Beets need a soil pH above 6.5
Indicate whether the statement is true or false
True
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Steel reinforcing bars, generally used in concrete, have a yield strength of
A) 120 ksi. B) 80 ksi. C) 100 ksi. D) 60 ksi.
Natural resources that human efforts can replace are ____
A) nonrenewable B) renewable C) ?exhaustible D) depletable
In the article “Influence of Crack Width on Shear Behaviour of SIFCON, the maximum shear stress ? of a cracked concrete member is given to be 
, where 
is the maximum shear stress for a crack width of zero, w is the crack width in mm, and k is a constant estimated from experimental data. Assume 
. Given that =50 MPa and w=1.0 mm, both with negligible uncertainty, estimate ? and find the uncertainty in the estimate.
What will be an ideal response?
Give the most important pigment in photosynthesis
What will be an ideal response?