The total lime requirement of an acid soil can be measured by a(n) ____________________ test
Fill in the blank(s) with the appropriate word(s).
ANS: buffer
You might also like to view...
Generating sinusoidal signal in noise and computing SNR. The following worksheet specifies a 15-sample sinusoidal signal s sub “1” having one period with amplitude specified in A2. The noise Ni variance ? sub “N”¬¬¬¬ with exponent of “2” is specified in B2.
a. What is the formula that computes the signal s1 in B6?
b. What is the formula that computes the noise N1 in C6?
c. What is the formula that computes the observed signal X1 in D6?
d. What is the formula that computes the signal energy Es in G5?
e. What is the formula that computes the SNR in G7?
f. What is the formula that computes the SNR in dB in G9?
Today's plants are _____
A) produce less offspring B) are more likely to become diseased C) ?more resistent to diseases D) ?produce low quality flower color
Computer study—Influence of supports on frame behavior.
(a) Using the RISA-2D computer program, compute the initial elastic deflection at midspan of
the girder in Figure P8.44, given that the support at D is a roller. For the computer analysis,
replace the tapered members by 3-ft-long segments of constant depth whose properties are
based on each segment’s midspan dimensions; that is, there will be 9 members and 10 joints.
When you set up the problem, specify in GLOBAL that forces are to be computed at three
sections. This will produce values of forces at both ends and at the center of each segment.
To account for cracking of the reinforced concrete, assume for girder BCD that I e = 0.35I G ; for
column AB assume I e = 0.7I G (compression forces in columns reduce cracking). Since
deflections of beams and one-story rigid frames are due almost entirely to moment and not
significantly affected by the area of the member’s cross-section, substitute the gross area in
the Member Properties Table.
(b) Replace the roller at support D in Figure P8.44 by a pin to prevent horizontal displacement
of joint D, and repeat the analysis of the frame. The frame is now an indeterminate structure.
Compare your results with those in part (a), and briefly discuss differences in behavior with
respect to the magnitude of deflections and moments.
NOTE: Because reinforced concrete beams crack due to tensile stresses created by moment
and shear, initial elastic deflections are based on an empirical equation for moment of inertia
established from experimental studies of full-size beams (provided in the ACI Code). This
equation produces an effective moment of inertia I e that varies from about 0.35 to 0.5 of the
moment of inertia I G based on the gross area of the cross section. The additional deflection
due to creep and shrinkage that occurs over time, which can exceed the initial deflection, is
not considered.
The time period used to measure the frequency of sound waves is:
A) 1.0 minute B) 1.0 second C) 0.1 second D) 0.5 second