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Problem 1: Determine the damping ratio if the peak to peak amplitude of an accelerometer attached to a vibrating beam goes from 5V to 3V after 6 cycles of oscillation.
Problem 2: A 1/8 in. thick aluminum bar 1 in. wide is mounted in a cantilevered condition, as we done in lab. If a 3 lb weight is hung 15 inches from the mount and a strain gauge is place 2 in. from the mount on the top of the beam, what strain is expected to be observed?
(Aluminum 6061-T6 E = 10,000 ksi, v = 0.33)
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The diameter of the sun is 1.39 x 106 km and is assumed to radiate with emissivity, e = 0.98, estimate its effective temperature. The distance between the sun and earth is about 1.495 x 108 km. The earth temperature is about 15 C. The solar constant ..
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A pin-connected structure consists of a rigid beam ABCD and two supporting bars. Bar (1) is an aluminum alloy [E = 70 GPa] with a cross-sectional area of A1 = 2,400 mm2. Bar (2) is a bronze alloy [E = 100 GPa] with a cross-sectional area of A2 = 6,00..
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