What is the mass density value in kgsecVm4 for water at 0°C_________________?
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Answer: D. 101.9
Explanation
Mass density in gravitational or engineering units is expressed in kilograms force-second squared per meter to the fourth power. This value is derived by dividing the standard mass density of water by the local acceleration due to gravity. Dividing one thousand kilograms per cubic meter by approximately nine point eight one meters per second squared yields one hundred one point nine. Gravitational metric units are frequently used in classical fluid mechanics texts to simplify force and mass conversions. Standard mass density for pure water at four degrees Celsius is exactly one thousand kilograms per cubic meter. Dimensional analysis confirms that dividing mass density by gravitational acceleration produces units of kg-s2/m4.
Option A of one is incorrect and represents a dimensionless relative density rather than gravitational mass density. Option B of one thousand is the standard mass density in SI units, not the gravitational engineering unit value. Options C and E represent arbitrary numbers that do not match the correct division of water density by gravity.
- Subject
- Engineering
- Category
- Mechanical Engineering
- Topic
- —
- Difficulty
- medium
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