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The range of economical spacing of trusses varies from

The range of economical spacing of trusses varies from Correct Answer $$\frac{{\text{L}}}{3}$$ to $$\frac{{\text{L}}}{5}$$

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If the cost of purlins/unit area is p and the cost of roof covering/unit area is r, then cost of trusses/unit area for an economical spacing of the roof trusses will be
All the forms of matter except gases emit electromagnetic radiation continuously. The gases which electrically or thermally excited emit a certain wavelength only, then which of the following is/are true about the process (i) The spacing between the atoms in the other forms of matter is high than in gas (ii) The spacing between the atoms in gases is high than the other forms of matter (iii) The energy of the emitted radiation depends on the spacing between the atoms (iv) The wavelength of the emitted radiation depends on the spacing between the atoms 
The economical spacing of roof trusses works out to be _________ span.
The growth rate of pearlite, v, and the interlamellar spacing S are given by the following relation, $$v = k.\frac{1}{S}\left( {\frac{{1 - {S_c}}}{S}} \right)$$    where Sc is the critical spacing at which the growth rate is zero and k is a materials constant. The actual interlamellar spacing observed will correspond to
The joint in the trusses are generally formed by welding the materials at the ends of the trusses on a common plate. Which gives strength to the design. What is that plate called?
A spacing ‘’D’’ can be used to completely accommodate the lattice misfit in the one direction without any long-range strain field by a set of edge location. Calculate the value of D if the interplanar spacing’s of matching planes are given as 20mm, 19mm respectively? (Assume the misfit to be very small)
A varies directly with difference of B and C. B varies directly with M and C varies directly with √M. If M = 4 then A = 18 and when M = 9 then A = 42. Find the value of M when A = 4.
A varies directly with the sum of B and C. B varies directly with D and C varies directly with D2. If D = 2 then A = 16 and if D = 4 then A = 56. What is the value of A when D = 3?
Which among the following statements about Satpura Range is/are correct? 1. Mountain Range Satpura and Vindhya Found in the Eastern part of India. 2. The range, the name of which means “Seven Folds,” forms the watershed between the Narmada (north) and Tapti (south) rivers. 3. If peaks more than 4,000 feet (1,200 meters) high, the Satpura Range includes the Mahadeo Hills to the north, the Maikala Range to the east, and the Rajpipla Hills to the west.
The digitization process i.e. the digital image has M rows and N columns, requires decisions about values for M, N, and for the number, L, of max gray levels is an integer power of 2 i.e. L = 2k, allowed for each pixel. If we assume that the discrete levels are equally spaced and that they are integers then they are in the interval __________ and Sometimes the range of values spanned by the gray scale is called the ________ of an image. and static range respectively b) and dynamic range respectively c) and static range respectively d) and dynamic range respectively