Dating of rock layers which layer is the youngest f, A,s, h,b, d,c, e

This active feature of earth's crust in building mountain ranges as well as islands. this feature is a a) cavern. b) earthquake. c) mountain. d) volcano.

Joe shines white light into a bowl half full of water at an angle of incident of 27.5°. calculate the angle of refraction in the water given the indices of refraction for air and water are 1.00 and 1.36, respectively.

Which element has the lowest electronegativity? calcium(ca) gallium(ga) selenium(se) bromine(br)