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The roof over a 9.0-m x 10.0-m room in a school has a total mass of 12900 kg. The roof is to be supported by vertical wooden "2 x 4s" (actually about 4.0 cm x 9.0 cm) equally spaced along the 10.0-m sides. Consider only compression, and assume a safety factor of 14. The compressive strength for the wood is 3.5 x 107 N/m2. Part A How many supports are required on each side? Express your answer as an integer. ? N = supports on each side Submit Previous Answers Request Answer X Incorrect; Try Again; 5 attempts remaining Part B How far apart must they be? Express your answer to two significant figures and include the appropriate units. HÁ d = Value m Submit Previous Answers Request Answer

The roof over a 9.0-m x 10.0-m room in a school has a total mass of 12900 kg. The roof is to be supported by vertical wooden "2 x 4s" (actually about 4.0 cm x 9.0 cm) equally spaced along the 10.0-m sides. Consider only compression, and assume a safety factor of 14. The compressive strength for the wood is 3.5 x 107 N/m2. Part A How many supports are required on each side? Express your answer as an integer. ? N = supports on each side Submit Previous Answers Request Answer X Incorrect; Try Again; 5 attempts remaining Part B How far apart must they be? Express your answer to two significant figures and include the appropriate units. HÁ d = Value m Submit Previous Answers Request Answer

Elements Of Electromagnetics
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
Problem 1.1MA
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Constants The roof over a 9.0-m × 10.0-m room in a school has a total mass of 12900 kg. The roof is to be supported by vertical wooden "2 x 4s" (actually about 4.0 cm x 9.0 cm) equally spaced along the 10.0-m sides. Consider only compression, and assume a safety factor of 14. The compressive strength for the wood is 3.5 x 107 N/m2. Part A How many supports are required on each side? Express your answer as an integer. ? N = supports on each side Submit Previous Answers Request Answer X Incorrect; Try Again; 5 attempts remaining Part B How far apart must they be? Express your answer to two significant figures and include the appropriate units. HÁ ? d = Value m Submit Previous Answers Request Answer X Incorrect; Try Again; 5 attempts remaining
Transcribed Image Text:Constants The roof over a 9.0-m × 10.0-m room in a school has a total mass of 12900 kg. The roof is to be supported by vertical wooden "2 x 4s" (actually about 4.0 cm x 9.0 cm) equally spaced along the 10.0-m sides. Consider only compression, and assume a safety factor of 14. The compressive strength for the wood is 3.5 x 107 N/m2. Part A How many supports are required on each side? Express your answer as an integer. ? N = supports on each side Submit Previous Answers Request Answer X Incorrect; Try Again; 5 attempts remaining Part B How far apart must they be? Express your answer to two significant figures and include the appropriate units. HÁ ? d = Value m Submit Previous Answers Request Answer X Incorrect; Try Again; 5 attempts remaining
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