A submarine rests on the sea bottom. The normal force exerted upon the sub by the sea-floor is equal toA) the weight of the sub less the weight of the displaced water. B) the weight of the displaced water. C) the weight of the sub plus the weight of the displaced water. D) the buoyant force less 1 atmosphere acting on the sub. E) the weight of the sub.

Which of the following situations is impossible? a) an object has velocity directed east and acceleration directed east. b) an object has zero velocity but non-zero acceleration. c) an object has constant non-zero velocity and changing acceleration. d) an object has velocity directed east and acceleration directed west. e) an object has constant non-zero acceleration and changing velocity.

The total amount of energy contained in an object

Which of these statements best explains how the hydrosphere interacts with the atmosphere to affect global climate? mountains block rain clouds and cause changes in global rainfall and evaporation. humans burn fossil fuels to produce greenhouse gases which cause global warming. humans cut down trees which affects the amount of oxygen in different parts of the globe. greenhouse gases, like carbon dioxide, dissolve in oceans and prevent global warming.