This produces a constant source of bubbles for combustion and causes a back-and-forth vibration of the membrane, which can be used to do work.
Interestingly, only shear stress – that caused by back and forth sliding motion – triggered an excess of quakes, not changes in compression that clamp or unclamp the fault.
Practice making the stomach ripples that cause the back and forth movements.
On Tuesday, before Mr. Bush's decision became known, the drilling issue was already causing a heated back-and-forth on the campaign trail.
Chaotic variations in the overall reaction rate during the oxidation of propylene in air are caused by a back-and-forth movement of a temperature front emanating from either one of the supports.
To date, most of the extrasolar planets have been found using the technique of the European team, by looking for wobbles in the wavelength of light from the star caused by the back-and-forth gravitational tugging of unseen planets.
Even before the disclosure of Mr. Bush's decision, the drilling issue caused a heated back-and-forth on the campaign trail on Tuesday, as Mr. McCain sought to straddle the divide between environmentalists and the energy industry, while facing accusations from his Democratic opponent, Senator Barack Obama, that he had flip-flopped and capitulated to the oil industry.
Look, for example, at how Clint Eastwood's "American Sniper" caused a spirited back-and-forth and generated no easy consensus about its patriotism quotient.
The oscillations, caused by the bobbing back-and-forth motion of the star as it is pulled around by the gravity of the planet, are similar to how the pitch of a police siren rises or falls depending on whether the patrol car is traveling toward or away from the listener.
Twelve minutes after I had placed the first leaf in my mouth, I felt the effects: I had begun to sweat, and a rhythm moved through my body, causing me to rock back-and-forth in the wooden chair.
Standing at the curb, he tried to rouse this jaded group into joining him in his cause, prowling back and forth like a rebel at the barricades in 1968.
