I have a question, it concerns hydrostatic buoyancy and Archimedes' law. If I have a boat in some pool and and the ship would drop anchor. The the water level would theoretically rise or remain the same (and I also need to know why)?

the lvl wud remain the same

Explanation: as per Archimedes Principle, the weight of the water displaced by the object is equal to the weight of the object. When the ship initially went into the pool, it wud hv displaced some water. When the anchor is dropped, the level does not change coz the anchor was already in the ship and no extra weight has been added, so the weight of the anchor has already been accounted for in the first place when the ship was first placed in the pool

c because the action was the roller coaster reaches bottom of hill (action) reaction would be blood tends to drain away from head

hope this !