Term Test 1 Flashcards
Scalar
A physical property is defined by its value (magnitude) and unit
Mass, density, pressure, speed, energy, work
Vector
A physical property is defined by both its magnitude and direction along with a unit
Velocity, force, momentum, acceleration
Heat
Is a form of energy that gives atoms and molecules increase movement or KE
Measured in J
High to low
Sound
Is a longitudinal wave
Is a form of a mechanical wave
Pressure fluctuation
Period (T)
T is the time to undergo one complete cycle
Is related to frequency T=1/f
The higher the frequency the smaller the period
Interference
When a waveform has the same frequency but different phase
Waveforms in phase
Same phase
Interfere constructively
Greater amplitude
Wave forms out of phase
Different phase
Interfere destructively
Lesser amplitude
Longitudinal waves
Vibration occurs in the same direction as the direction of wave travel
Sound waves
People moving in a line
Transverse waves
Vibrations occur perpendicular to the direction of the wave travel
Electromagnetic waves (light, xrays)
Stadium waves
Waves on a rope
Water waves
Electromagnetic radiation
Electromagnetic energy is transmitted by both on electric field and magnetic. Field oscillating together as a transverse wave
Travel at the speed of light
Behaves as both partial photons and waves
a
X
z. n
A: atomic mass (sum of protons and neutrons
Z: atomic number (# of protons)
N: the number of neutrons
Bremsstralung radiation
When high energy electron approaching a heavy nucleus, they change direction
A direction change Meade acceleration which means a change in KE
“Breaking” radiation
Filtration & collimators
Stop low energy X-rays and shape the beam
What are some non SI units
eV mmHg g/cm3 Ci erg um A
