Consider the table of Prob. 7–5 where the primary dimensions of several variables are listed in the mass– length–time system. Some engineers prefer the force–length–time system (force replaces mass as one of the primary dimensions). Write the primary dimensions of three of these (density, surface tension, and viscosity) in the force–length–time system.

Data from Table 7-5

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TABLE P7-5 Parameter Name Acceleration Angle Density Force Frequency Pressure Surface tension Velocity Viscosity Volume flow rate Parameter Symbol a 0, d, etc. P F f P os V μl V Primary Dimensions L¹t-2 1 (none) m¹L-3 m¹L¹t-2 t-1 m¹L-¹t-2 m¹t-2 L't-1 m¹L-¹t-1 L³t-1