Give an introduction to Hydrographic Surveying/Hydrography and specifically, the chosen field of competence associated with it which is scientific studies.

Assume a string with length L which is fixed at left side, and the mass, m, and the spring with stiffness k are attached to the string on the right side. f(x.t) is force per unit length. 州性个M a) Find governing equations and boundary conditions. b) Find characteristic equation of the spring in order to find natural frequencies.

The establishment of a network of reference bench marks is the main objective of       a. primary control surveys b. vertical control surveys c. horizontal control surveys d. auxiliary control surveys

surveying slope step by step calculate the slope only HANDWRITTEN answer needed ( NOT TYPED)

Name the types of geophysical investigation methods.