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Crates A and B weigh 240lb and 250lb , respectively. They are connected together with a cable and placed on the inclined plane If the angle theta is gradually increased, determine theta when the crates begin to slide. The coefficients of static friction between the crates and the plane are mu_A = 0.35 and mu_B = 0.50.
fy=50000psi, f'c=3000 span of l=28 ft, dead load not including beam weight = 3 k/ft, live load=3 k/ft, p*=0.5pb, concrete weights=150 lb/ft cubed, use h=d+2.5 inch, assume beam weight =10kN/m and phi=0.90
For some minerals color is a diagnostic property making identification rather easy. However, certain minerals can also occur in a wide variety of colors making color a poor tool for identification. List different colors for the mineral quartz lo..
At a point in a material, a resultant stress of 151 MN/m^2 acts in a direction making angles of 52 deg, 79 deg, and 40.13 deg with the coordinate axes, x,y and z respectively.
water flows at a velocity of 25 ft/s at a depth in a rectangular channel 16 feet wide. Determine the downstream depth necessary to form a hydraulic jump, the head loss through the jump and the horsepower dissipated in the jump.
The current removal efficiency is 96% for an air flow rate through the separator equal to 18 m3/s. Due to a process change, the air flow rate is expected to increase to 22 m3/s.
Consider two beams, which are loaded the same but have different support conditions. Which beam has the largest maximum moment? First, find support reactions, and then plot axial force (N), shear (V)
a hawk flying at 2 ms at an altitude of 45 m accidentally drops its prey. the parabolic trajectory of the falling prey
Find the velocity of the air downstream of the restriction, and show that the enthalpy is essentially the same before and after the throttling process. Also find the change of entropy.
Determine the normal and critical depth for a 4-m-wide rectangular channel with a discharge of 100 m3/sec. The cannel is made of concrete and the slope is 1.0 percent. Also determine the flow classification (critical, subcritical or supercritical)
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 waste heat source is available at 400°C. A heat engine operates using heat from this source. It rejects heat to the surroundings at 38°C. The power from the engine runs an air conditioner to keep the air inside a building at 25°C
You are asked to design a winch system for Santa's sleigh. Assume that Santa weighs 300 lbs, visits 10 houses an hour and requires a 20 foot lift at each house, what is the average power that the system will use if it is perfectly efficient? Express ..
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