When a firefighter slides down a pole his mechanical energy is transformed into thermal energy because of

ur answer should be c

d, water vapor. gaseous state would have more kinetic energy, they are moving faster. if you have to compare the same state, then higher temperature would have the higher kinetic energy. but if you have solid and liquid at the same temperature - then liquid would have more.

the answer is elliptical orbits. here is are my reason for thinking it is what i know it is. all planets move in elliptical orbits, with the sun at one focus. this is one of kepler's laws. the elliptical shape of the orbit is a result of the inverse square force of gravity. the eccentricity of the ellipse is greatly exaggerated here.