2014年1月3日 · 6.5 Hz - Mental mathematics. 111 Hz & 38 Hz - Release of pleasure chemicals in the human brain. (endorphins, enkephalins, dynorphins) There it is again 111 Hertz, and …

2015年10月17日 · As the article says, the standard range from this type of voice is beween E 2 and E 4 which is 82.4-329.6 Hz. For females the deep voice is contralto which is between …

2008年2月16日 · The range of human hearing extends from approximately 20 Hz to 20,000 Hz. Find the wavelengths of these extremes at a temperature of 40°C. 20 Hz = 1.07 m Your …

2010年9月17日 · If we take the frequency of middle C as 256 Hz, then the frequency of concert A (9 semitones above middle C) is 256 × (2 1/12) 9 or approximately 430.54 Hz. In some …

2009年5月30日 · It’s just that the watts-per-meter is equivalent to that of the given number of 1-Hz-photon-per-second-per-meter. An electronic signal is made of electrons, not photons. …

2015年2月8日 · Hello!I have noticed (while singing in the bathroom) that some musical tones sound louder than others. Example: (if we play a musical tone-note C (261,63 Hz) and then …

2015年4月15日 · I'm looking for an electromechanical relay capable of high switching rate (make and break) up to 100 Hz. Relay is supposed to be for 24 V DC circuit and of small curent rating …

2013年11月3日 · Yes, the US is primarily 120 powered. One difference is frequency, the US uses 60Hz; some other countries use 50Hz. Frequency affects motors primarily. Some motors will …

2013年11月24日 · A 400-turn circular coil (radius = 1.0 cm) is oriented with its plane perpendicular to a uniform magnetic field which has a magnitude that varies sinusoidally with a frequency of …

2004年9月11日 · Theta 3-8 Hz deep relaxation, meditation, increased memory, focus, creativity, lucid dreaming, hypnagogic state Alpha 8-12 Hz light relaxation, "super learning", positive …