A chemical process initiated by the absorption of light is known as what type of reaction?
A. photoelectric
B. photochemical
C. galvanic
D. oxidation
Answer: B
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The symmetry geometric characteristic symbol is a part of the ____________________ category.
Fill in the blank(s) with the appropriate word(s).
Figure 13.13 represents a tower crane used by Tomas J. Contracting to handle materials at construction sites. The weight, W, is hoisted to the desired height and then moved along the boom AE from 6 ? x ? 86. The counterweight, CW, weighs 8 500 lbm, and the crane motor and cab weigh 2 400 lbm acting at B. The crane structure weighs 5 500 lbm and can be considered to be acting at G.
Pins at C and D secure the crane base. gL = 32.174 0 ft/s².
(a) If the weight to be lifted, W, is
3 200 lbm, plot the reactions at C and D versus the distance x.
(b) Find the points where the loads at C and D are maximum and size the pins required. Each pin is in double shear and is made from stainless steel with a factor of safety of 5.0 based on ultimate strength.
(c) If the load, W, is increased to 4 200 lbm, determine if this load can be lifted safely with the pin sizes calculated and, if so, the range of x for which it is possible.
 FIGURE 1.png)
Today's domesticated animals have been selectively bred to live in confinement
Indicate whether the statement is true or false
Corresponding parts of congruent triangles are equal.
Answer the following statement true (T) or false (F)