The wheels of a car are able to spin due to the combustion of gasoline inside the car's engine. what type of energy transfer best explains this process?
a. mechanical energy is converted to light energy.
b. mechanical energy is converted to heat energy.
c. chemical energy is converted to mechanical energy.
d. light energy is converted to electromagnetic energy.

An experiment is conducted to see if cats preferred skim milk or 2% milk. a cup of skim milkwas put out for 5 kittens and then measured how much the kittens drank over the course of aday. following a cup of 2% milk was purout for the skittens and then masured how much thekittens drank over the course of a day. the same kittens were used and the milk was served atthe same temperature. it was discovered that the cats liked the 2% milk more than the skimmilk. what is the dependent variable in this experiment?