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(a) Define the hardenability of a steel.
(b) Define the hardness of a steel.
(c) Describe the Jominy hardenability test.
(d) Explain how the data for the plotting of the Jominy curve are obtained and how the curve is constructed.
(e) Of what industrial use are Jominy hardenability curves?
Determine the drag force FD on a golf ball assuming it is a smooth sphere. (Assume the air is at 60 F and standard pressure.) Now determine the drag force on an actual golf ball assuming CD = 0.25. How do the two forces compare
For unidirectional carbon/epoxy tape at a 60% fiber volume fraction, calculate E11 and E22. Given Ef= 211 GPa and Em =10 GPa. Calculate the fiber weight fraction. Given pf=1.95 g/cm3 and pm =1.3 g/cm3.
An airplane is flying at 10.6 km altitude. in its nonpressured cargo bay is a container of mercury 325 mm deep. The container is vented to the local atmosphere.
Should the laboratory test programme focus on producing values of c' and Ø', or Su (undrained shear strength)? Explain - Discuss the soil mechanics aspects of situation and determine whether the risk of failure in the soil is increasing, decreas..
In a random pattern of eight bits used to test a micro-circuit, each bit is equally likely to be 0 or 1. Assume the values of the bits are independent. a. What is the probability that all eight bits are 1
Assume that 200 g is the equivalent mass of the stick concentrated in the blade which contacts the puck. The coefficient of restitution of between puck and blade is 0.6. Find the velocity of the blade of the stick
A stream with a flow of 22 mgd contains 180 mg/L of sodium cyanide in the form of NaCN. Chlorine can be added to destroy the NaCN waste according to the reaction shown below. Find the theoretical minimum amount of chlorine required (in lb/day).
compute the critical buckling load for a 2.5m timber column of full size square section 0.10m x 0.10m. The column has pinned ends(k=1). Assume the modulus of elasticity is 12Gpa and that the Euler formula applies
The PVC pipe weighs 36.1 pounds per foot of length. Determine the minimum uniform thickness (in) of concrete (150 lbs/ft^3) required around the exterior of the PVC pipe to prevent the empty pipe from floating.
The river flow at an upstream gauging station is measured to be 1500 m3/s, and at another gauging station 3 km downstream, the discharge is measured to be 750 m3/s at the same instant of time.
Two aluminium bars (E = 70 GPa) are attached to regid support at the left and a cross-bar at the end. An iron bar (E = 200 GPa) is at attached to the rigid support at the left and there is a gap b = 0.6 mm between the right end of the iron bar and cr..
A field sample of medium sand with median grain size of 0.84 mm will be tested to determine the hydraulic conductivity using a constant-head permeameter. The sample has the length of 30 cm and a diameter of 5 cm.
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