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A body of mass 100 kg is suspended by a spring of stiffness of 30 Kn/m and dashpot of damping constant 1000 N s/m. Vibration is excited by a harmonic force of amplitude 80 N and a frequency of 3 Hz.
Calculate the amplitude of the displacement for the vibration and the phase angle between the displacement and the excitation force using the graphical method
A Pitot-static probe is used to measure air velocity at a temperature of 22oC and a pressure of 98.5 kPa. The pressure difference is 1.00 inches of water column. (Use rwater = 1000 kg/m3 and g = 9.807 m/s2.) a) Calculate the air speed in m/s. Show al..
For the following pair of polymers, state whether or not it is possible to determine whether one polymer is more likely to crystallize than the other. Linear and syndiotactic polypropylene-Cross linked cis-isoprene
a steel shaft 120 mm in diameter is supported in flexible bearings at its ends. two pulleys each 500 mm in diameter are
Steam is used in the following adiabatic turbine system to generate electricity; 15% of the mass flow from the first turbine is diverted for other use. How much work (in kJ/h) is generated by the first turbine which is 80% efficient?
An inventor claims to have developed a heat pump that produces a 200kW heating effect for a 20 degree Celsius heated zone while using 75 kW of power. The heat pump operates steadily in an environment at 0 degrees Celsius.
A thermocouple behaves approximately as a first-order system. The element is initially at a temperature of 40°C and suddenly subjected to a temperature of 80°C. The thermocouple indicates a temperature 60°C after 3 s. Calculate the rise time for the ..
Acceleration was uniform. If it assumed that the acceleration was uniform where the magnitute of the volocity of an airplane was changed from 120mph to 360mph in 6 seconds.
a cylindrical specimen of aluminum having a diameter of 19 mm and length of 200 mm is deformed elastically in tension
The figure shows a weapon called a battering ram (modern large battering rams are typically mounted on armored vehicles). The ram has weight Wr=2590 lb, center of mass at E, and radius of gyration kE=6.4 ft. Also let the distance between points A a..
how thick does the 4140 steel need to be if it is a cyclander with a diameter of 8.252 inches and is 1.5 inches deep
consider a cylindrical specimen of some hypothetical metal alloy that has a diameter of 8.0 mm 0.31 in.. a tensile
How the lubricants reduce the friction and wear characteristics of the parts in contact?
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