For a sound wave that has a wavelength of 1.50 m, what is the MINIMUM length of air column required for open-ended resonance? The minimum length is a.bc x 10d m. The digits together make the number, abcd, which is the answer. If a torpedo fired from a stationary U-boat hit a merchant ship at the waterline (ie. at the ocean surface), who would hear the ship explode first, the captain or the serviceman? (Assume both are the same distance from the explosion as indicated inFigure 5.) А. саptain B. serviceman C. both would hear the event at the same instant D. neither would hear the event

Fig: 1

Fig: 2

Fig: 3

Fig: 4

Fig: 5

Fig: 6

Fig: 7