Sound Waves
What is the threshold of hearing?
The lowest (quietest) point at which a person can hear
Why do we see the colors we see?
Certain materials absorb some color and reflect the color you see
The distance from crest to crest or trough to trough:
Wavelength
Which is an example of a mechanical wave?
Earthquake
What is the base provider of energy for the food chain?
The Sun
How does Ultrasound work?
The echoes of very high frequency waves are used to produce computerized images
When a wave loses energy as it transmits into a material it is called:
Absorption
The lowest point of a wave is called:
Trough
What is an example of an electromagnetic wave?
Light wave
Throw everything you know of efficiency out the window. Suddenly machines can have efficiencies of over 1. You are utilizing this new miracle machine. You put in 1500 joules of effort and it produces an out of 3000 joules. What is the efficiency?
200%
What do sound waves need that light waves do not?
A medium
The bending of waves as they pass from one medium into another is called:
Refraction
What is the difference between compressions and rarefactions:
Compressions are packed closely together, where as rarefactions are areas of waves stretched apart
Ocean waves are an example of a:
Surface wave
Perpetual Motion Machines currently exist
False
What causes sound waves?
Vibrations
True or False: The only difference between a reflection at a fixed boundary and reflection at a free boundary is that a reflection at a free boundary flips upside down, instead of just opposite.
True
What do we call the part of the Electromagnetic Spectrum that we can see?
The Visible Spectrum
Sound waves are an example of a:
Longitudinal Wave
What is energy, as per our slides?
The ability to do work
What happens as the intensity of the sound increases?
The loudness increases
The combining of two or more waves of the same frequency that results in a single wave is called:
Superposition
What do we call the sideways S shaped wave?
Sine Wave
Light waves are an example of a:
Transverse Wave
What happens to the kinetic energy of particles as they increase in temperature (Hint: They heat up)?
Kinetic energy increases