A wooden sphere of diameter 5 cm is initially at a uniform temperature of 21 °C. Its surfacetemperature is suddenly raised to 83 °C. The thermal conductivity and thermal diffusivity ofthe wood are 0.15 W/m K and 0.82 x 10-7 m2/s, respectively.a) Calculate the temperature 2 cm beneath the surface of the sphere 30 min after thesudden increase in temperature.b) Calculate the energy gained by the sphere during this time.
A wooden sphere of diameter 5 cm is initially at a uniform temperature of 21 °C. Its surfacetemperature is suddenly raised to 83 °C. The thermal conductivity and thermal diffusivity ofthe wood are 0.15 W/m K and 0.82 x 10-7 m2/s, respectively.a) Calculate the temperature 2 cm beneath the surface of the sphere 30 min after thesudden increase in temperature.b) Calculate the energy gained by the sphere during this time.
College Physics
10th Edition
ISBN:9781285737027
Author:Raymond A. Serway, Chris Vuille
Publisher:Raymond A. Serway, Chris Vuille
Chapter11: Energy In Thermal Processes
Section: Chapter Questions
Problem 15P: What mass of water at 25.0C must be allowed to conic to thermal equilibrium with a 1.85-kg cube of...
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Question
A wooden sphere of diameter 5 cm is initially at a uniform temperature of 21 °C. Its surface
temperature is suddenly raised to 83 °C. The thermal
the wood are 0.15 W/m K and 0.82 x 10-7 m2
/s, respectively.
a) Calculate the temperature 2 cm beneath the surface of the sphere 30 min after the
sudden increase in temperature.
b) Calculate the energy gained by the sphere during this time.
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