What are the standard engineering units for Young’s modulus__________________?
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Answer: D. kg/cm2
Explanation
Young's modulus has the dimensions of stress, which is expressed in standard metric engineering units as kg/cm2. Because strain is dimensionless, the units of Young's modulus match the units of tensile stress exactly. Older engineering reference books frequently use kilogram-force per square centimeter for structural calculations. Young's modulus quantifies material stiffness by dividing stress by strain within the elastic deformation zone. Modern SI units express Young's modulus in Pascals or Newtons per square meter, while imperial units use psi. Unit conversion between metric engineering systems and international standards is essential for global manufacturing.
Civil engineers consult material data tables listing Young's modulus in standard engineering units for beam calculations. Using consistent unit systems prevents catastrophic calculation errors in bridge and building structural designs. Mechanical specifications require clearly stated units for all material property parameters to ensure fabrication accuracy. Millimeters per millimeter measures dimensionless strain rather than stress or Young's modulus. Kilograms per centimeter represents linear force density rather than stress or pressure units. Kilograms measures mass or force directly, whereas Young's modulus requires a distributed pressure unit.
- Subject
- Engineering
- Category
- Mechanical Engineering
- Topic
- —
- Difficulty
- medium
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