ANSWER;
Why do musical instruments that play similar tones sounds differently?
-because the harmonic overtones and envelope of each instrument is unique. When a frequency is played, other frequencies, called harmonics, are created. Each instrument has a unique harmonic character. The duration of the notes, or envelope, played on different instruments also varies widely.
How thermos bottle minimizes heat transfer?
-A vacuum flask, or thermos, does not allow heat transfer by any of the three ways that heat can travel. The silver coating on the inner bottle prevents heat transfer by radiation, and the vacuum between its double wall prevents heat moving by convection. The thinness of the glass walls stops heat entering or leaving the flask by conduction. The case surrounding the flask provides additional insulation.
Explanation:
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