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A man stands out at the end of diving board, which is supposed by two spring A and B, each having a stiffness of k=15kn/m. in the position shown the board is horizontal.
Two wooden members of 80 × 120-mm uniform rectangular cross section are joined by the simple glued scarf splice shown. Knowing that β = 25° and that centric loads of magnitude P = 10
Calculate the change in the enthalpy and the change in entropy when one mole of SiC is heated from 25 degree Celcius to 1000 degree Celcius.
What is the maximum possible power per unit mass flow rate (J/kg) that a hydroturbine can produce at this site? What mass flow rate of water is required to produce 100 MW of shaft power?
A four stoke eight cylinder Otto engine operates at 2500 rpm, and the compression ratio is 6:1. the cylinder volume is 2000 cm^3 befrore compression, and the intake air is at 100 kPa and 30 degrees
Suppose that a nickel filter is required to produce an intensity ratio of Cu K alpha to Cu K beta of 100/1 in the filtered beam. Claculate the thickness of the filer and the transmission factor for
An ideal gas at 100 kPa and 15 degrees C enters a steady-flow compressor. The gas is compressed to 600 kPa, and 10% of the mass that entered the compressor is removed for some other use.
A particle moves along a straight line with a velocity v = (200s)mm/s, where s is in millimeters. Determine the acceleration of the particles at s = 2000 mm. How long does the particle take to reac
A nozzle is used to increase the velocity of superheated water vapor. Calculate (a) the exit velocity of the steam, and (b) the mass flow rate of the steam if the nozzle exit area is 0.001 m^2.
A simply supported nonmetallic beam of 0.25-m height, 0.1-m width, and 1.5-m span is subjected to a uniform loading of 6 kN/m.
Determine the pressure at which condensation first occurs, in MPa, the fraction of total mass that has condensate when the temperature reaches 100 °C nd the heat released during the process.
A circular shaft of 120-mm diameter is subjected to end loads P = 45 kN, M = 4 kN.m, and T = 11.2 kN.m. What is the factor of safety, assuming a failure to occur in accordance with the octahedral s
What is the velocity of flow into the pipe line? What is the velocity of flow into the filter? If the density of the pipe line gas is .0064 gms/cm^3 what is the density of the gas at the filter inpu
In addition to driving the air compressor, the turbine drives a generator. How much power does the compressor require from the turbine? How much power is left over for the generator?
Determine the net force acting on block A. Using Newton's 2nd law, formulate the equation of motion for block A and solve for its acceleration.
Consider a building whose annual air conditioning load is estimated to be 120,000 kWh in an area where the unit cost of electricity is $0.10/kWh. Two air conditioners are considered for the building
Refrigerant-134a enters the condenser of a residential heat pump at 800 kPa and 35 degrees C at a rate of 0.018 kg/s and leaves at 800 kPa as a saturated liquid.
The compressor of a refigerator compresses saturated R-134a vapor at -10 C to 800kPa. how much work does this require when the process is isentropic?
Determine the rate of entropy generation (i.e. irreversibility) assuming the ambient temperature is 70 °F. You may neglect the combustion products (exhaust) in your analysis. Your result shoul
The diameter at the point of fracture is 10.1 1 mm (0.398 in.), and the fractured gauge length is 55.75 mm (2.195 in.). Calculate the ductility in terms of percent reduction in area and percent elon
An 8 ft3 tank contains air at an initial temperature of 80F and intial pressure of 100psi. The tank develops a small hole, and air leaks from the tank at a constant rate of .03 lb/s for 90s until th
Find the specific flow exergy in and out of the steam turbine in Example 9.1 assuming an ambient at 293 K. Use the exergy balance equation to find the reversible specific work. Does this calculatio
Determine Radial and tangential stresses as functions of r. Calculate these stresses at a minimum of 7 radial positions and plot your results.
Assume this can be done in a reversible process by the use of heat engines and neglect kinetic energy changes. Find the water exit temperature and the power out of the heat engine(s).
The valve is opened and heat is transferred so that the water comes to a uniform state with a total volume of 1.006 m3. Find the total mass of water and the total initial volume. Find the work and t