PWM stands for Pulse Width Modulation. The speed controller uses PWM to control the power going to the motor. The controller breaks the current going to the motor into separate pulses that occur about 13,000 times per second. The percentage of the pulse that is on power compared to the part of the pulse that is off power determines how much power the motor sees. An oversimplified example is that if 50% of the pulse is on and 50% is off, the motor sees 50% power.

PWM stands for Pulse Width Modulation. It is a method for applying a variable amount of power by changing the on and off time of a periodic signal. For example, an output that is fully on 50% of the time, and fully off the other 50% this will average in an actual average power to the motor of 50%. For PWM to work well, however, the on-off cycle must repeat at a relatively high frequency.

PWM stands for Pulse Width Modulation. Most modern power control is done using mosfets, which are high speed switches. PWM is a method for varying the output power by switching the output to full power for a very short period and then off. This is performed over and over at high frequency, usually from about 1 kHz (1000 times per second) up to around 100 kHz (100,000 time per second). The power is varied by changing the ratio of on time to off time.

Well apparently it has to do with something called gene expression, which refers to the pattern in which genes are switched on and off. And gene expression has a major effect on your body's biological processes. Each cell in your body contains a 'power-factory' that produces energy, called the mitochondria.

Isotonic solutions cause no swelling or contraction of the tissues with which they come in contact, and produce no discomfort when instilled in the eye, nasal tract, or other body tissues.

The tonicity of the solution is less than that of the cells. When this occurs, water enters into the blood cells causing them to swell and finally burst, with the liberation of hemoglobin, or water invasion of the body’s cells. If this invasion is beyond the body’s cells, then water intoxication results, with convulsions and edema.

The tonicity of the solution is greater than that of the cells, which can cause a variety of complications, such as, hyperglycemia, intracellular dehydration, loss of water and electrolytes, dehydration and coma.

Here a "hack" is a clever shortcut or a lesser-known, faster way to get something done. A hacker believes that information-sharing is a powerful positive good, and that it is a hacker's duty to share her expertise—so we will.

Please see RTFM in the Jargon File. Posters please note: Moderators are unlikely to approve follow-ups that consist solely of "RTFM".

Read The Fine FAQ, a variant of RTFM. Also RTFAQ Posters please note: Moderators are unlikely to approve follow-ups that consist solely of "RTFF".

If air at the brochure rate is unavailable, we will offer the next best alternate to you. You always have the option to revise your departure city or make the booking land-only, prior to ticketing, if the up-sell charge is unacceptable. Back to top

STD is short for "sexually transmitted disease." Another term you may have heard is "venereal disease," or VD.

The word hatha means willful or forceful. Hatha yoga refers to a set of physical exercises (known as asanas or postures), and sequences of asanas, designed to align your skin, muscles, and bones. The postures are also designed to open the many channels of the body?especially the main channel, the spine?so that energy can flow freely. Hatha is also translated as ha meaning "sun" and tha meaning "moon.

John Lennon and his friend Stuart Sutcliffe came up with the name "Beatles", a pun on Buddy Holly's "Crickets", in 1960.