A CD-ROM drive in a computer spins 12 cm diameter disks at 8000 rpm. What is the disk's period (in s)? What is the acceleration in units of g that this speck of dust experiences?
A CD-ROM drive in a computer spins the 12-cm-diameter disks at 9900 rpm. 1) What is a disk's period (in s) ? 2) What is a disk's frequency (in rev/s)? 3) What is the acceleration in units of g that this speck of dust experiences?
When a compact disk with a 12.0-cm diameter is rotating at 34.6 rad/s, what are (a) the linear speed and (b) the centripetal acceleration of a point on its outer rim? (c) Consider a point on the CD that is halfway between its center and its outer rim. Without repeating all of the calculations required for parts (a) and (b), determine the linear speed and the centripetal acceleration of this point.
Question 15 (8 points) A 15-cm diameter circular wire loop spins at 250 rpm on an axis parallel to a 750-T magnetic field. Write an expression for the emf induced in this loop as a function of time. Include numbers in your expression wherever possible, and don't worry about getting the formula formatting exactly right. (Also, you may assume the initial magnetic flux to be zero if it makes this problem easier for you.)
6. A CD player spins 8750 rpm. If it starts from rest and has an acceleration of 425r/sº, how long does it take to get to full speed?
An electrical motor spins at a constant 2695.0 rpm. If the rotor radius is 7.165 cm, what is the linear acceleration of the edge of the rotor?
4) A disk-shaped space station 175 m in diameter spins uniformly about an axis perpendicular to the plane of the disk through its center. How many rpm (rev/min) must this disk make so that the acceleration of all points on its rim is g/2?
A 5-cm-diameter shaft rotates at 4500 rpm in a 15-cm long, 8-cm-outer-diameter cast iron bearing (k =70 W/m.K) with a uniform clearance of 0.6 mm filled wwith tubricating oil (u 0.03 N.s/m2 and k 0.14 W/m.K). The bearing is cooled externally by a liquid, and its outer surface is maintained at 40°C. Disregarding heat conduction through the shaft and assuming one- dimensional heat transfer, determine (a) the rate of heat transfer to the coolant, (b) the sutacs temperature of the...
A 65-cm-diameter wheel accelerates uniformly about its center from 150 rpm to 400 rpm in 4.6 s . (please help with part b & c) a) A 65-cm-diameter wheel accelerates uniformly about its center from 150 rpm to 400 rpm in 4.6 s . (5.7 rad/s) b) Determine the radial component of the linear acceleration of a point on the edge of the wheel 1.3 s after it has started accelerating. c) Determine the tangential component of the linear acceleration...
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A 15-cm diameter circular wire loop spins at 250 rpm on an axis parallel to a 750-T magnetic field. Write an expression for the emf induced in this loop as a function of time. Include numbers in your expression wherever possible, and don't worry about getting the formula formatting exactly right. (Also, you may assume the initial magnetic flux to be zero if it makes this problem easier for you.)