A 450v , 25hp , 60Hz , four pole delta connected wound rotor induction motor has the following impedance in ohms per phase refered to the stator circuit . R1=0.641 R2=0.332 X1=1.106 X2=0.464 Xm=26.3
1: what is the maximum torque of this motor? At what speed and slip does it occur?.
2: what is the stating torque of this motor?
3: if the rotor resistance is doubled , what is the speed at which the
maximum torque now occur?

acceleration = (change in speed) / (time for the change)

change in speed = (20-120)= -100 m/s.

1.5 min = 90 sec

acceleration = -100/90 = -1.11 m/s^2.

we don't care about the 150kg or the 2,500 meters. they don't make any difference.

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option number c is the right answer.

a sonic boom is a loud boom that breaks the sound barrier

explanation:

= initial pressure

= final pressure = 2

= initial volume

= final volume = /4

= initial temperature = 20 c = 20 + 273 = 293 k

= final temperature = ?

using the equation