Find the potential energy of a 2kg ball 15m in the air

Asun-sized star will spend most of its lifetime as a: white dwarf red giant protostar main-sequence star

Students design a model roller-coaster track. they place a rubber ball at the highest point on the track and let it go. the ball rolls along the track pulled only by the force of gravity. eventually, it comes to a stop. which change to the design will result in the ball moving the greatest distance?

Mark creates a graphic organizer to review his notes aboutelectrical force.which labels belong in the regions marked x and y?