How do turfgrasses differ from other grass plants?
What will be an ideal response?
Turfgrasses are plants grouped into the Poaceae family. These grasses differ from other grass plants
because they can withstand mowing at low heights. They can also tolerate vehicle and foot traffic.
Turfgrasses are frequently used to hold the soil and as ornamental plants.
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Explain the complex social structure that developed in the South during the 17th and 18th centuries and its implications for the evolution of indentured servitude and slavery in the South.
What will be an ideal response?
In which component is heat added to the refrigerant?
A) Thermostatic expansion valve B) Condenser C) Evaporator D) None of these is correct
Assume that the coupling between the motor and the inertial load of Problem 19.25 is flexible (e.g., a long shaft). This can be modeled by adding a torsional spring between the motor inertia and the load inertia. Now we can no longer lump together the two inertias and damping coefficients as if they were one; we need to write separate equations for the two inertias. In total, there will be three equations in this system: the motor electrical equation, the motor mechanical equation (Jm and Bm), and the load mechanical equation (J and B)
a. Sketch a diagram of the system. b. Use free-body diagrams to write each of the two mechanical equations. Set up the equations in matrix form. c. Compute the transfer function from input voltage to load speed, using the method of determinants.
Which type of tap should be used to cut new threads to a bore?
A. taper B. plug C. bottom D. chaser