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A mass-spring-damper system has a mass of 100 kg. Its free response amplitude decays such that the amplitude of the 30th cycle is 20% of the amplitude of the 1st cycle. It takes 60 s to complete 30 cycles. Estimate the damping constant c and the spring constant k.
Derive at least four concept designs to satisfy the given specification - draw a central cross-section of the heat exchanger
a full-revolution press has 100 rpm flywheel rotation. the press is equipped with two-hand palm buttons mounted on the
compressed liquid water at 42 c and 8 mpa steadily flows into a boiler and exits as a saturated vapor at 8 mpa. the
a flat-plate collector 4m2 in area is tested during the night to measure the overall heat loss coefficient. water at
a frictionless piston-cylinder is filled with 3 liters of water at 250 kpa. initially the temperature of the water is
Compare the time and cost of using the following three alternative methods for casting the concrete for the wall: 1) direct chute 2) pumped 3) crane and bucket.
a thermocouple is placed in an exhaust pipe in a diesel engine. thermocouple is reading 500oc while the exhaust pipe is
Consider the 2.0micrometer long GaAs device where the E-field is 5kV/cm and Mn*=.067M0. Calculate the transit time of an electron through the device if the mobility is 8000 cm^2V-s.
three equal positive point charges of magnitude q 2.00micro c are located at three corners of a square of edge length
showing the two upward pulls of the rings on his hands, each of size 380N. Calculate the angle between the wires supporting the rings and the vertical.
A piston-cylinder device contains 0.005 m3 of liquid water and 0.9 m3 of water vapor in equilibrium at 600 kPa. Heat is transferred at constant pressure until the temperature reaches 200°C.
Determine the temperature of the electric heater element and drawing of the temperature profile.
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