What are three varieties each of ornamental grasses, vines, and bamboo that used
in the landscaping industry? What are some ways grasses are integrated into a
perennial garden?
What will be an ideal response?
Answers will vary as students use the figures in the text to select varieties of ornamental
grasses, vines, and bamboo that are used in the landscaping industry. Ornamental
grasses are used as accents and make attractive edging. They are also good
groundcovers and help create a sense of movement in the landscape.
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Which of the following is true of DCEP?
A. Because DCEP does not put much heat on the tip, it is relatively cool. B. With DCEP, the preferred electrode tip is pointed. C. DCEP has the highest heat concentration on the electrode tip. D. With DCEP, the point of the electrode tip is stable.
Consider an AISI 4135 steel, in which all of the alloying elements have the mean or average value of their ranges.
(a) Determine its ideal critical diameter. (b) Determine the maximum diameter of a bar of this material that can be quenched, so as to obtain a 50 percent martensite?50 percent pearlite structure at its center when given a poor oil quench. (c) Make the same computation, but now assume that the bar is given a brine quench.
A hair dryer is basically a duct in which a few layers of electric resistors are placed. A small fan pulls the air in and forces it to flow over the resistors, where it is heated. Air enters a 1200-W hair dryer at 100 kPa and 22°C and leaves at 47°C. The cross-sectional area of the hair dryer at the exit is 60 cm2. Neglecting the power consumed by the fan and the heat losses through the walls of the hair dryer, determine (a) the volume flow rate of air at the inlet and (b) the velocity of the air at the exit.
What will be an ideal response?
When gas exerts pressure on its container, the pressure is:
A) Higher on the larger surfaces. B) Higher at corners and converging surfaces. C) Higher near the middle of the container than towards the outside. D) Distributed equally on all surfaces of the container.