Sound waves
The speed of sound is ___.
343m/s in air
Sound pitches are ___ in the direction a source is moving.
The lowest frequency standing wave that resonates in some boundaries is called ___.
the fundamental
The speed of light is ___.
3.00 * 108m/s
The lowest frequency / energy EM radiation is ___.
radio waves
pitch
Sound wavelengths are ___ in the direction a source moves.
compressed / shortened
Frequencies that form standing waves / resonate in some boundaries are called ___.
harmonics
Light frequencies / wavelengths determine their ___.
color
The highest frequency / energy EM radiation is ___.
gamma rays
Sound amplitudes determine their ___.
loudness
If a car rapidly approaches and passes your by, the pitch you hear from it will ___.
decrease / drop
Standing waves have nodes: points where the wave never ___.
oscillates / displaces
Light amplitudes determine their ___.
brightness
The 7 bands of the visible spectrum are ___ (in ascending order of frequency).
red, orange, yellow, green, blue, indigo, and violet
Sound waves fit in the ___ and ___ categories.
mechanical and longitudinal
A F1 car's engine is rotating the crankshaft at 300Hz, but you hear it at 240Hz, so the car must be ___.
receding / driving away from you.
Tuning an instrument's strings changes the harmonics by changing ___ (which variable) in the equation for their frequencies?
v (speed)
Light waves fit in the ___ and ___ categories.
nonmechanical and transverse
The portions of the spectrum that are just outside the visible portion are ___ and ___.
infrared and ultraviolet
The human audible spectrum is about ___ to ___ Hz.
20 to 20,000
What happens to sounds' wavelengths when a source is approaching at Mach 1?
They become 0.
The frequencies of overtones are always ___ of the fundamental.
multiples
The human visible spectrum is about ___ to ___nm.
380 to 780 (400 to 800)
We use ___ waves for wireless data through Internet, cellular, and Bluetooth signals.
microwave