What are the standard measurement units for dynamic or absolute viscosity__________________?
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Answer: C. newton-sec per meter
Explanation
Dynamic viscosity has dimensional units of force-time per unit area of fluid layer. These dimensions correspond directly to newton-seconds per meter squared in standard SI units. Educational texts frequently simplify this expression format as newton-sec per meter for brevity. Newton law of viscosity relates shear stress to velocity gradients using dynamic viscosity as the proportionality constant. Absolute viscosity quantifies a fluid's resistance to continuous shearing deformation under mechanical loads. Dimensional analysis confirms that force multiplied by time divided by area yields viscosity units.
Mechanical engineers use absolute viscosity units when designing hydrodynamic journal bearings and lubrication systems. Hydraulic circuit designers calculate pressure drops using viscosity to ensure efficient fluid power transmission. Standardizing viscosity units prevents calculation errors in international engineering research and industrial applications. Option A represents the standard measurement units for kinematic viscosity rather than dynamic viscosity. Option B uses incorrect mass-time-length combinations that fail standard dimensional analysis for viscosity. Option D includes squared time terms which violate the correct fundamental dimensions of absolute viscosity.
- Subject
- Engineering
- Category
- Mechanical Engineering
- Topic
- —
- Difficulty
- medium
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