1806 a.m.u Represented by e- in an Nuteral atom #p+= # e- in an ion #e =#p in charge Determined how elements interact w/ other elements
Ions
Atoms w/ a charge
Valence electrons
The outermost e- is an atoms that are involved in bonding
Ionic bonds
Electrons are taking by the non metals from the metal
Covalent
2 or more non metals
Isotopes
Atoms of the same element w/ different atomic masses + different propentney
Diatomic elements
BrINICIHOF
