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A heat pump with a COP (coefficient of performance) of 2.8 is used to heat an air-tight house. When running, the heat pump consumes 5 kW of power.
The pair of blocks, which are connected by a cord, are released from rest when the spring is unstretched.
A 1.2ft diameter ball is thrown onto a rough surface, such that it has a velocity of 6ft/s and a backspin angular velocity of w.
Calculate the second moment of area of the bar and use this to estimate the modulus of a composite material that will just meet the design specification.
An impulse air turbine rotor with a blade speed (U) of 300 m/s is measured to have a relative rotor inlet velocity (W_1) of 750 m/s.
A four-wheel truck that has a mass of 5,000 kg accelerates forward. The coefficient of friction for the front and back wheels is 0.2 and 0.4.
Determine the mass moment of inertia about the y axis. The thin plate has a mass of 0.1 slug and thickness of 0.05 in.
The steam from the nozzles of a single wheel impulse turbine discharges with a velocity of 600 m/s at an angle of 20 degrees.
Sketch the fully annotated velocity triangles for a Parsons turbine stage. Use your sketch to show that the specific work produced per stage.
Steam at 15 bar and 350 degrees C is expanded through a 50% reaction turbine to a pressure of 0.14 bar.
A large Yo-Yo that weighs 50 lb is released from rest. Its moment of inertia, I is 0.24 slug-ft2. How long does it take the center of the Yo-Yo to fall 4 ft?
The slender bar with a mass of 4 kg is released from rest at an angle of 35 degrees. What is the angular velocity of the bar when it is vertical?
Which of the advanced machining process causes thermal damage? What is the consequence of such damage to work pieces?
For a vertical spring/damper system with mass (M) and a harmonic forcing function, Fmax Cos [omega x t].
How many layer of winding can be decreased so that the part will be still safe? Or if not, how many more layer needed to be added?
A 3.14insq. cross sectional area steel tension rod carries a load of 3140lbf. How to calculate the tensile stress in the rod?
A linear isotropic material has the shear modulus of elasticity G of 11.5*10^6 psi and the Poisson's constant v of 0.3.
The state of plane stress at a point in a member is zx=-20MPa, zy=90MPa, txy=60MPa. How to find the principal stresses zx and zy?
How to determine the rotating bending specimen's endurance limit at 10^6 cycles?
How to determine the endurance limit for the part if the Marin modifying factors are: ka=0.887, kb=1, kc=0.889, kd=ke, kf=1?
A shaft is subjected to a completely reversed bending stress such that Xmax=40kpsi and Xmin=-40kpsi.
How to determine the shear stress in the weld for a shearing force of 15000 lbf?
Determine the fraction of the radiation leaving the base of the cylindrical enclosure shown attached that escapes through a coaxial ring.
The roof truss shown attached is roller and pin-joint supported at the right-hand and left-hand ends respectively and carries loads of 10kN, 8kN and 12 kN.
Two co-axial shafts are to be connected by a flanged coupling having six 6mm diameter bolts equally spaced on a PCD of 200mm.