A cylindrical tube of length L=0.86m has one end always closed, and the other end can be opened or closed. When the variable end is closed, the smallest frequency that can form a standing wave in the tube is 603Hz . The tube and its environment are filled with a gas in which the speed of the wave is not the speed of sound in air. (The following question(s) must be answered to within 1% of the expected value to be graded as correct.) What are the three smallest possible frequencies of standing waves when the variable end is OPEN? All three must be correct to receive credit for this question. Smallest: Hz Second smallest: Hz Third smallest: Hz