When food is physically changed, mechanical digestion occurs. Food is broken into smaller parts and mixes continually with enzymes and other gastric juices. Mechanical digestion occurs in the mouth, stomach, and small intestine. Food is chemically changed in digestion when new, smaller substances are formed.
Answer:
It depends on the identity of the outer atom
Explanation:
We must recall that the polarity of a molecule depends on difference In electronegativity between atoms as well as the shape of the molecule.
When a central atom has no lone pairs and all the groups in the molecule are bonding, the identity and arrangement of the outer atoms will determine the polarity of the molecule.
A polar molecule is formed by certain types of outer atoms arranged in certain ways around the periodic table and vice versa.
Answer:
D. Tetrahedral is the best description of methane's shape.
Explanation:
In that position hydrogen atoms are as far from one another as they can get. It is that way because hydrogen atoms repels each other.
Verbal and nonverbal.
They would look for shakiness of the voice (verbal) or darting eyes (nonverbal), and other things to that same effect.
