How are holes made for fertilizing plants?
What will be an ideal response?
Holes for fertilizer are made using a one-inch steel stake placed in concentric circles starting about
halfway out from the trunk and the drip line.
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Foot rot is caused by a variety of bacteria, fungi, or other organisms found in the _____
a. feed c. feedlot b. water d. air
What does the acronym NFPA stand for when referring to fire safety?
What will be an ideal response?
___________________________________________ is any projection of the features of an object onto an imaginary plane called a ____________________________.
Fill in the blank(s) with the appropriate word(s).
The shunt motor in Figure P19.22 is characterized by a field coefficient k f = 0.12 V-s/A-rad, such that the back emf is given by the expression Eb = k f I f ? and the motor torque by the expression T = k f I f Ia . The motor drives an inertia/viscous friction load with parameters J = 0.8 kg-m2 and b = 0.6 N-m-s/rad. The field equation may be approximated by VS = R f I f . The armature resistance is Ra = 0.75 ?, and the field resistance is R f = 60 ?. The system is perturbed around the nominal operating point VS0 = 150 V, ?0 = 200 rad/s, and Ia0 = 186.67 A.
a. Derive the dynamic system equations in symbolic form.
b. Linearize the equations you obtained in part a.
