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As shown, a submarine hatch door is to be opened by applying two oppositely oriented forces of equal magnitudeF=50.0lb at points A and B on the hatch door wheel. The radii of the wheel's inner and outer rings are r1 = 1.90ft andr2 = 0.500ft , respectively. (Figure 1) Calculate the moments MA and MB about point D for the forces applied at pointsA and B. Then, determine the resulting couple moment MR. Assume that a positive moment produces a counterclockwise rotation whereas a negative moment produces a clockwise rotation.
Express your answers numerically in pound-feet to three significant figures separated by commas.
Secant pile Design - Introduction, Soil condition and Test require - You need to prepare a project on secant pile
In an undisturbed soil formation, it is known that the dry soil weight is 115pcf. The specific gravity of the soil particle is 2.75.a) What is the saturation wet unit weight of the soil b) What is the submerged weight of the soil
What is the modulus of elasticity of this composite in the longitudinal direction?
The refrigerator resembles a small ice chest and is claimed to cool nine canned drinks, 0.350-L each, from 25 to 3°C in 12 h
One kilogram of air, initially at 5 bar, 350 K, and 3kg of carbon dioxide (CO2), initially at 2 bar, 450 K,are confined to opposite sides of a rigid, well-insulated contained, as illustrated in the figure below.
A pump of 80% efficiency lifts water from one large open tank to another; the difference in water surface elevations is 20 feet. The pipe is relatively smooth (f = 0.0122), and has 3 elbows, each with a loss coefficient of 2/3.
the relative humidity of the air contained in a well-sealed room change as it is heated?
An equal-tangent crest vertical curve connects a +3.2% and -1.1% grade. The PVI is at station 98+20. Due to drainage considerations, the highest point of the curve is at station 100+79.35.
A 10-year, 12%, $1,000 bond that pays dividends quarterly can be purchased for $900. If the bond is purchased and pays as scheduled, calculate the nominal and the effective rate of return that the purchaser receives.
Define the coefficient of earth pressure as used in foundation
At a specified point on a highway, vehicles are known to arrive according to a Poisson process. Vehicles are counted in 20-s intervals, and vehicle counts are taken in 120 of these time intervals.
The water table is at a depth of 1 m. Compute the effective normal stress and the shear stress acting on a plane rotated 60 degrees clockwise from the horizontal at a depth of 2.5 m in this deposit.
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