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farmer is using a tandem disk harrow for primary tillage in a medium texture soil. The disk width is 6 m, the travel speed is 10 km, and the tillage depth is 20 cm. Estimate the drawbar power of a tractor required. Ignore any losses that occur during field operations
A tank initially contains 50 gal of fresh water. at t=0 brine solution containing 2 lb of salt per gallon is poured into the tank at the rate of 12 gal/minute. while the well-stirred mixtures leaves the tank at the rate of 8 gal/minutes. what is the amount of salt at the end of the 5 minutes?
A circular shaft of 12 cm dia. is subjected to combined bending and twisting moments. The bending moment being three times the twisting moment. If the direct tensile yield point of material is 350 MN/m2 and factor of safety on yield is 4, find the allowable twisting moment by
a) Maximum principal stress theory
b) Maximum shear stress theory
At a point in a strained material, the intensities of normal stresses on two planes at right angles to each other are 35 N/mm2 and 20 N/ mm2 both tensile. They are accompanied by shear stress of 15 N/ mm2. Find the principal planes and principal stresses. Find also maximum shear stress.
A rolled steel Joist of I-Section has flange length of 300 mm. wide and 20 mm thick with a web thickness of 20 mm. and overall depth of I-Section is 600 mm. If this beam carries a UDL of 40 KN/m over the simply supported beam of span 10 m, find the maximum stress produced in the beam.
A piston cylinder device containing air undergoes a series of two processes. The first process is constant volume process with the pressure decreased from 300 kPaa to 60 kPaa. The second process is compression in accordance with pV1.3 =C. Determine the work done.
perform the forward pass and backward pass calculation for the following network and determine the following information
perform the forward pass and backward pass calculation for the following network and determine the following information
𝑠=𝑢𝑡+12𝑎𝑡2 𝑒𝑞(1) The tasks are to:
a) Plot a graph of distance (s) vs time (t) for the first 10s of motion if 𝑢=10𝑚𝑠−1 and 𝑎=5𝑚𝑠−2.
b) Find the gradient of the graph at 𝑡=2𝑠 and 𝑡=6𝑠.
c) Differentiate the equation to find the functions for i) Velocity (𝑣=𝑑𝑠𝑑𝑡) ii) Acceleration (𝑎=𝑑𝑣𝑑𝑡=𝑑2𝑠𝑑𝑡2)
1- The equation for a distance, s(m), travelled in time t(s) by an object starting with an initial velocity u(ms-1) and uniform acceleration a(ms-2) is: 𝑠=𝑢𝑡+12𝑎𝑡2 𝑒𝑞(1) The tasks are to: a) Plot a graph of distance (s) vs time (t) for the first 10s of motion if 𝑢=10𝑚𝑠−1 and 𝑎=5𝑚𝑠−2. b) Find the gradient of the graph at 𝑡=2𝑠 and 𝑡=6𝑠. c) Differentiate the equation to find the functions for i) Velocity (𝑣=𝑑𝑠𝑑𝑡) ii) Acceleration (𝑎=𝑑𝑣𝑑𝑡=𝑑2𝑠𝑑𝑡2)
