Examlex
A solution is 2.25% by weight NaHCO3.How many grams of NaHCO3 are in 150.0 g of solution?
Eardrum
A thin membrane in the ear that vibrates in response to sound waves, thereby transmitting sound to the inner ear.
Sound Waves
Sounds that move through air or a different substance and become audible when they arrive at a person's or animal's eardrum.
Frequencies
The rate at which a vibration occurs that constitutes a wave, either in a material (as in sound waves) or in an electromagnetic field (as in radio waves and light), usually measured in hertz.
Hz
Hertz, a unit of frequency in the International System of Units (SI) that measures the number of cycles per second of any periodic event.
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