Vote
Posted 10 years ago by boyt in category: science   Comments (0)


Vote
A tennis ball is placed in a tube with vacuum. When exposed to air, the ball is accelerated by the atmospheric pressure.
Posted 9 years ago by pancho in category: science   Comments (0)


Vote
Listen to this video until the end, and when it stops, play it again to hear the difference. A Shepard tone, named after Roger Shepard, is a sound consisting of a superposition of sine waves separated by octaves. When played with the base pitch of the tone moving upward or downward, it is referred to as the Shepard scale. This creates the auditory illusion of a tone that continually ascends or descends in pitch, yet which ultimately seems to get no higher or lower.[1] It has been described as a "sonic barber's pole".
Posted 9 years ago by anri1 in category: science   Comments (4)



Vote
Posted 11 years ago by boyt in category: science   Comments (0)


Vote
Posted 10 years ago by sp in category: science   Comments (0)