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Hydrogen gas at 2 atm and 27C is flowing in a neoprene tube 3 mm inside diameter and 11 mm outside diameter. Calculate the leakage of hydrogen through a tube 1 m long in kg mol/s at steady state.
How do you estimate the true strain at the tensile strength condition given only a simple stress-strain curve of a material? Could you please show a simple example with numbers?
The design requires that if temperature increases by 1degreeC, the mercury column in capillary increases by 1cm at least. What is the maximum diameter of capillary?
Derive the variation of transmitted X-Ray intensity as a function of Incident intensity, thickness, density and mass absorption coefficient.
Christian Huygens (1629-1695), the greatest clockmaker in history, suggested that an international unit of length could be defined as the length of a simple pendulum having a period of exactly 1 s.
Calculate the escape speed from the Earth for a 4800 kg spacecraft and determine the kinetic energy it must have at the Earth's surface to move infinitely far away from the Earth. What is its orbita
Calculate the mass of the Sun noting that the period of the Earth's orbit around the Sun is 3.156 107 s and its distance from the Sun is 1.496 1011 m.
Using the known radius of the Earth and that g = 9.80 m/s2 at the Earth's surface, find the average density of the Earth. Determine the average density of the planet.
What is the weight of the space station when in orbit? At what altitude is the space station's weight 65% of its value on Earth's surface?
What is the acceleration of the helicopter? Neglecting stiffness, how long does it take for a signal to reach the helicopter if it accelerates at 0.750 m/s2 upwards? t = s.
The torque is found to have the same magnitude but in the opposite direction of the torque found there. What are the components of the force?
At the exit, the pressure is 0.1 bar, the quality is 0.9 (90%), and the velocity is 50 m/s. Calculate the rate of heat transfer between the turbine and surroundings, in kW.
If the head loss in 30 m (100 ft) of 75 mm (3 in.) pipe is 7.6 m (25 ft) when a certain quantity of water flows therein, what is the total dragging force exerted by the water on this reach of pipe?
It enters this nozzle at 100 psia, 200oF with a velocity of 100 ft/s and exits at 25 psia. Calculate the exit temperature and velocity of the air.
Carbon dioxide is compressed in a reversible, adiabatic process from 15 psia, 70oF to 60 psia using a steady-flow device with a single inlet and single outlet.
Which of the two choices - air with an isentropic efficiency of 90% or helium with an isentropic efficiency of 80% - will produce the most work?
Calculate the entropy change of the two reservoirs and determine if the increase in entropy principle has been satisfied.
When the given isentropic compression efficiency is 80%, how much work is required and what is the final helium temperature?
Refrigerant 22 enters the compressor of an ideal vapor compression refrigeration system as saturated vapor at 2408C with a volumetric flow rate of 15 m3/min.
During a solar eclipse, the Moon, Earth, and Sun all lie on the same line, with the Moon between the Earth and the Sun. What force is exerted by the Sun on the Moon?
The displacement vectors 46.0 cm at 15.0° and 23.0 cm at 56.0° both start from the origin and form two sides of a parallelogram. Find the length of its longer diagonal.
Find the cooling achieved and the work by the compressor. Is the compressor isentropic? IF the cooling is 300 KJ/kg and the work by the compressor is 300 kJ/kg what is the coefficient of performance
In a refrigerator cycle low saturated liquid enters an evaporator and exits as saturated vapor. Draw the T vs. S curve for this cycle and shade the area that represents the cooling delivered by the re
Water is converted in a boiler from saturated liquid at 500 kPa to superheated steam at 500 kPa and 300*c. Find the change in entropy and the heat transfer required.
Find the exit temperature to the nearest 10*c. What is the work for this condition? What is the isentropic efficiency for the "actual" operation?