Start Discovering Solved Questions and Your Course Assignments
TextBooks Included
Active Tutors
Asked Questions
Answered Questions
Describe on your own words the three strengthen mechanism for metals (i.e. grain size reduction, solid solution strengthening and strain hardening). Be sure to explain how dislocations are involved in
Consider a model of a bone with a cemented prosthesis, where the outside radius of the bone is ro, the radius of the medullary cavity is rm, and the radius of the prosthesis is rp.
A beam having the cross-section shown is subjected to the a vertical shear V.
A catheter is a specialised needle intended for long-term insertion into a vein in a patient's arm. Engineers are redesigning them to cause less discomfort and damage.
Consider a cylinder transistor diameter 0.4 cm and length 0.5 cm that dissipated 0.2W power onto 30C transistor.
The launch vehicle takes the moon orbiter to a circular orbit around the Earth at 300km altitude. The orbiter is to perform a Hohmann transfer to a Lunar orbit, entering into a circular lunar orbit at
In order to increase production rate, a reactor setpoint was increased from 160 psig to 190 psig. The reactor pressure transmitter was recalibrated from 0– 200 psig to 0– 300 psig. What is
A horizontal cantilever of length L supports a load W, uniformly distributed along its length. the cantilever is proped to the level of the fixed end at a distance 3/4 L from that end. Determine the l
The 2 Mg car increases its speed uniformly from rest to 25 m/s in 30s up the inclined road. determine the maximum power that must be supplied by the engine, which operates with an efficiency of 0.8. a
Consider a magnet moving in a coil of N, turns. This system can be modelled as mass spring damper system. The damping coefficient consist of both mechanical and electromagnetic damping.
A 2.9 kg collar is free to slide on a rough rod rotating in the horizontal plane. The collar's radial position along the rod is governed by r(t) = (0.10+0.32et) m, and its angular position is describe
The compression ratio of an ideal dual cycle is 14. Air is at 100 kPa and 300 K at the beginning of the compression process and at 2200 K at the end of the heat addition process.
A steel beam of total length 3m is simply supported at the ends by pin-jointed supports A and C. A diagrammatic representation of the loading system is depicted at figure QA1.
The material hoist and the load have a total mass of 900 kg and the counterweight C has a mass of 150 kg. At a given instant, the hoist has an upward velocity of 4 m/s and an acceleration of 1.2 m/s^2
A rigid tank contains 20 lbm of air at 20 psia and 70°F. More air is added to the tank until the pressure and temperature rise to 35 psia and 90°F, respectively.
Consider the brass alloy the stress-strain behavior of which is shown in the Animated Figure 6.12. A cylindrical specimen of this alloy 24 mm in diameter and 186 mm long is to be pulled in tension
An FCC iron-carbon alloy initially containing 0.20 wt% C is carburized at an elevated temperature and in an atmosphere wherein the surface carbon concentration is maintained at 1.0 wt%.
An air compressor takes air from outdoors at 28deg C and 101.2kPa and compresses it to 790kPa and 50 deg C. The air input to the compressor is found to be 22.67m3/hr.
The coeficient of discharge is 0.97. calculate the rate of flow in the main in m3/hr if the diffrence in levels piezometers connected to the throat and inlet tapping is 25.4cm.
Oxygen is flowing through a nominal 2 inch schedule 40 steel pipe pipe at a velocity of 10 ft/s. The oxygen is at a fairly constant pressure of 50 psia and at a temperature of 90 deg F.
A storage tank holds 75 cubic meters of a gas at 28deg C and a pressure of 130kPa. The gas appears to have a molecular weight of 30 from tests run in a laboratory.
A Rankine cycle is to drive an electric generator to produce 600 MW of electricity. The generator is 95% efficient. The boiler is producing steam at 1450 psi and 900 deg F.
A motorist enters a freeway at 36 kph and accelerates uniformly to 90 kph. From the odometer in the car, the motorist knows that she traveled 0.20 km while accelerating.
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 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