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For each question, provide an explanation, identifying the correct choice ( it is marked in red)  and explaining why it's the right answer, as well as why the other options are incorrect.  Please do 1, 2.

For each question, provide an explanation, identifying the correct choice ( it is marked in red)  and explaining why it's the right answer, as well as why the other options are incorrect.  Please do 1, 2.

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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For each question, provide an explanation, identifying the correct choice ( it is marked in red)  and explaining why it's the right answer, as well as why the other options are incorrect. 

Please do 1, 2. 

1. During aging of an Aluminum alloy at 300°C, maximum hardness is achieved after 5hr of aging. To achieve a higher hardness for the same alloy what combination of aging time and temperature would you choose? a. Temp < 300°C, time > 5hr b. Temp < 300°C, time < 5hr c. Temp > 300°C, time > 5hr d. Temp > 300°C, time < 5hr 2. Mechanical properties of an alloy with melting temperature of 900°C are calculated through tensile testing at two temperatures and strain rates. Which of the following combinations leads to the highest yield strength: a. Temperature = 25°C, Strain rate = 1s-1 b. Temperature = 500°C, Strain rate = = 1s-1 c. Temperature = 25°C, Strain rate = 0.1s-1 d. Temperature = 500°C, Strain rate = 0.1s-1 I
Transcribed Image Text:1. During aging of an Aluminum alloy at 300°C, maximum hardness is achieved after 5hr of aging. To achieve a higher hardness for the same alloy what combination of aging time and temperature would you choose? a. Temp < 300°C, time > 5hr b. Temp < 300°C, time < 5hr c. Temp > 300°C, time > 5hr d. Temp > 300°C, time < 5hr 2. Mechanical properties of an alloy with melting temperature of 900°C are calculated through tensile testing at two temperatures and strain rates. Which of the following combinations leads to the highest yield strength: a. Temperature = 25°C, Strain rate = 1s-1 b. Temperature = 500°C, Strain rate = = 1s-1 c. Temperature = 25°C, Strain rate = 0.1s-1 d. Temperature = 500°C, Strain rate = 0.1s-1 I
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