"consider the following systems: i) water behind a dam. ii) a swinging pendulum. iii) an apple on an apple tree. iv) the space shuttle in orbit. in which of the systems is potential energy present? "a. i and ii b. i, ii and iii. c. ii, iii and iv. d. ii and iv .e. i, iii and iv.

Which lists the fundamental forces in order, from strongest to weakest? strong nuclear, weak nuclear, electromagnetic, gravitational strong nuclear, electromagnetic, weak nuclear, gravitational gravitational, weak nuclear, electromagnetic, strong nuclear electromagnetic, gravitational, strong nuclear, weak nuclear