Part E How much potential energy does the roller coaster have at the top of the second hill? Use your answers from parts C and
D to determine the answer.

b.a device that inputs heat into a cool object

the answer is false. this is because for ice to melt, it requires latent heat of melting. latent heat means heat energy required to change phase without any increase in temperatures. therefore, the ice will take energy from the environment to melt hence atmospheric temperatures will reduce.