Current experiments in atomic trapping and cooling can createlow-density gases of rubidium and other atoms with temperatures inthe nanokelvin (1.00 10-9 K) range. These atoms are trapped andcooled using magnetic fields and lasers in ultrahigh vacuumchambers. One method that is used to measure the temperature of atrapped gas is to turn the trap off and measure the time it takesfor molecules of the gas to fall a given distance. Consider a gasof rubidium atoms at a temperature of 97 nK. Calculate how long itwould take an atom traveling at the rms speed of the gas to fall adistance of 11.0 cm if it were initially moving directly downwardand if it were initially moving directly upward. Assume that theatom doesn't collide with any others along its trajectory.
moving directly downward ms
moving directly upward ms
Current experiments in atomic trapping and cooling can createlow-density gases of rubidium and other atoms with temperatures inthe nanokelvin (1.00 10-9 K) range. These atoms are trapped andcooled using magnetic fields and lasers in ultrahigh vacuumchambers. One method that is used to measure the temperature of atrapped gas is to turn the trap off and measure the time it takesfor molecules of the gas to fall a given distance. Consider a gasof rubidium atoms at a temperature of 97 nK. Calculate how long itwould take an atom traveling at the rms speed of the gas to fall adistance of 11.0 cm if it were initially moving directly downwardand if it were initially moving directly upward. Assume that theatom doesn't collide with any others along its trajectory.
moving directly downward ms
moving directly upward ms
