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A mortar gun, with a maximum range of 40 m on level ground, is placed on the edge of a vertical cliff of height 20 m overlooking a horizontal plain. Show that the horizontal range R of the mortar gun is given byR = 40{sin α + (1 + sin2 α)1/2} cos α,where α is the angle of elevation of the mortar above the horizontal.
[Take g = 10 m s-2.]
Evaluate R (to he nearest metre) when α = 45° and 35° and confirm that α = 45° does not yield the maximum range.
Calculate the corrosion rate in mpy, pm/y, and mdd. What is the ranking of this carbon steel in this acid environment and determine the effect of time on the solution corrosiveness and the carbon steel corrodibility.
Design a variable-gain analog amplifier. The analog input is Vin, the 3-bit digital inputs (connected to a microcomputer output digital output) are B2, B1, B0, and the analog output is Vout. Exactly one of the digital inputs will be 1, and the gai..
Not including the effect of stress-concentration, what are the minimum allowable diameters for segments AB and BC to achieve a safety factor of 3?
packages are thrown down an incline at a with a velocitynbspof 1 ms. the packages slide along the surface abc to
one surface of a 12-cm-thick slab thermal conductivity k2.5 wm. degree c is maintained at 100 degree c. the other
estimate the drag of a thin square plate 3m by 4m when it is towed through water 10 oc. assume a towing speed of about
Calculate the natural frequencies and mode shapes of a shaft in torsion of shear modulus G, length l, polar inertia J, and density ρ that is free at x = 0 and connected to a disk of inertia J0 at x = l.
Draw a crank phase diagram for a three-cylinder inline engine with a 0, 120, 240°
Determine the rate of energy consumption by the burner and the unit cost of utilized energy for both electric and gas burners.
Silicon rubber has a Poisson’s ratio of 0.4. Consider a silicon rubber drain hose for a surgical procedure; the hose has an outer diameter of 4 mm and a wall thickness of 0.5 mm. How much does the lumen (interior space) of the catheter constrict if t..
Gas streams containing hydrogen and nitrogen in different proportions are produced on request by blending gases from two feed tanks: Tank A (hydrogen mole fraction = xA) and Tank B (hydrogen mole fraction = xB). The requests specify the desired hy..
When the lights are turned off in a building, an exit door light is to remain on for an additional 2 min, and the parking lot lights are to remain on for an additional 3 min after the door light goes out. Write a program to implement this process
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