(Q).
Answer the following question given this paragraph: In physics, a quantity, such as mass, length, or speed that is completely specified by its magnitude and has no direction is called a scalar . A vector , on the other hand, is a quantity possessing both magnitude and direction. A vector quantity is typically represented by an arrow-tipped line segment. The length of the line, drawn to scale, represents the magnitude of the quantity. The direction of the arrow indicates the direction of the vector. Not only can vectors be represented graphically, but they can also be added graphically. Q: What do vectors possess that scalars do not? Choices: - height and polarity - direction and texture - magnitude and weight - magnitude and direction A:
(A).
magnitude and direction

(Q).
Answer the following question given this paragraph: Enzymes are involved in most of the chemical reactions that take place in organisms. Q: What substances, which serve as catalysts, are involved in most of the chemical reactions that take place in organisms? Choices: - proteins - vitamins - carbohydrates - enzymes A:
(A).
enzymes

(Q).
Answer the following question given this paragraph: Objects have the same velocity only if they are moving at the same speed and in the same direction. Objects moving at different speeds, in different directions, or both have different velocities. Q: Objects moving at different speeds, in different directions have different what? Choices: - protons - vibrations - electrons - velocities A:
(A).
velocities