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1. Explain briefly how the volume of fiber, fiber orientation, and fiber strength and modulus affect the properties of fiber-reinforced composites.
2. Five kg of continuous boron fibers are introduced in a unidirectional orientation into 8 kg of an aluminum matrix. Calculate
(a) the density of the composite,
(b) the modulus of elasticity parallel to the fibers, and
(c) the modulus of elasticity perpendicular to the fibers.
Determine at t = 3 seconds: (a) the magnitudes of velocity and acceleration vectors, and (b) the angles which these vectors make with the x-axis.
a square bar is made from 6061-t4 aluminum alloy. at 75 degrees f its length is 10.500 in. it is placed between rigid
Determine the speed of the 50 kg cylinder after it has descended a distance of 2 m starting from rest. Gear A has a mass of 10 kg and a radius of gyration of 125 mm about its center of mass
steam enters a turbine at 9 mpa and 500 celcius with a velocity of 50 ms and leaves at 20 kpa with a quality of 90
Define: (i) specific heat capacity (ii) molar heat capacity. (b) Distinguish between: (i) heat capacity at constant volume and constant pressure
air enters an adiabatic nozzle steadily at 300 kpa 200degcand 28 ms and leaves at 100 kpa and 168 ms. the inlet area of
1. Each of the following exercises requires evaluating the quality of a two-phase liquid-vapor mixture: (a) The quality of a two-phase liquid-vapor mixture of H2O at 40°C with a specific volume of 10 m3/kg is
calculate the area required for a shell-and-tube heat exchanger with the steam making one shell pass and the water making two tube passes. The overall heat-transfer coefficient is 3000 W/m2 ·K.
to determine the specific volume v and specific internal energy u for some solids and liquids is it more important that
Usually each of the three principal parties (the owner, designer, and contractor) prepares a cost estimate at different times during the life of a project. Describe the purpose of each estimate and the impact that estimating errors may have on the..
a sky diver with a mass of 70 kg jumps from an aircraft. the aerodynamic drag force acting on the sky diver is known to
a storage tank holds 75 cubic meters of a gas at 28deg c and a pressure of 130kpa. the gas appears to have a molecular
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