Answer: 
Explanation:
The angular diameter
of a spherical object is given by the following formula:

Where:
is the actual diameter
is the distance to the spherical object
Hence:

This is the angular diameter
A. Tolerance. When you have an "Us vs Them" mentality it can never lead to acceptance.
Chemical because when you eat, the food give off a chemical bond
Answer:

Explanation:
When activated, the receptor most likely prompting the production of saliva is the taste receptor. When food enters the mouth, the salivary glands produce the saliva upon the sensation of taste.