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A rectangular gate of 1m wide is hinged at its top edge, shown as bellow. There is water at the right hand side of gate; the water is at the same level as the hinge. On the top of the water at the r
Calculate the total Dv required to transfer between two coplanar circular earth orbits of radii r1 = 2 DU and r2 = 5 DU respectively using a transfer ellipse having parameters p = 2.11 DU and e = 0.
The old style heating uses steam (or hot water) in an radiator to heat a room in winter time. A radiator can be considered as a vertical surface 0.5 meter high and 1 meter wide. The surface temperat
Air at 15 ? C ?ows over a ?at plate. A heater strip 10 cm long is placed on the plate at a distance 15 cm from the leading edge. The local heat transfer coe?
The average plate temperature of a ?at plate of length L with constant heat ?ux with air at 20? C ?owing over it at a certain velocity was found to be 50 ? C. What is the temperature at the trailing
A steady flow of 15 kg/s of high-pressure liquid oil drives a hydraulic motor at the steady-state-steady-flow conditions shown below. Find the diameter of the exit pipe, and the power output, Wcv &am
At the same time, measurements showed that the pipe elongated by 0.35 mm in a 200 mm gauge length. Determine the depth at which the pipe was stuck. Assume the cross-section of the pipe is constant w
Exhaust gases enter the regenerator at a pressure of 140 KPa, temperature of 800 K and leave at a pressure and temperature of 130 KPa and 600 K. Treat exhaust gases as air.
When the rope it at an angle of 30 degrees the 2 lb sphere A has an initial speed of 2 ft/s. The coefficient of restitution between A and the 4 lb wedge B is 0.8 and the length of the rope l=3ft.
When the field is turned off, the electron beam hits the center of the screen. Ignoring relativistic corrections, what field magnitude is necessary to deflect the beam to the side of the screen?
The water velocity is 20 cm/s. The inside heat transfer is in the turbulent region and you can use the Dittus-Boelter Equation to calculate the heat transfer coefficient. Calculate the heat transfer
A two-dimensional jet in the form of a liquid sheet is turned through an angle of 30 degrees by a curved vane. Derive an expression for the restraining forces required t hold the vane stationary.
Neglecting variations in the height of the vapour column in the tube during evaporation, determine how long it will take for the solvent to evaporate completely.
Determine the centerline temperature of a second beam that is of the same size and exposed to the same conditions as in part (a) but fabricated of lightweight aggregate concrete with density.
If the unstretched length of the spring is 5 in., determine the spring constant k required for equilibrium in the position shown.
Derive an equation relating y to the fiber volume fraction and the fiber surface/volume ratio. Make a plot of y vs fiber volume fraction for single-walled carbon nanotubes (~1.3 nm).
A piston-cylinder device contains 6kg of H2 and 21 kg of N2 at 160 K and 5 MPa. Heat is now transferred to the device, and the mixture expands at constant pressure until the temperature rises to 200
Calculate the total work output, ideal efficiency, mean effective pressure and the theoretical power output at a peak 5800 rpm (assuming 3 of the 6 cylinders are delivering the power stroke during e
The disk in a computer hard drive spins at 7200 rpm. At the radius of 30 mm, a stream of data is magnetically written on the disk, and the spacing between data bits is 25 µm. Determine the nu
Expansion occurs to a state with a pressure of 200 kPa. During the process, P*v = constant. Determine the work and heat, per unit mass, in KJ/kg.
Determine the magnitude of the reaction force FA in the steel rod after the load has been applied. Assume section AB of the rod is in tension.
Consider a fluid (of density ?) inincompressible, laminar flow in a plane narrow slit of lengthL and width W formed by two flat parallel wallsthat are a distance 2B apart. End effects may be neglect
Calculate the speed of an iceberg driven by wind on its exposed (not submerged) surface. Model the iceberg as a cylinder with 1/9 of its length exposed to wind and the rest submerged in water (assum
Find a mathematical expression for each of the following: Effective True Stress considering plane stress conditions Effective True strain considering true stress conditions.
What would happen if you place a 1m by 2 m sheet of aluminum (extruded) and place it on the roof of your car driving at 35 mph? Assume the plate is aligned with the direction of the relative wind.