We would like to produce a lightweight epoxy part to provide thermal insulation. We have available hollow glass beads for which the outside diameter is 1/16 in. and the wall thickness is 0.001 in. Determine the weight of beads that must be added to the epoxy to produce a one-pound composite with a density of 0.65 g/cm3 . The density of the glass is 2.5 g/cm3 and that of the epoxy is 1.25 g/cm3 .
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Amachinist turns the power on to a grinding wheel, at rest, at time t = 0 s. the wheel accelerates uniformly for 10 s and reaches the operating angular velocity of 96 rad/s. the wheel is run at that angular velocity for 40 s and then power is shut off. the wheel slows down uniformly at 1.5 rad/s2 until the wheel stops. in this situation, the time interval of deceleration is closest to:
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We would like to produce a lightweight epoxy part to provide thermal insulation. We have available h...
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