As astronomers continue mining data from the Kepler telescope, the planetary peculiarities keep on coming. We've already seen the smallest rocky world, 54 planets in a Goldilocks comfort zone around their stars, and even the possibility of planets sharing the same orbit.
Forget all the nanotechnology devoted to fighting cancer, and just consider that nanoparticles have invaded makeup, anti-odor socks, sunscreen, plastic beer bottles and home pregnancy tests. Now scientists have developed a way to assess the health and environmental impact of such nanoparticles: a tiny microresonator that can detect and measure individual particles smaller than a single virus.
Thanks to a new approach to one of microfluidics' biggest challenges -- how do you propel fluid in a number of directions at once without the clutter of myriad electromechanical valves and pumps? -- we could be closer to seeing our smartphones double as home flu kits. Credit goes to a team of chemical engineers at the University of Michigan for coming up with the innovative system, which uses music to control the fluid.
Learn how to destroy expensive glassware with the power of sound
By Adam WeinerPosted 07.08.2008 at 10:52 am 1 Comment
A few weeks back we looked at the phenomenon of resonance with oscillating metronomes. As a follow-up to that meditative and Zen-like video, we've included a crystal-clear demonstration of that favorite old opera singer's trick: shattering a wine glass with resonance.
Metronomes generally keep their own beat -- that's why we love them -- but when several get together, a compromise is hammered out
By Adam WeinerPosted 06.24.2008 at 10:50 am 1 Comment
This charming little video demonstrates the principle of resonant frequency using oscillating metronomes. The mechanical wind-up metronomes used worldwide during the dreaded Saturday piano lesson employ an inverted pendulum to keep even time intervals. The resonant frequency of the pendulum is adjusted by moving the mass up and down. Sliding the mass higher up the rod decreases the resonant frequency of the pendulum by increasing its rotational inertia.