Let u and v be vectors and consider the parallelogram that the two vectors make. Note: For i x j the magnitude is 1 and the direction is k, hence i x j = k. A 20 inch wrench is at an angle of 30 degrees with the ground. A force of 40 pounds that makes and angle of 45 degrees with the wrench turns the wrench. Find the torque.
Huperzine A is a substance purified from a plant called Chinese club moss. Although the makers of huperzine A start with a plant, their product is the result of a lot of laboratory manipulation.hildren: Huperzine A is POSSIBLY SAFE in children when taken by mouth for a short period of time (less than one month). Pregnancy and breast-feeding: There is not enough reliable information about the safety of taking huperzine A if you are pregnant or breast-feeding.
1 Dementia. 2  Some research suggests that taking huperzine A by mouth for up to 8 weeks may improve memory, mental function, and behavior in people with conditions such as Alzheimer's disease or dementia. 3  The long-term effects of huperizine A in people with these conditions is not yet known.hildren: Huperzine A is POSSIBLY SAFE in children when taken by mouth for a short period of time (less than one month). Pregnancy and breast-feeding: There is not enough reliable information about the safety of taking huperzine A if you are pregnant or breast-feeding. Stay on the safe side and avoid use.