"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.

What should the power status of a circuit be when measuring resistance with an ohmmeter?

Which safety measures should you follow during a thunderstorm? check all that apply. (a) avoid touching anything that conducts electricity. (b) avoid touching a person who has been struck by lightning. (c) go outside. (d) keep your computer turned off. (e) stay out of water. (f) stay inside.

Which statements describe the movement of ocean currents around the globe? check all that apply. strong winds force warm water to sink to the ocean floor. the coriolis effect causes warm and cold water to mix. cool dense water sinks to the ocean floor. warm water replaces cool surface water. wind blowing parallel to the shore causes upwelling of cool water.