The word sound refers to wavelengths of sounds humans can hear. true or false?

How were returning african-american soldiers treated in american cities in 1919–1920?

What ideas, institution, and causes became the focal points of chinese and islamic resistance respectively to the west in the latter half of 19th century and the first decades of the 20th

Which of these terms describes the agreement between abraham and god that forms the found ation of the jewish religion