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A thin 20-cm X 20-cm flat plate is pulled at 1 m/s horizontally through a 3.6-mm-thick oil layer sandwiched between two plates, one stationary and the other moving at a constant velocity of 0.3 m/s, as shown in Fig. P2-45. The dynamicviscosity of oil is 0.027 Pa . s. Assuming the velocity in each oil layer to vary linearly,
(a) plot the velocity profile and find the location where the oil velocity is zero and
(b) determine the force that needs to be applied on the plate to maintain this motion.
Calculate the minimum natural frequency of a hydraulic cylinder (L = 25 cm and D = 4 cm) connected to a 45 kg load when the hydraulic fluid is (a) an oil with B = 1.7 GPa and (b) water with B = 2.2 GPa.
the rods ab and cd each have a 30-mm diameter and are 1m long. the modulus of the rods is 28 gpa. the rods are
the aim of this demonstration is to use measurements of the load required to propagate a crack tear in packaging tape
A river flowing steadily at a rate of 240 m3/s is considered for hydroelectric power generation. It is determined that a dam can be built to collect water and release it from an elevation difference of 50 m to generate power. Determine how much po..
A spherical steel pressure vessel (diameter 480 mm, thickness 8.0 mm) is coated with brittle lacquer that cracks when the strain reaches 150 × 10-6 (see figure). What internal pressure p will cause the lacquer to develop cracks? (Assume E = 205 GP..
Determine the phase or phases in a system consisting of H2O at the following conditions and sketch p-v and T-v diagrams shown the locations of each state?
A Brayton gas turbine cycle has two stages of compression and two stages of expansion. The pressure ratio across each stage of the compressor and turbine is 3. The air enters each stage of the compressor at 300K and each stage of the turbine at 1200K..
Determine (a) the temperature of the air at the compressor exit, in 8C, and (b) the heat transfer, in kJ per kg of air flowing. (c) Sketch the process on p-y and T-s diagrams and associate areas on the diagrams with work and heat transfer, respect..
Ideal vapor-compression refrigeration cycle, An ideal vapor-compression refrigeration cycle, with ammonia as the working fluid, has an evaporator temperature of -20c and a condenser pressure of 12 bar
in a design test of penetration resistance a 12-gram bullet is fired through a 400-mm stack of fibrous plates with an
a frictionless piston -cylinder device contains saturated liquid water at 200 kpa pressure. now 450 kj of heat is
the baseball player a hits the baseball with va 40 fts and thetaa 52circ. when the ball is directly above of player b
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