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A thermo pane window consists of two glass panes, each 0.50 centimeter thick, with a 1 centimeter thick sealed layer of air in between. (Use 0.8 J/s•m•°C for the thermal conductivity of glass and 0.0234 J/s•m•°C for the thermal conductivity of air to answer the following.)
(a) If the inside surface temperature is 23.2°C and the outside surface temperature is 0.0°C, obtain the rate of energy transfer through 1.95 m2 of the window.
____________W
(b) Compare your answer to (a) with the rate of energy transfer through 1.95 m2 of a single 1.0-cm-thick pane of glass. Disregard surface air layers.
A simple pendulum consists of a ball of mass M = 4.5 kg hanging from a uniform string of mass m = 0.6 g and unknown length L. The pendulum is located in gravitational field g = 9.8 m/s2 and has period T = 2 s. For simplicity, ignore the string’s weig..
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