Teaching SUPER TET - UP Assistant Teacher Mock Test Series General Science Physics Wave

एका विशिष्ट तापमानाला, ध्वनी ______ मध्ये सर्वाधिक वेगाने प्रसारित होतो.

1
पाणी
2
निर्वात पोकळी
3
लोह
4
हवा
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