how a gyroscope work?
466855
usually a wheel, mounted so that it can spin about an axis in any direction. When spinning, the gyroscope has special properties. Many spinning objects exhibit some of these properties; the rotation of the earth about its axis gives it the properties of a huge gyroscope. Once a gyroscope starts to spin, it will resist changes in the orientation of its spin axis. For example, a spinning top resists toppling over, thus keeping its spin axis vertical. If a torque, or twisting force, is applied to the spin axis, the axis will not turn in the direction of the torque, but will instead move in a direction perpendicular to it. This motion is called precession. The wobbling motion of a spinning top is a simple example of precession. The torque that causes the wobbling is the weight of the top acting about its tapering point. The modern gyroscope was developed in the first half of the 19th cent. by the French physicist Jean B. L. Foucault, and its first notable use was in a visual demonstration of the earth's rotation. In the second half of the 19th cent., with the invention of the electrically driven rotor, its uses multiplied. It became possible to rotate the gyroscope's wheel at desired speeds without interfering with the precession. Large gyroscopes are used in ship stabilizers to counteract rolling. The gyroscope is the nucleus of most automatic steering systems, such as those used in airplanes, missiles, and torpedoes. It is also used in the gyrocompass, a directional instrument used on ships. Unaffected by magnetic variations, its spinning axis, when brought in line with the north-south axis of the earth, provides an accurate line of reference for navigation.\n\nAlso look at...\n\nhttp://en.wikipedia.org/wiki/Gyroscope
1130182
Um... I think maybe pull... if something is rotating/turning it is creating it's own little gravity field (I think!) therefore making it easier to pull.  I'm no scientist but this is an educated guess.
840206
It points straight down (if it is mounted so that it can do this) at the magnetic pole. The magnetic and geogrpahical poles do not coincide.
739296
Transfer function implies having  a mathematical formula. A gyroscope is a physical thing. What is your question ??? It's like asking for the equation of an apple.
870916
There is a weight mounted off-balance on a shaft so that it hangs down. It has a one-way ratchet connected to a reduction gear so that motion in one direction winds the spring. In the other direction the shaft just turns freely.\n\nAs you move about, walking, running, gesturing, whatever, your wrist moves back and forth. As your wrist changes position the weight causes the shaft to turn and the ratchet captures the motion to wind the main spring.
418412
cy·clom·e·ter (sī-klŏm'ĭ-tər) \nn.\nAn instrument that records the revolutions of a wheel to indicate distance traveled.\nAn instrument that measures circular arcs.\n\nGoniometer \nAn instrument used for measuring geometric angles. See radio direction-finder. \n\n**please check the internet for more information** :)
391356
Same as a GPS. It triangulates the exact position
831067
Any kind of spinning top is a gyroscope.  So building one is straight forward.  Not really sure what you mean about "displacement"?  Gyroscopes are to stop displacement but their size depends are what you can steady with the rotation of the gyroscope.
73924
A mercury barometer works by the atmospheric pressure pushing down on a mercury reservoir, forcing the mercury up a tube against a scale.  The mercury is separated from the atmosphere by a flexible diaphram.\n\nAdjustment is usually made by adjusting a screw which moves the diaphram up or down so adjusting the height of the mercury column against the scale for a given atmospheric pressure.  Occassionaly the scale can be moved up and down to adjust.
1185030
For most operations, the telescope uses reaction wheels.  These are gyroscopes on motors.  If the telescope wants to pan in one direction, it speeds up a reaction wheel in the opposite direction, and conservation of angular momentum ensures that if the wheel spins faster counter-clockwise, the telescope spins faster clockwise to compensate.  Once the correct angle has been achieved, the reaction wheel is spun back to its normal speed, and the telescope stops panning.  This method is much more precise than rockets which would usually have to burn continuously to hold a stable attitude, polluting the vicinity with burned materials which can interfere with imaging or degrade the mirror by accumulating on it.\n\nOver time, external torques can pull the telescope out of alignment, requiring the reaction wheels to spin faster and faster to keep it steady.  Eventually they reach their maximum rotation rate, and something has to be done.  This is done by "reaction wheel desaturation".  Only at this point do the rockets on the telescope fire up and apply a torque which lets the reaction wheels be spun back down to their normal operating range.  The telescope can't do any science while the rockets are firing.\n\nThe pointing accuracy and stability of the telescope are controlled by locking onto guide stars.  It has specialized instruments that let it control its orientation by measuring the location of known bright stars.
151138
There are two versions of the mouse:\n\n* The tracking ball based - This consists of a ball enclosed in a housing, the walls of which have wheels that rotote in accordance to the wheel brushing against it (much like gears in motion). The wheel is in contact with the surface of motion, and rotates according to the way we move the mouse. The motion of the wheels is encoded digitally and sent to the CPU.\n\n* The optical mouse - this consists something like a camera on the bottom side, which is illumiated. The camera takes quick snapshots of the surface on which it is placed, and processes the information from consecutive such frames to determine motion, if any, and how much.
210959
Maybe the following picture will give you an idea:\nhttp://pg.photos.yahoo.com/ph/dpeter508/detail?.dir=/c51a&.dnm=b97fre2.jpg&.src=ph\n\nThis is a binary pattern painted on the shaft, with three sensors (red dots in the pic).  The outermost sensor will detect black and white squares, and can determine rotational speed based on the rate that the black and white squares go by.  As the shaft rotates, the sensors will detect the 3-bit pattern painted on the shaft at any point.  If the shaft is turning in one direction, the pattern will appear to "count up" or down depending on direction.
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A tuning Fork...Is something that vibrates when you hit it.It's used to analyze sound frequencies and variations.\nA Spectrometer...Is used to analyze light under different angles\nA Potentiometer...Is a piece of equipment that would allow you to calculate the potential of a battery connected to it...\nA magnetometer....Is an instrument used to measure the strength and/or direction of the magnetic field in the vicinity of the instrument....\nA lens...is a device that causes light to either converge and concentrate or to diverge...\nA thermometer is an instrument used to measure temperature or temperature gradient...
195389
Rotational speed sensors have different types according to the operating prenciples of the design such as hall effect sensors, inductive sensors and magnetoresistive. The following link is about the hall-effect theory...\n\nhttp://w5ac.tamu.edu/~kc5nnw/359/wheelspeed/sensors.html\n\nThis is about a magnetoresistive type manufactured by philips:\nhttp://www.semiconductors.philips.com/acrobat_download/applicationnotes/KMI16-15.pdf#search='rotational%20speed%20sensors'\n\nhope I helped...
1021379
Not real sure of the concept behind this as I have never worked on one. I assume it use a Wheel of some sort that spin with the amount of Volume. Electronic Meters could use a type of sensor that can meter the Volume by different electronic methods such as Ultraviolet light. I will look around and see what Info I can find. This is a good question you ask, that I have never really had a need to ask, now I am curious.\nYea, it depend on the type of application as to the type and function of the meter. Very much to learn here. There are Ultrasonic Meter, Venturi, Magnetic etc. it Awesome. But, the Basic function is to control/meter the amount of whatever you transferring for different reasons.
12014
Though I like most answers to this question, posted here, and also enjoy this source http://howthingswork.virginia.edu/print.php?title=Bicycles&startdate=0&enddate=99999999&topic=bicycles, I would actually answer this question with Newton's Three Laws of Motion (http://csep10.phys.utk.edu/astr161/lect/history/newton3laws.html), especially the Second Law of Motion: F = ma.\n\nIn this case, a few forces come into play: gravitational force, gyroscopic precessional force, as well as the force applied by the rider of the bike, to name a few.  If the net force (F) is non-zero, the bike's center of gravity would move with an acceleration (a.)\n\nWhen a bike is stationary, there is only gravitational force.  If the bike's center of gravity goes off its base of support, the bike would move toward the ground in that off direction.  Now if someone would apply a force whose vertical component cancels or is greater than the gravitational force, then the bike would not drop to the ground, for the same reason: no F, no a.\n\nWhen a bike is moving, the forces generated by the gyroscopic precession and the steering of the rider would cancel out the gravitational force, keeping the bike moving and not falling to the ground.  At a slower speed (hence a smaller gyroscopic precession force) or with a novice rider (not knowing how to steer the wheel) or a combination of both, these forces would be less than the gravitational force, and the bike would still fall.  Any kid learning how to ride a bike would tell you that :-).  Similarly if we push a bike forward, it would eventually fall, once the gravitational force would dominate and a (acceleration to the ground) would be greater than 0.
229380
It will weigh things that are suspended in air or water. It was invented by Newton.