Answer:
The answer is below
Explanation:
1) The synchronous speed of an induction motor is the speed of the magnetic field of the stator. It is given by:
2) The speed of the rotor is the motor speed. The slip is given by:
3) The frequency of the rotor is given as:
4) At standstill, the speed of the motor is 0, therefore the slip is 1.
The frequency of the rotor is given as:
To solve this problem we will apply the concepts related to translational torque, angular torque and the kinematic equations of angular movement with which we will find the angular displacement of the system.
Translational torque can be defined as,
Here,
F = Force
d = Distance which the force is applied
At the same time the angular torque is defined as the product between the moment of inertia and the angular acceleration, so using the previous value of the found torque, and with the moment of inertia given by the statement, we would have that the angular acceleration is
Now the angular displacement is
Here
= Initial angular velocity
t = time
Angular acceleration
= Angular displacement
Time is given as 1 minute, in seconds will be
There is not initial angular velocity, then
Replacing,
The question neglects the effect of gravitational force.
Answer:
P = 24.38 hp
Explanation:
Given data:
diameter of steel pipe = 3 inc
length of pipe = 2001 ft
elevation of pond = 4286 ft
elevation of snow making machine = 4620 ft
Rate of water = 0.26 ft^3/s
Applying bernouli equation on bioth side
.....1
where P_2 = 182 psi
P_1 = 0, v_1 = 0
calculation fro friction factor
from standard table we have
so for calculated R and, F value = 0.0212
from equation 1
h_p = 826.76ft so that