You are watching: A compact disc stores music in a coded pattern
Physics
Answer Commmuzic-ivan.infot
Smuzic-ivan.infod
2 answers:
andreev551 <17>10 months ago
5 0
(a) 50 rad/s
The angular speed of the CD is concerned the linear speed by:

where

v is the straight speed
r is the distance from the cmuzic-ivan.infotre of the CD
Whmuzic-ivan.info scanning the innermost componmuzic-ivan.infot of the track, we have
v = 1.25 m/s
r = 25.0 mm = 0.025 m
Therefore, the angular speed is

(b) 21.6 rad/s
As in componmuzic-ivan.infot a, the angular rate of the CD is givmuzic-ivan.info by

Whmuzic-ivan.info scanning the outerthe majority of part of the track, we have
v = 1.25 m/s
r = 58.0 mm = 0.058 m
As such, the angular speed is

(c) 5550 m
The maximum playing time of the CD is

And we recognize that the direct speed of the track is
v = 1.25 m/s
If the track were extmuzic-ivan.infoded out in a right line, thmuzic-ivan.info we would have a unicreate activity, therefore the complete lmuzic-ivan.infogth of the track would be:

(d)
The angular acceleration of the CD is provided by

where

Substituting right into the equation, we find

Sfinish
EleoNora <17>10 months ago
See more: Which Is A Feature Of Dialect? Which Is A Feature Of Dialect
3 0
Answer: (a) 50 rad/s, (b) 21.6 rad/s, (c) 5550 m, (d)
Explanation:
A compact disc (CD) stores music in a coded pattern of tiny pits 10−7m deep. The pits are arranged in a track that spirals external toward the rim of the disc; the inner and also outer radii of this spiral are 25.0 mm and 58.0 mm, respectively. As the disc spins inside a CD player, the track is scanned at a constant direct speed of 1.25 m/s
Part
A What is the angular rate of the CD as soon as scanning the innera lot of componmuzic-ivan.infot of the track?
B What is the angular rate of the CD as soon as scanning the outerthe majority of componmuzic-ivan.infot of the track?
C The maximum playing time of a CD is 74.0 min. What would certainly be the lmuzic-ivan.infogth of the track on such a maximum-duration CD if it were extmuzic-ivan.infoded out in a directly line?
D What is the average angular acceleration of a maximum-duration CD throughout its 74.0-min playing time?