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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.
The compressed liquid water enters the desuperheater at 5MPa, 40 degrees centigrade. Water exits the desuperheater as 4.5Mpa saturated vapor. Find the required mass flow rate of the compressed liq
A ship's hull is 150m long as has a wetted area of 5000 m^2. When it is encrusted with barnacles, it requires 7000 hp to overcome friction drag and move at 15 knots in seawater at 20C. What is the a
The heat transfer from the compressor to the surroundings is 0.63 kW. Include the change in the kinetic energy of the R-134a and compute the power input needed to operate the compressor.
The centerboard of a sailboat is 2.5m long and has a chord of 1m. Approximate the centerboard as a flat plate in water at 20C to compute the drag when the boat sails at 15 knots.
The thin-walled pipe has an inner diameter of 0.5 cm and a thickness of 0.025 cm. If it is subjected to an internal pressure of 5 MPa and the axial tension (200 N) and torsional loadings (2 N.m) sho
The pressure at the exit of the turbine is 10 kPa, and the turbine operates adiabatically. Liquid leaves the condenser at 8 kPa, 36oC. The pressure is increased to 8.6 MPa across the pump. The turbi
A circular steel bar is axially loaded. It has a diameter of 2 in., a modulus of elasticity of 29x10^3ksi. When the load F is applied, determine load F.
Nitrogen gas enters a diffuser at 100 kPa and 110 degrees C with a velocity of 205 m/s and leaves at a 110 kpa and 45 m/s. It is estimated that 2.5 kJ/kg of heat is lost from the diffuser to the sur
A piston cylinder device initially contains 0.6 kg of steam with a volume of 0.1 m3. The mass of the piston is such that it maintains a constant pressure of 800 kPa.
What frequency does the changing voltage (AC voltage) across the gap need to have in order to match up with the protons and ensure they are accelerated each time they encounter the gap.
The suspension of an automobile can be approximately by the simplified spring-dashpot determine and plot the amplitude system.
A four-cylinder engine with a 9.5-cm bore and an 8.75-cm stroke has a 7 % clearance. The engine rotates at 2500 rpm. The conditions at the beginning of compression are 17 celsius degrees and 98 kPa.
The initial pressure is 39kPa and the initial temperature is 15 deg celcius. Find the final temperature, pressure of the gas and find the work done to compress the gas.
Express p in terms of F,D, and Poisson's ration v for the rubber. What is the apparent modulus of elasticity (sigmay/epsilony) in terms of the modulus of elasticity E and Poisson's ratio of rubber?