Sound
moving faster than the speed of sound
supersonic
process by which waves bounce off or return by striking a surface
reflection
A rope and pulley system that uses more than one pulley
block and tackle
nuclear reaction in which nuclei are combined together
shift in frequency of a wave that is emitted from a source that is moving with respect to the observer
doppler effect
process by which a wave loses energy to a material as it passes through it
absorption
pivot point or center of rotation for a lever
fulcrum
A scientific instrument that produces a beam of coherent light
laser
unit for calculating atomic energy levels
electron volt (eV)
unit of power or amplitude that scales logarithmically, or by powers of 10
decibel
type of wave in which the oscillations are perpendicular to the wave’s direction of motion
transverse wave
force applied to a machine
input force
An instrument that pops every time a radioactive particle passes through it
Geiger counter
type of light emission by a material where there is a delay between the absorption and re-emission of the light
phosphorescence
perceived frequency of sound
pitch
property of waves that describes how waves bend around obstacles and spread out when passing through openings.
diffraction
ratio of the output force to the input force
mechanical advantage
device that transforms the pressure variations in a sound wave into electrical oscillations with the same pattern of variation with time
microphone
unit of measure of the impact of radioactivity on humans
rem
a frequency that is an integer multiple of the fundamental
harmonic
occurs when two or more waves, of the same phase, add together to create a larger wave
constructive interference
field of science to study how various parts of the body move
biomechanics
A device for converting sound waves in air into electrical signals
spectrograph
standard unit of measure for expressing the mass of an atom
atomic mass unit (amu)