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A company wishes to enhance its image by replacing oil-based plastics in its products by polymers that are based on natural materials. Use CES EduPack to find information on biopolymers. List the materials you find and state their significant applications. Which materials biopolymers are made from? Describe a plastic product on the market made from a bio-polymer, including which bio-polymer it is made from.
The wire of a hoist has a cross sectional area of 80 mm2. The hoist is used to lift a crate weighing 500 kg. What is the stress in the cable? The free length of the cable is 3 m. How much will it extend if it is made of steel (modulus 200 GPa)? How much will it extend if it is made of polypropylene, PP (modulus 1.2 GPa)? (assume purely elastic deformations).
air at 100 kpa and 27degc enters an isentropic compressor at a rate of 100 ls and leaves at 1000 kpa. determine the
Prepare the statement of financial position
two identical 3 in. major-diamter power screws single-threaded with modified square threads are used to raise and lower
in a steam power plant some steam from the turbine is bled off stream 1 and used in a mixing chamber to heat sub-cooled
an automobile traveling at 90 kmhr rounds a long sweeping curve of radius 250m. the air conditioner is on and the
a rigid vessel contains saturated water mixture at 1 atm. find the liquid by volume such that the water will pass
suppose that the mass in a mass-spring-dashpot system with m10 c9 and k2 is set in motion with x00 and x05 a find the
air is compressed in an isentropic process from an initial pressure and temperature of p 1 90 kpa and t1 22 oc to a
a cylinder fitted with a piston has an initial volume of 2 ft3 and contains nitrogen at 20 lbfin2 at 80 f degrees. the
the automobile shown has 1200kg mass with center of gravity at point g and all wheel have the same 0.34m radius if the
two machines are used for filling glass bottles with a soft-drink beverage. the filling process have known standard
refrigerant r-134a with a mass of 0.08 kg is expanded adiabatically from a superheated vapor at 10 bar 40 c to a
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