wooden boards that maintains their surface temperature at 70 °C. The boards are stacked outside and in the winter time they can be considered to be at 0 °C when they are brought in for heating. The thermal diffusivity of the wood is 9*108 m²/s. a. Calculate the time from the start of heating for a 2.5 cm thick board to reach a sterilization temperature of 56 °C at its slowest heating point. b. Calculate the heating time when four such boards are stacked together. c. Calculate the ratio of the two heating times (for a single board versus when they are stacked), and explain the ratio. Note: You're free to make assumptions regarding any value you think you need in order to solve the problem. Just explain your reasoning behind your assumption in a logical manner. Don't use Heissler charts to answer this question.

wooden boards that maintains their surface temperature at 70 °C. The boards are stacked outside and in the winter time they can be considered to be at 0 °C when they are brought in for heating. The thermal diffusivity of the wood is 9*108 m²/s. a. Calculate the time from the start of heating for a 2.5 cm thick board to reach a sterilization temperature of 56 °C at its slowest heating point. b. Calculate the heating time when four such boards are stacked together. c. Calculate the ratio of the two heating times (for a single board versus when they are stacked), and explain the ratio. Note: You're free to make assumptions regarding any value you think you need in order to solve the problem. Just explain your reasoning behind your assumption in a logical manner. Don't use Heissler charts to answer this question.

University Physics Volume 2

18th Edition

ISBN:9781938168161

Author:OpenStax

Publisher:OpenStax

Chapter1: Temperature And Heat

Section: Chapter Questions

Problem 61P: Calorimetry On a hot day, the temperature of an 80,000-L swimming pool increases by 1.50 . What is...

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