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A hypothetical A-B alloy of composition 40 wt%B-60 wt%A at sometemperature is found to consist of mass fractions of 0.66 and 0.34for the αand β phases, respectively. If the composition of the α phase is 13 wt% B-87 wt% A, what is the composition of the β phase?
a) which measurement of the velocity of the ball do you think is the more dependable the projectile method or the pendulum method. why b) which measurement contributes to large amount of error
two links AB and DE are connected by a bell crank as shown. Determine the maximum force that can be safely exerted by link AB on the bell crank if the maximum allowable value for the reaction at C is 1600N.
A combined footing is subjected to an exterior 16 in. x 16 in. column abutting the property line carrying a total service load Pw = 300,000 lb and an interior column 20 in. x 20 in.
A commuter train has stations spaced 1 mi apart. The top speed of the train is 80 mph. The train accelerates at 5.5ft/sec2 and decelerates at 4.5 ft/sec2. It dwells at the platform for 20 sec to pick up passengers.
A 9 gram bullet is fired horizontally at a tree and is brought to a halt right before it exits the tree. the tree is 90cm thick and exerts a resistive force of 16000N on the bullet as it travels through the tree
A 13 foot long C10x25 beam is supported as a cantilever beam where x=0 on the left end. It is subject to no externally applied loads. a) What is the delfection due to self weight at the end of the beam
What is the highest downward speed (the terminal velocity), in miles per hour, ? At the terminal velocity the downward force (the weight) is equal to the upward force (the aerodynamic drag force).
The footing is supported to carry a net safe load of 400 kN/m^2 with FS = 3. Given Ysat = 20.85 KN/m^3 and phi = 35 degrees, find the required width of the footing using Terzaghi's general shear failure criterion.
Forces F and P have magnitudes of F=40 lb. and P= 60 lb., Using the paralellogram law, determine the magnitude of the resultant R and the angle theta it makes with the horizontal. The given angle is 40 degrees.
a) determine by direct integration the polar moment of inertia of the semiannular area shown with respect to point O b) Using the result of part a, determine the moments of inertia of the given area with respect to the x and y axes
A w14X74 of A992 Steel has a length of 20 feet and fixed ends. Compute the design compressive strength for LRFD and the allowable compressive strength for ASD.
A concrete building has floor area 10 m by 20 m and is 4 m high. THe building has four windows with a height 1.6 m and a width 2 m. After 10 minutes gases in the room have an average temperature of 700 degree Celcius.
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