Kumamoto University researcher's new theoretical model considers the normal component of liquid surface tension in addition to the tangential component. This image may only be used in conjunction with ...

Velocity is always TANGENT to the path. Acceleration, in general, has BOTH tangential and normal components. The normal component of acceleration always points INWARD to the path. The tangential ...

Zhuravleva, I. V., Churazov, Eugene, Sazonov, S. Y., Sunyaev, R. A., Forman, William R., and Dolag, K. 2010. "Polarization of X-ray lines from galaxy clusters and ...

With the polar description, we write the velocity and acceleration vectors for a point in terms of the polar unit vectors e_r and e_theta. Recall that e_r points outward from the observer O and the ...