How many US fluid ounces are in a US gallon?

In cooking, how many teaspoons are in a tablespoon in the U.S. system?

What is the metric unit used to measure force? 

What is the metric prefix for one-billionth? 

What is the SI unit of electrical resistance? 

What is the name of the ancient unit equal to about the length of a forearm, often used in the Bible? 

Which unit is commonly used to measure horse’s height? 

How many feet are in a mile? 

What unit is used to measure gemstone weight? 

 In typography, what unit is traditionally used to measure font size?