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A continuous and aligned glass fiber reinforced composite consists of 40 volume% of glass fibers (modulus of elasticity = 69 GPa) and 60 volume% of a polyester resin that, when hardened displays a modulus of 3.4 GPa. What is the modulus of elasticity of this composite in the longitudinal direction?
A nozzle is designed to linearly accelerate the fluid from V1 to V2 (i.e., V = ax +b, where a and b are constants). The flow at t = 0 is
The photograph shows two U.S. Coast Guard icebreakers in an ice field, and a simple model for an ice breaking operation. If the coefficients of static and kinetic friction
What are the micro structural changes that occur in a metal during strain-hardening and annealing? In these processes, how are the yield strength and ductility affected?
Two new rides are being compared by a local amusement park in terms of their annual operating costs. The two rides are assumed to be able to generate the same level of revenue (and thus the focus on costs).
During a regeneration process, some steam is extracted from the turbine and is used to heat the liquid water leaving the pump. This does not seem like a smart thing to do since the extracted steam could produce
Due to atmosphere drag, the deceleration equation is 60a=588.6-30v^2 in m/s^2. Find the velocity at which he lands on the ground. This velocity is referred to as terminal velocity, which is found by letting the distance of the fall (y) go to infin..
What would the height of a water tower with a 500 gallon tank have to be, to bring water ( by gravity ) from sealevel over a distance of 2.5miles with an elevation of 300ft?
A soil borrow material in its natural state in the ground has a unit weight of 86 pcf. Its natural water content is 9%. What is the dry weight of this material
An 8-inch water main with a flow rate of 14 ft3/sec raises 100-feet. At the beginning of the main the pressure is 110 psig and drops to 50-psig at the end. The calculated Hl = 11.7 m.
A machine is supported on four steel springs for which damping can be neglected. The natural frequency of vertical vibration of the machine-spring system is 200 cycles per minute. The machine generates a vertical force p(t)=p0sinwt.
A large rock became visible to a driver at a distance of 175 ft. Assuming a perception-reaction time of 0.8s, an initial speed of 42 mph, a coefficient of friction equal to 0.5, and a level roadway, calculate the speed at impact.
An open rectangular tanks is 3m wide and 4m long. The tank contains water to depth of 2m and oil (SG=0.8) on top of the water to a depth of 1m. Determine the magnitude and location of the resultant force acting on one end of the tank (i.e. 3m high by..
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