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Determine the exit velocity, in ft/s, and the exit temperature, in degrees F, if the ratio of inlet to exit pipe diameters, d1/d2, is 0.64.
A system of equivalent mass, 30kg has a natural frequency of 120rad/sec and damping ratio of 0.12. The system is subject to harmonic forcing with an amplitude of 2000N and frequency of 150rad/sec.
Using the ideal gas model for air, and assuming isothermal conditions in the tank, derive an expression for the pressure in the tank as a function of time.
A steel ring of 250mm diameter has a width of 50mm and a radial thickness of 5mm. It is split to leave a narrow gap of 5mm wide normal to the plane of the ring. Assume the radial thickness to be sma
The pressures of the nitrogen are low enough to treat it as an ideal gas. Determine the velocities of the nitrogen upstream and downstream from the valve.
A vertical jet of water leaves a nozzle at a velocity of 10 m/s and a diameter of 20 mm. It suspends a plate having a mass of 1.5 kg. What is the vertical distance h?
An ideal Diesel cycle with air as the working fluid has a compression ratio of 20 and a cutoff ratio of 1.3. Determine the thermal efficiency of the cycle
The critical heat flux of water at 1 atm is q''max =1258.7 kW/m which occurs at ?T = 30C. Boiling enters the transition boiling regime when the excess temperature is increased further. Estimate the
Find the stress and the strain in all three dimensions when compressed. Then, find the force on the die, according to the maximum shear stress criterion and according to the distortion energy crite
Basically a block is slid down from left side of the circle and when it reaches the middle of the bottom the speed of the block is √(2Rg). the block has mass m. What is the force applied the g
For the ideal air standard diesel cycle with a volumetric compression ratio of 17: 1, calculate the efficiencies for cutoff ratios of 1,2, and 4. Take y = 1.4.
Determine the stresses acting on an element inclined at 45 degrees. Show this element properly oriented with the associated stresses.
If a 10-kg box is dropped from a height of 0.5 m above the pan, determine the maximum vertical displacement d. Initially each spring has a tension of 50 N.
The diameter of the hollow core of a solid-propellant grain remains axially uniform during burning. The length is 5 m, and initially its inner diameter is 0.37 m; the outer diameter of the grain is
A refrigerator with an avg COP of 2.8 is used to cool a container with contents equal to 12kg of water from 40deg to 10deg. When running the fridge uses 400w of power. How long will it take to acco
Consider a supersonic flow of free stream velocity of Mach 3 is flowing over a diamond-wedge airfoil with half angle ε=10 degrees and air foil has angle of attack of α=15 deg. Calcula
Determine the center and surface temperatures of the apples in 1 hr. Also, determine the amount of heat transfer from each apple.
The turbine of a steam power plant operating on a simple ideal Rankine cycle produces 1750 kW of power when the boiler is operated at 800 psia, the condenser at 3 psia, and the temperature of the tu
Air at a pressure of 400KPa and a temperature of 700 degree Celsius expands in a turbine at steady state to a pressure of 100KPa. The work output is 260KJ/Kg, and the heat transfer from the turbine
Find area (m2) at the exit of the diffuser. What is the rate of heat transfer (kW) for the diffuser? Is the heat transfer into or out of the diffuser?
What is the moment as the bottom of a telegraph pole that is 50m high adn 25cm in diameter in a 34m/s wind? The atmospheric pressure is 101kPa, and the temperature is 20 C.
The vale is open and the two gases are allowed to mix thoroughly until both the temperature and pressure are the same in both tanks. a) Determine the final temperature and pressure.
The radiator of a car is a heat exchanger that uses air to cool the coolant (assume water) from the engine. The heat that must be transferred to the air is 150 kW and the coolant experiences a 10 C
Air is compressed in a piston-cylinder device from 90 kPa and 22 deg Celsius to 900 kPa in a reversible, adiabatic process. Determine the final temperature and the work done during this process, ass
Sketch a fatigue crack growth curve based on the Paris law. How does a change in the ratio of the minimum stress/maximum stress affect the threshold values?