The dynamic behavior of polymeric composites (e. g. block copolymers and blends) is sometimes explained with the of simple models. consider two such models. both consist of two bars of identical volumes, one a glass polymer, one a rubber at room temperature, glued. in model a the bars are parallel, while in model b they are in series. these models are sinusoidally deformed with constant strain amplitude. sketch the expected dependence of e’, e”, and tanδ for both models with respect to temperature or frequency. your temperature range should include glass transition temperatures of both components

The heater element of a 120 v toaster is a 5.4 m length of nichrome wire, whose diameter is 0.48 mm. the resistivity of nichrome at the operating temperature of the toaster is 1.3 × 10-6 ω·m. the toaster is operated at a voltage of 120 v. (a) what is the power drawn by the toaster? (b) if the cost of electricity is 12 ¢ per kilowatt-hour, and it takes 2 minutes to toast bread, how much does it cost for toasted bread? (c) when the heater element is at room temperature, is the resistivity in the nichrome wire greater than, less than, or equal to it’s resistivity when at operating temperature? explain.