The Cassini spacecraft that visited Saturn and its moons did more than take pretty pictures; it also returned physical data. Saturn’s moon Titan has a substantial atmosphere, and Cassini went close enough to detect atoms and molecules from Titan’s atmosphere. It measured the atmospheric composition with a time-of-flight mass spectrometer. Ionized atoms and molecules were accelerated through a 30 kV potential difference and then sent through a chamber of length 18.8 cm. The time to travel the length of the chamber was measured, with heavier particles taking longer times. What is the travel time for a singly ionized molecule of water?