Answer:

Explanation:
Momentum is defined as mass in motion and it can be calculated by getting the product of mass and velocity.
P = mv
where:
P = Momentum
m = mass
v = velocity



So the answer is 
Answer:
There are 20 amino acids, but only ten are essential.
Explanation:
Answer:
The correct answer is - true.
Explanation:
Aspects of body language such as facial expressions, gestures are important non verbal communication tools that help in detecting the emotion of an individual. Verbal communication tools are also important to detect emotions, however, Body language is more essential than verbal communication tools.
Facial expressions are helpful to recognize if an individual is happy, sad, that can easily experience on face of of a particular person.
Thus, the correct answer is - true.