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Heat in the amount of 100 kJ is transferred directly from a hot reservoir at 1200 K to a cold reservoir at 600 K. Calculate the entropy change of the two reservoirs and determine if the increase of
Combustion products with the molar anaylisis of 10% CO2, 20% H2O, 70% N2 enter an engine's exhaust pipe at 1000F, 1atm and are cooled as they pass through the pipe, exiting at 100F, 1atm.
If the static and kinetic friction coefficients between the incline and the spool are us= 0.43 and uk= 0.3, respectively, determine the acceleration of G, the angular acceleration of the spool, and
A 1 kg block of copper at 350°C is quenched in a 10 kg oil bath initially at ambient temperature of 20°C. Calculate the final uniform temperature (no heat transfer to/from ambient) and the
The extraction steam from the turbine enters the heater at 4 MPa, 275°C, and leaves as saturated liquid. What is the required mass flow of the extraction steam (kg/s)?
A vertical piston cylinder arrangement with a piston mass of 60 kg with a face area of 150 cm square, contains 5 grams of air. The initial volume occupied by air is 6 liters.
If a concentration of 0.00005 parts per million (ppm) exist in the water, the conctration is magnified to what concentration (ppm) in a fish-eating birds like an osprey?
Body A has a mass of 50 kg while the mass of body B is 20 kg. A force F = 500 N is applied to body A parallel to the plane. Assuming that the plane is smooth, determine the least coefficient of fri
An air-water vapor mixture enters an adiabatic saturator at 30 degree C. Determine the relative humidity and the humidity ratio of the inlet mixture.
The axial compressor has a stage temperature rise of 30K, using a 50% reaction design with a stator outlet angle of 20. If the mean diameter of each single is 25cm and each stage is identical, calcu
Find the mass flow rate for each turbine (not necassirly the same), and the rate of entropy generation in each turbine and the mixing chamber. You may assume that each turbine is adiabatic.
An axial flow compressor stage has blade root,mean and tip velocities of 150,200 and 250 m/s. The stage is to be designed for a stagnation temperature rise of 20K and axial velocity of 150 m/s, both
Initially, the rope is entirely wrapped around the cylinder and the bucket is at rest. Find a symbolic expression for the acceleration of the bucket as it falls down the well.
A ship has an engine that rotates clockwise when viewed from the front. It has an effective moment of inertia of 250 kg m2 and rotates at 400 rev/min. Calculate the magnitude and effect of the gyros
The system contains a sharp-edged entrace, 6 threaded 90 degree elbows, and a sharp edged exit. Determine the required pipe diameter for the given flow conditions. Assume the SG
The automatic transmission in a car receives 25 kW shaft work and gives out 24 kW to the drive shaft. The balance is dissipated in the hydraulic fluid and metal casing, all at 45oC, which in turn tr
Estimate the pressure drop across the honeycomb. the density of the air is 1.12 kg/m3 and the kinematic viscosity is 1.5E-5 m2/s. You may neglect inlet and outlet minor losses.
A beam that lies horizontal is subject to vertical loads resulting in maximum moment of 431 kn.m. The cross section of the beam is rectangular with the base width of 72 mm.
Calculate the rate of heat transfer from the water to the evaporating liquid. The dimensions are: L = 1.2 m, D1 = 3.6 cm, and D2 = 4.9 cm.
A heat engine has a solar collector receiving 600 Btu/h per square foot inside which a transfer media is heated to 800 R. The collected energy powers a heat engine which rejects heat at 100 F. If t
Air is used as the working fluid in a simple ideal Brayton cycle that has a pressure ratio of 12, acompressor inlet temperature of 300 K, and a turbine inlet temperature of 1000 K.
A torque T is imposed at the ends. The maximum shearing stress in the brass is limited to 25 MPa. Find the largest Torque that can be applied.
A four-cylinder, four-stroke, 2.2-L gasoline engine operates on the Otto cycle with a compression ratio of 10. The air is at 100 kPa and 60°C at the beginning of the compression process, and the
How would the natural frequency be analyzed? Assume that the weight density of steel is 76.8 kN/m3 and its elasticity is 2.07 x 1011 Pa.