Math
posted by sadf .
If a CD spins at 75 revolutions per minute, hoe long, in seconds, does it take for the CD to rotate through an angle of 1125 ?

Math 
Henry
75 rev/min.
V = (75 / 60) rev/s * 360 deg/rev = 450
deg/s.
t = 1125 deg / 450 deg/s = 2.5 Seconds.
Respond to this Question
Similar Questions

Physics
A CD rotates at 500 (revolutions per minute) while the last song is playing, and then spins down to zero angular speed in 2.60 seconds with constant angular acceleration. The magnitude of the angular acceleration of the CD, as it spins … 
Mec 123
A flywheel rotating at 5.3 revolutions per second has an angular retardation of 4/5 radian per second per minute.calculate:(i)its angular velocity after 45 seconds(ii),the number of revolutions it makes in 1 minute, and in coming to … 
physical
Awheel increases its speed from 45 revolutions per minute to 90 revolutione per minute in 30 seconds.find angular acceralation of the wheel and number of revolution made by this wheel in this 30 seconds. 
Trigonometry
The Earth rotates on it's axis once every 24 hours. a)How long does it take Earth to rotate through an angle of 4pi/3? 
math
(2 revolutions/second)(60 seconds/minute) would this just be: 2 rev. per second • 60 seconds= x rev. per minute 120 revolutions per 60 seconds 120 revolutions per minute answer= 120 revolutions per minute 
physics
If the CD rotates clockwise (let's take clockwise rotation as positive) at 500 (revolutions per minute) while the last song is playing, and then spins down to zero angular speed in 2.60 with constant angular acceleration, what is , … 
physics
A helicopter blade spins at 110 revolutions per minute. Its tip is 5.50 m from the center of rotation. 
Math
A wheel made 123 revolutions per minute. How many minuted did it rotate? 
Math 142 (PreCal) (Circles)
A wheel spins through 29 revolutions per minute. Find the angular velocity and the linear velocity if the radius of the wheel is 1.8 feet. w=? 
Math
A wheel made 300 revolutions at 31 2/7 revolutions per minute. How many minutes did it rotate?