Engineering, 19.11.2019 07:31 Arealbot
Stresses exerted by brain tumors on neighboring normal brain tissue can cause serious complications. to estimate these stresses, consider a simple model for a growing brain tumor. bars constrained between the rigid sides of the skull represent the tumor (elastic modulus e1) and the brain (elastic modulus e2). at time t = 0, the lengths of the tumor and brain are l1 and l2, respectively, and the bars have equal cross-sectional areas a. l1 skull tumor brain skull l2 (a) suppose tumor growth is represented by a thermal strain t . in terms of t , compute the stress in the brain due to the growing tumor. (b) for a given t , what is the length of the tumor? (c) assume t = a(1 − exp(− where t is time and a and b are constants, and consider the following parameter values:
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Engineering, 03.07.2019 15:10
If you were designing a bumper for a car, would you prefer it to exhibit elastic or plastic deformation? why? consider the functions of a bumper in both a minor "fender-bender" and a major collision.
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Engineering, 04.07.2019 18:10
Fluids at rest possess no flow energy. a)- true b)- false
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Engineering, 04.07.2019 19:10
Ahelical coil spring has a mean diameter of 50 mm, a wire diameter of 5.5 mm and is wound with a pitch of 10 mm. the spring steel has an ultimate strength of 1250 mpa. find the force needed to compress the spring solid and the wire stress in this condition. state whether the spring will return to its initial length.
Answers: 1
Engineering, 06.07.2019 02:30
Define thermoplastic polymers and thermosetting polymers in terms of their structures, and (ii) describe briefly a process suitable for the production of products from each type of polymer.
Answers: 3
Stresses exerted by brain tumors on neighboring normal brain tissue can cause serious complications....
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