Most 2010-era vibrators contain an electric-powered device which pulsates or throbs. In a pulsating DC or AC field, the reluctance also pulsates (see phasors). When a star pulsates, observing its pulsations gives information about its structure. A yellow supergiant, FF Aql pulsates with varying temperature, diameter, and luminosity. RS Puppis pulsates every 41.5 days, during which time its radius, temperature, and luminosity change. The supergiant pulsates, showing small variations in its brightness and spectral lines. The venturi is where the jets pulsates the dye. It is a yellow-white supergiant that pulsates between spectral types F6Ib and G2Ib. It is a yellow-white supergiant that pulsates between spectral types F6Ib and G5Ib. The air-filled crop pulsates vigorously in the hatching process, which takes about five minutes. This headache often pulsates towards the occiput (the back of the head). Tauri pulsates strongly every 470 days, being coolest and largest at minimum brightness. The radius is at maximum brightness, varying between and as the star pulsates. The white dwarf primary pulsates radially with periods of about five or six minutes. The movement pulsates with perpetual motion until the end.