Objects in free-fall
(a) do not experience air resistance
(b) do not experience gravity
(c) are accelerating faster than 9.8 m/s/s
(d) are completely weightless

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.

For each of the following types of reactions, write a general reaction formula in the symbolic form—for example, a + b → ab. single-displacement double-displacement synthesis decomposition

The grooves or folds of the brain are called