HEL The charge of each iron ion in the ionic compound FeS is Fe2+.

Please select the best answer from the choices provided

T
F

Idon’t quite understand this problem

Two steel balls, each of mass m, are welded to a light rod of length l and negligible mass and are initially at rest on a smooth horizontal surface. a horizontal force of magnitude f is suddenly applied to the rod as shown. determine (a) the instantaneous acceleration a of the mass center g and (b) the corresponding rate at which the angular velocity of the assembly about g is changing with time.

The frequency of the fundamental of the guitar string is 320 hz. at what speed v do waves move along that string?