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A concrete pier of square cross section is 6m high. The sides taper uniformly from a width of 0.5 m at the top to 1.0 m at the bottom.
A Schottky diode and pn-junction diode have cross-sectional areasof 10-4cm2. The reverse saturation current density of the Schottky diode is 5*10-8A/cm2 and thereverse saturation current density of
A hydraulic shear applies 2000 lb force to a wedge. It is used to shear plate steel to rough size. The shear has a 1/4 inch thick cutting blade with a 45 degree slope. What is the ideal mechanical adv
Consider a Cartesian co-ordinate system on a plane (the plane lines on the x- and y-axis). A current of 100 A is flowing up out of the plane at the origin. Find the MMF drop between the point x=
The diffusion constant (Do) and activation energy (Q) of C in BCC Fe is 0.01 cm2/sec and 80kJ/mol respectively. In FCC Fe, the values are 0.21 cm2/sec and 148kJ/mol.
Assume initially that the demand and supply for premium coffees (one-pound bags) are in equilibrium. Now assume Starbucks introduces the world to pre- mium blends, and so demand rises substantiall
The total cross-sectional area of the inlet to the jet engines is 20 ft2. Assume that the flow properties of the air entering the inlet are those of the freestream ahead of the airplane.
What is the difference between "Introduction to Computer Communication Networks" course and computer networks course? do they have the same material?
Calculate the static thrusts of the rocket and turbojet engine described in the figure. The thrust T is the force necessary to prevent horizontal movement of the engine.
Rayleigh Scattering. Calculate the % increase is attenuation due to Rayleigh scattering exhibited by light having a free-space wavelength 1535 nm as compared to light having a free space wavelen
A simple U-tube manometer is installed across an orifice meter. the manometer is filled with mercury(specific gravity 13.6), and the liquid above the mercury is carbon tetrachloride (specific gravity
A point charge Q is located at (0,-4,0) while a 10nC charge is uniformly distributed along a semicircular ring as shown in Fig. 4.25 (semi circle in the xy plane from x= -2 to x =2, y=2) Find th
Consider some hypothetical X+ - Y - ion pair for which the equilibrium interionic spacing and bonding energy values are 0.38 nm and - 6.22 eV respectively.
During an AP, the membrane potential typically moves from -70mV to +20mV and back again. In a cell with 10um radius and 1uF/cm^2, how many charges need to move across the membrane (and back agai
A wheel barrow is used to lift a 200 lb load. The length from the wheel axle to the center of the load is 2 ft. The length from the wheel and axle to the effort is 5 ft. 5. What is the ideal mechanica
A micrometer caliper is used to measure the diameter of a bolt and a reading of 0.768 inches is obtained. Based on this measurement, find the smallest possible diameter and the largest possibl
An Industrial water shutoff valve is designed to operate with 30lbs of force and will encounter 200lbs of resistance force applied to a 1.5in diameter axle. What is the required actual mechanical adva
The 2.4m wide portion ABCD of an inclined, cantilevered walk-way is partially supported by members EF and GH. Knowing that the compressive force exerted by member EF on the walkway at F is 24.3kN, det
The 18 kg block starts from rest and moves upward when constant forces of 20 N and 40 N are applied to supporting ropes. Neglecting the masses of the pulleys and the effect of friction, determine the
A variable force and appropriate energy transfers are applied to the piston so that the water temperature remains constant as the water expands to a final volume of 14.303 m3.
A medical technician uses a pair of four inch long tweezers to remove a wood sliver from a patient. The technician is applying 1 lb of squeezing force to the tweezers.
Assume that the passengers arrive at a taxi stand according to a Poisson process with parameter λ. There are m taxis serving to the passengers in the queue. Each taxi serves a single custo
When conducting an energy audit before sizing a renewable energy system, why should efficiency measures be considered before investment in energy generation?
A steam turbine is operated ith an input temp of 800C and exhaust temp of 150C. What is the maximum amount of work the turbine can do for a given heat input Q?
Two particles A and B start from rest at the origin s = 0 and move along a straight line such that aA = (6t-3)ft/s2 and aB = (12t2-8)ft/s2, where t is in seconds.