A ____ clock is used in some electronic timers that must be very accurate.
a. quartz
b. neon
c. argon
d. silicon
a. quartz
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PROBLEM 2.C2 Rod AB is horizontal with both ends fixed; it consists of n elements, each of which is homogeneous and of uniform cross section, and is subjected to the loading shown. The length of element i is denoted by its cross-sectional area by its modulus of elasticity by and the load applied to its right end by the magnitude of this load being assumed to be positive if is directed to the right and negative otherwise. (Note that P1 (a) Write a computer program which can be used to determine the reactions at A and B, the average normal stress in each element, and the deformation of each element. (b) Use this program to solve Probs. 2.39.
Which of the following information is required on the label of a wire rope sling?
a. Steel alloy type
b. Rated load for at least one possible hitch and the angle on which it is based
c. Manufacturer contact information
d. Most recent periodic inspection date
Improper combustion can lead to ____.
A. excessive carbon monoxide production B. smoke condition around furnace C. wasted oil D. all of the above
?In the example at the end of the chapter comparing a geothermal heat pump installation to an air-to-water heat pump installation, which factor had the biggest influence on payback period?
A. ?COP B. ?average outside temperature in winter C. ?percent of heating load satisfied by an auxiliary heating source D. ?installation cost