Question
Classify the following into true solutions and colloidal solutions:
Ink, Salt solution, Starch solution, Blood, Sugar solution.
Ink, Salt solution, Starch solution, Blood, Sugar solution.
True Solutions: Salt solution and sugar solution.
Colloidal Solution: Starch solution, Ink, Blood.
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A person has a hearing range from 20Hz to 20kHz. What are the typical wavelengths of sound waves in air corresponding to these two frequencies? Take the speed of sound in air as 344ms–1 .
What type of energy is possessed:

