How much work is done when a girl applies a force of 80 N to move an object 4 m, and then moves the object 1 m back?

Apossible explanation for a set of facts that can be tested by further investigation is called

Explain vector addition, triangle method and parallelogram method

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.