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 (HUP-er-zeen) is a potent chemical derived from a particular type of club moss (Huperzia serrata [Thumb] Trev.). Like caffeine and cocaine, huperzine A is a medicinally active, plant-derived chemical that belongs to the class known as alkaloids.It was first isolated in 1948 by Chinese scientists.uperzine A (HUP-er-zeen) is a potent chemical derived from a particular type of club moss (Huperzia serrata [Thumb] Trev.). Like caffeine and cocaine, huperzine A is a medicinally active, plant-derived chemical that belongs to the class known as alkaloids.
More specifically, an alkaloid extract of the moss, known as huperzine A, has impressive effects on conditions involving the brain. Huperzine A appears to work on areas of memory and can possibly benefit those with loss of short term memory; as well as in conditions of long term memory loss, such as Alzheimer's disease.9]. In treatments of dementia, huperzine A supplementation has been shown to improve the memory, behavior, and cognitive function in people with Alzheimerâs disease, brain damage caused by strokes, and in the very elderly who suffer from senile-induced dementia.