Mathematics, 16.10.2020 19:01, barattah
6. The drive motor of a particular CD player is controlled to rotate at a speed of 200 rpm when
reading a track 5.7 centimeters from the center of the CD. The speed of the drive motor must
vary so that the reading of data occurs at a constant rate.
a. Find the angular speed (in radians per minute) of the drive motor when it is reading a
track 5.7 centimeters from the center of the CD.
b. Find the linear speed (in cm/sec) of a point on the CD that is 5.7 centimeters from the
center of the CD.
C. Find the angular speed (in rpm) of the drive motor when it is reading a track 3
centimeters from the center of the CD. Remember the linear speed is the same for
both tracks.
Answers: 2
Mathematics, 21.06.2019 17:30, Lovergirl13
Apositive number a or the same number a increased by 50% and then decreased by 50% of the result?
Answers: 3
Mathematics, 22.06.2019 00:00, nshadow2920
Aspacecraft can attain a stable orbit 300 kilometers above earth if it reaches a velocity of 7.7 kilometers per second. the formula for a rocket's maximum velocity v in kilometers per second is vequalsminus0.0098tplusc ln upper r, where t is the firing time in seconds, c is the velocity of the exhaust in kilometers per second, and r is the ratio of the mass of the rocket filled with fuel to the mass of the rocket without fuel. find the velocity of a spacecraft whose booster rocket has a mass ratio of 20, an exhaust velocity of 2.1 km/s, and a firing time of 15 s. can the spacecraft achieve a stable orbit 300 km above earth?
Answers: 3
6. The drive motor of a particular CD player is controlled to rotate at a speed of 200 rpm when
rea...
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