 
			 
			MCQOPTIONS
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				| 1. | Which of these is an acceptable tag for Lagrangian parcels? | 
| A. | Parcel’s centre of mass at instantaneous time | 
| B. | Parcel’s centre of pressure at instantaneous time | 
| C. | Parcel’s centre of mass at initial time | 
| D. | Parcel’s centre of pressure at initial time | 
| Answer» D. Parcel’s centre of pressure at initial time | |