speed of sound in dry air at 20 C is___________

This Month around the world

18 September: Oracle, a Zionist entity, Silver Lake consortium to control 80% stake in TikTok in US, WSJ reports

18 September: Saudi Arabia signs mutual defence pact with nuclear-armed Pakistan

17 September: Mashreq launches full-service digital bank in Pakistan

17 September: Nepal's former Chief Justice Sushila Karki has been appointed as the country's new interim prime minister

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