Acentrifuge is a common laboratory instrument that separates components of differing densities in solution. this is accomplished by spinning a sample around in a circle with a large angular speed. suppose that after a centrifuge in a medical laboratory is turned off, it continues to rotate with a constant angular deceleration for 10.0s before coming to rest.

a. if its initial angular speed was 3890rpm , what is the magnitude of its angular deceleration?

b. how many revolutions did the centrifuge complete after being turned off?

To solve this problem we turn to the kinematic equations of angular motion.

Through them we know that the change in angular acceleration is equal to the change in velocity over a certain time, that is,

The information provided says that the initial angular velocity is 3890, and the final is 0 (idle)

In this way,

It is divided by 10 because the revolutions are in minutes and the time is given in seconds.

B) To find the number of revolutions, we know that the angular velocity is equal to the displacement in a given time, that is,

chemical properties of thing

a solenoid is created by wrapping a l = 90 m long wire around a hollow tube of diameter d = 4.5 cm.   the wire diameter is d = 0.9 mm.   the solenoid wire is then connected to a power supply so that a current of i = 9 a flows through the wire.

randomized variablesl = 90 m

d = 4.5 cm

d = 0.9 mm

i = 9 a                                          

write an expression for the number of turns, n, in the solenoid. you do not need to take into account the diameter of the wire in this calculation.

calculate the number of turns, n, in the solenoid.

write an expression for the length of the solenoid (l2) in terms of the diameter of the hollow tube d.

calculate the length of the solenoid (l2)   in meters.

calculate the magnitude of the magnetic field at the center of the solenoid in teslas.

explanation: