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Glycerin at 50 degrees F flows over a flat plate at free stream velocity of 6 ft/s. Determine the velocity and thermal boundary layer thickness 0.5 ft from the leading edge of the plate.
Your favorite physics book (total mass 2.4kg) is pushed across the floor at a constant speed by a force of F=26N at an angle of -42 degrees (aiming downward 42 degrees below the horizontal).
Determine the persons mass: b) Explain what would happen if the elevator was accelerating downward such that A is greater than or equal g: Justify your answer via newtons laws.
What is the composition of the gas in terms of mass fractions? What is the composition of the gas in terms of volume fractions?
A flywheel has its angular speed increased uniformly from 16rad/s to 70rad/s in 74s. If the flywheel has a diameter of 2 ft, determine the magnitude of the normal and tangential components of accel
Determine the final air pressure and temperature, and the final position of the piston (i.e. the distance between the bottom of the cylinder and the bottom of the piston, in the final state).
A tank contains 0.05m^3 of Nitrogen (R=0.2968kj/kg*k) at T=-21 degrees Celcius and P=10MPa. Assume a non-ideal gas. Find the mass of Nitrogen using data from the compressibility chart.
Water at 3 MPa and 160 degree C is produced from water at 2. 5 MPa and 40 degree C in an irreversible process at a rate of 5. 6 kg/s. Find the rate of entropy change of the process (kW/K).
The engine produces 75 kW of power and rejects heat into the cold reservoir at a rate of 9 kW. (a) Find the efficiency of the heat engine, (b) Is the engine reversible?
A heat engine of 30% thermal efficiency drives a refrigerator having a coefficient of performance of 4. Determine the ratio of the heat input to the engine to the heat remove from the cold body by
Consider a waterfall having a drop of 84.7m. (a) Determine the specific potential energy (J/kg) of the water at the top of the falls with respect to the base of the falls.
The work input to a steady flow water pump is 4500 J/kg, with the water entering the pump at 1 bar and 30C. Determine the exit pressure if the fluid temperature increases by 0.1 C during the process.
Determine the capacity of the steam-generating unit in MW using the expression of steady state, steady flow conservation of energy.
Write an expression for the heat transfer rate per unit length, Q/L, between the pipe surface temperature and the outer insulation surface temperature.
What is the tolerable tensile load, in N, to avoid catastrophic failure? The panel is 200 mm in width, 2 mm in thickness. The geometry correction factor is 1.0 for internal cracks, 1.1 for surface c
The mass flow rate is 0.1 kg/s. If the compressor power input is 77 kW, determine the rate of heat transfer between the compressor and its surroundings, in kW. Neglect kinetic and potential energy e
If the process is isentropic determine the exit pressure in kPa. Also, determine the exit pressure if the fluid temperature increases by 0.1 C during the process.
Find: a) the net actual work, b) the isentropic efficiency of the turbine, c) the ideal Rankine thermal efficiency, d) the actual Rankine thermal efficiency, and e) the relative efficiency.
The inlet temperature is 25 C and it exhausts to the room at 100 kPa. What is the necessary inlet pressure and the exhaust temperature of the air? Assume the turbine is adiabatic and air has constan
What is the nozzle inlet pressure and temperature. Assume the inlet kinetic energy is negligible and assume the specific heats are constant at the 300 K value.
Assuming the compressor is adiabatic and that the isentropic efficiency of the compressor is 70% determine the exit pressure and the power input required to drive the compressor. Account for variabl
How long after the snap until the cart has a velocity of 30 ft/s down the incline? the cart has a mass of 500 kg and the coefficient of friction is .5.
Two states of water (H2O) are given as: Initial state: 25C, 100 kPa Final state: ideal gas at 1800C Determine the change in specific enthalpy and specific internal energy.
Air with a volume of 0.5 m3 under the piston is heated so that the piston moves up. Find the total heat transfer to the air when the piston has been pushed up to the top end of the cylinder.
A fatigue test is made with a mean stress of 17,500 psi (120 Mpa) and a stress amplitude of 24,000 psi (165 Mpa). Calculate (a) the maximum and minimum stresses.