In SI units, the specific weight of water is equal to ________________?
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Answer: C. 9.81 xlO3 N/m3
Explanation
The specific weight of a fluid is calculated by multiplying its mass density by gravitational acceleration. For water, the standard density is approximately one thousand kilograms per cubic meter. Multiplying one thousand by the standard gravitational acceleration yields nine point eight one times ten cubed. Specific weight represents the gravitational force exerted on a unit volume of any given substance. The International System of Units measures specific weight in newtons per cubic meter. The standard value for gravitational acceleration near Earth surface is nine point eight one meters per second squared.
Option A lacks the gravitational acceleration multiplier required to convert mass density into a volumetric force. Option B uses an incorrect order of magnitude for standard SI gravitational calculations involving water density. Option D places the exponent at the sixth power, which overestimates the value by a factor of one thousand.
- Subject
- Engineering
- Category
- Mechanical Engineering
- Topic
- —
- Difficulty
- medium
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