Between points 5 and 6, energy is being used to
a. melt ice.
b. heat water.
c. vaporize water.
d. heat water vapor.

Which changes of state do the labels represent? a: b: c:

Aman throws a football straight into the air. as it rises, it slows down. which type of energy is the football gaining?

Automobile fuel efficiency is often measured in miles that the car can be driven per gallon of fuel (mpg). heavier cars tend to have lower fuel efficiencies (lower mpg ratings). which variable (weight or fuel efficiency) is most naturally considered the explanatory (predictor) variable in this context?