Physics, 27.12.2021 17:50 danielle413
Select the correct answer
1. Instruments that produce sound are called sources of light.
2. Music has no ability to heal the mental stress.
3. A medium is necessary for sound travel.
4. We hear sounds of frequencies below 20 Hz. O First answer O Second answer O Third answer O Forth answer
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The first law of thermodynamics states that heat added to a system is neither created nor destroyed but is transformed β as it changes into other forms of energy.
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Select the correct answer
1. Instruments that produce sound are called sources of light.
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