18. *** Las magnitudes de los cuatro vectores de desplazamiento que se muestran en la figura son A -16.0 m. B-11.0 m, C -12.0 m y D- 26.0 m. a) Determine la magnitud, y b) el ángulo
direccional de la resultante que ocurre cuando estos vectores se suman.

Aknife blade is a(n) a. lever b. screw c. wedge d. inclined plane

30 points - when can a theory be modified if a new type of technology allows for new observations that raise new questions? a. immediately, while the questions about the theory are being asked b. after new hypotheses related to the theory are tested in experiments c. only after the new observations disprove all parts of the theory d. while scientists begin to think about how the theory could improve

Determine the age of a fossil if it had only one eighth of its original carbon-14 content remaining?