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Review:

1. A ____ quantity is completely described by magnitude alone. A ____ quantity Is completely described by a magnitude with a direction.

a. scalar, vector

b. vector, scalar

2. Speed is a ____ quantity and
velocity is a ____ quantity.

a. scalar, vector

b. vector, scalar

User Calvin Hu
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2 Answers

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Final answer:

A scalar quantity is defined by magnitude and a vector quantity by magnitude and direction. Time is an example of a scalar, and displacement is a vector. Speed is a scalar, while velocity is a vector that includes direction, such as a car moving east at 100 km/h.

Step-by-step explanation:

The answer to the first review question is a. scalar, vector. A scalar quantity is fully described by its magnitude, while a vector requires both magnitude and direction to be fully described. An example of a scalar quantity would be time, and an example of a vector quantity would be displacement.

For the second review question, the answer is a. scalar, vector. Speed is a scalar quantity which means it is described completely by magnitude alone and velocity is a vector quantity, implying that it is described by both magnitude and direction. For instance, a car traveling east along a highway at 100 km/h is described by the velocity vector which includes both the speed (100 km/h) and the direction (east).

User AlonS
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2 votes

Answer:

1. 1. A quantity is completely described by magnitude alone. A quantity Is completely described by a magnitude with a direction.

[a]. scalar, vector

b. vector, scalar

2.2. Speed is a velocity is a quantity and quantity.

a. scalar, vector

[b]. vector, scalar

User KellCOMnet
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3.2k points