What role does the esophagus play in the digestion of food? Text to speech
A:A. The esophagus breaks up pieces of food through chemical reactions.
B:B. The esophagus pushes food into the throat.
C:C. The esophagus has muscles that push food into the stomach.
D:D. The esophagus produces digestive juices to break down food.

Acalorimeter is to be calibrated: 51.203 g of water at 55.2 degree c is added to a calorimeter containing 49.783 g of water at 23.5c. after stirring and waiting for the system to equilibrate, the final temperature reached is 37.6 degree c. specific heat capacity of water (s = 4.18 j/g∙degree c). calculate the calorimeter constant. (smδt)warm water = -[(smδt)cold water + (calorimeterδtcold water)]