Answer this question: what causes thunder sound?
Ans: In turn, this expansion of air creates a sonic shock wave, similar to a sonic boom , which produces the sound of thunder, often referred to as a clap, crack, or peal of thunder.

Answer this question: what is the official language of america??
Ans: The most commonly used language is English .

Answer this question: what is a discipline of study?
Ans: Disciplines are defined (in part), and recognized by the academic journals in which research is published, and the learned societies and academic departments or faculties to which their practitioners belong.

Answer this question: WHERE WAS JOHN WAYNE BORN?
Ans: Wayne was born in Winterset, Iowa but his family relocated to the greater Los Angeles area when he was four years old.