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With what kind of constant velocity the disc rotates at a constant speed?
Wiki User
∙ 13y ago
"Some later CD drives use CLV technology in combination with constant angular velocity (CAV). With CAV, the disc rotates at a constant speed, just as is done with hard drives."
(pg 459, A+ Guide to Managing and Maintaining Your PC)
Wiki User
∙ 13y ago
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With constant velocity the disc rotates at a constant speed?
Angular
What is angular velocity and radial velocity?
Angular velocity is the rate of change of angle of a body, i.e.omega =v / r =(2*pi*r)/ r*t=(2*pi)/ Twhere T is the time period of whatever is rotating and r is the radius of the circle.So if a circular disc is spinning at 1 m/s then the angular velocity of it is 2*pi radians/ secondRadial velocity is the velocity in m/s at the radius of the circle i.e.radial velocity v =omega*r=(2*pi*r)/ T(equivalent to speed =distance/ time where in this case distance is the circumference of the circle and time is the time period of one rotation)----------------------------------------------------------------------------------------------------Angular velocity ω, is the rate of change of angular displacement dφ/dt. Itspecifies the angular speed (rotational speed) of an object and the axis about which the object is rotating.ω =2πf=2π/T [=]rad/swhere f is the rotation frequency (rev/s) and T the time it takes to make arevolution (s/rev).Tangential velocity v. When an object rotates around in a circle with radius r, itslinear velocity tangent to the circle is the tangent velocity v.v =ωr[=]m/sRadial velocity vr, is the component of the velocity of an object away ortowardthe origin or point of observation.
A disc weighing 2 kg rolls without slipping over a horizontal plane with a velocity 4 ms1 Find the kinetic energy of the disc?
A disc weighing 2 kg rolls without slipping over a horizontal plane with a velocity 4 ms1 Find the kinetic energy of the disc?
Cd Angular speed?
Audio CD players read their discs at a precise, constant rate (4.3218 Mbit/s ofraw physical data for 1.4112 Mbit/s (180.6 kB/s) of usable audio data) and thusmust vary the disc's rotational speed from 8 Hz(480 rpm) when reading at theinnermost edge, to 3.5 Hz (210 rpm) at the outer edge.480 rpm = 2,880 degrees per second210 rpm = 1,260 degrees per second
How does movement generate heat?
Through friction, mechanically by surfaces rubbing such as a brake disc and a brake pad, or by a fluid at high speed over a surface, such as reentry of a space vehicle into the atmosphere.
With constant velocity the disc rotates at a constant speed?
Angular
What kind of velocity causes a disc to rotate at a constant speed?
Uniform-Pertaining to computers-"Some later CD drives use CLV technology in combination with constant angular velocity (CAV). With CAV, the disc rotates at a constant speed, just as is done with hard drives."(pg 459, A+ Guide to Managing and Maintaining Your PC)
What is purpose of angular velocity?
In http://www.answers.com/topic/optical-storage, constant angular velocity (CAV) is a qualifier for the rated speed of an http://www.answers.com/topic/optical-disc-drive, and may also be applied to the writing speed of recordable http://www.answers.com/topic/optical-disc. A drive or disc operating in CAV mode maintains a constant http://www.answers.com/topic/angular-velocity, contrasted with a http://www.answers.com/topic/clv (CLV). When playing back music, a http://www.answers.com/topic/compact-disc (CD) employs CLV to maintain a constant data rate. The motor speed decreases from 495 to 212 rpm as the read head moves away from the center to keep the disc moving past the read head at a constant linear velocity. High speed CD and DVD drives use CAV. CAV was used in the LaserDisc format for interactive titles, as well as special editions of certain films. CAV allowed for perfect still frames, as well as random access to any given frame on a disc. Playing time, however, was cut in half from 60 minutes to 30 minutes. CAV is used with Nintendo GameCube Game Disc and Wii Optical
What is an abrasive disc?
An abrasive disc is a disc which rotates in a mechanical tool, such as a sander.
Define constant linear velocity and explain how it applies to CD standards?
Constant angular velocity of a rotating disk means that, given a stationary base reference line and a zero line on the disk, both extending from the center of rotation to the outside edge of the disk, the periodic change in angle between the two lines remains a constant. Such a disk will have constant angular velocity (CAV) if its rate of rotation or revolutions per minute (RPM) remains constant.While it would be technically possible to have the linear velocity of the disk remain constant by gradually decreasing the speed of rotation as the player head moves across the disk (because the outer paths are longer than the inner ones), this would make things more complicated both for the recording and playback machines, and therefore more expensive.The paths of information on a CD (or DVD) are analogous to the grooves on an LP recording. The recording and playback heads move across the disk (CD or LP) as it rotates. Actually, of course, there is only one spiral path or groove; on an LP, it goes from the outside edge toward the center; on a CD/DVD, it goes in the opposite direction. In deciding on the parameters for the LP and CD, engineers had to involve the amount of data to be recorded and the spacing required to record that data versus the size of the disk, the speed of rotation, the data capacity of the disk material, and the sensitivity of both the recording and playback heads. ---- The above answer defines Constant Angular Velocity (CAV), not Constant Linear Velocity. The following is the definition to Constant Linear Velocity (CLV): "Constant Linear Velocity (CLV) is a CD-ROM (Compact Disc - Read Only Memory) format in which the spacing of data is consistent on the CD, but the speed of the disc varies on whether the data being read is near the cent or the edge of the disc." During CLV, in order to create the effect of constant speed as the CD turns, the CD drive uses a mechanism that slows down the disc when the laser beam is near the center of the disc, and speeds up the disc when the laser beam is near the outer edge. Thus, the beam is over a sector for the same amount of time, no matter where the sector is.
Why disc in microwave oven rotates at slow speed?
BECAUSE IN ORDER TO HEAT UP THE FOOD IT NEEDS TO GO SLOWLY TO GET THE TRUE HEAT!
A single speed CD-ROM drive transfersdata at what rate?
150 KB/s.Reference:The first generation of "single-speed" CD-ROM drives were based on the design of audio CD drives, employing constant linear velocity (CLV) technology to spin a disc at the same speed as an audio CD which, with error correction, meant 150 KBps.Source: http://www.pctechguide.com/32CD-ROM_CLV.htm
How do you define constant angular velocity?
Assuming you mean "Constant angular velocity", let's break it down. Constant, meaning "something that does not or cannot change or vary". Velocity is distance over time, or "speed". Angular velocity is the angular distance (such as "one rotation") An example of velocity would be 60 Miles per Hour (MPH). That would be that in one hour, an object would travel 60 miles. An example of angular velocity would be 45 Degrees per Hour. For a real world example, Earth turns 1 full revolution every day. "1 revolution per day" is an angular velocity. Lets convert this to a different unit. There are 360 degrees in 1 revolution. Therefor, we can say that Earth has an angular velocity of 360 degrees per day." We can convert this unit again. There are 24 hours in one day. 360 divided by 24 = 15 degrees per hour, which is another example of angular velocity. Simply put, angular velocity is the speed at which something is rotating. In computers, angular velocity is commonly used to describe a mechanical hard disk drive. Hard drive speeds are measured in Rotations per Minute (RPM) and are commonly 4200, 5200 or 7200 RPM. The faster the speed of the hard drive, the faster it can read and write data.
What is angular velocity and radial velocity?
Angular velocity is the rate of change of angle of a body, i.e.omega =v / r =(2*pi*r)/ r*t=(2*pi)/ Twhere T is the time period of whatever is rotating and r is the radius of the circle.So if a circular disc is spinning at 1 m/s then the angular velocity of it is 2*pi radians/ secondRadial velocity is the velocity in m/s at the radius of the circle i.e.radial velocity v =omega*r=(2*pi*r)/ T(equivalent to speed =distance/ time where in this case distance is the circumference of the circle and time is the time period of one rotation)----------------------------------------------------------------------------------------------------Angular velocity ω, is the rate of change of angular displacement dφ/dt. Itspecifies the angular speed (rotational speed) of an object and the axis about which the object is rotating.ω =2πf=2π/T [=]rad/swhere f is the rotation frequency (rev/s) and T the time it takes to make arevolution (s/rev).Tangential velocity v. When an object rotates around in a circle with radius r, itslinear velocity tangent to the circle is the tangent velocity v.v =ωr[=]m/sRadial velocity vr, is the component of the velocity of an object away ortowardthe origin or point of observation.
A disc weighing 2 kg rolls without slipping over a horizontal plane with a velocity 4 ms1 Find the kinetic energy of the disc?
A disc weighing 2 kg rolls without slipping over a horizontal plane with a velocity 4 ms1 Find the kinetic energy of the disc?
What is rudimentary disc?
A rudimentary disc is an underdeveloped disc in the vertebral column. Rudimentary discs can cause constant back pain or neck pain depending on the area of the disc.
If an athlete rotates while throwing a discus and throws the discus in what direction will the discus fly and why?
The answer depends on which way the athlete rotates- if he is left handed, then the discus will spin counterclockwise. It will spin this way because the athlete must flick his wrist and spin the disc off his fingers when he releases the disc. If the athlete is right handed, then the disc will rotate clockwise for the same reason.
