Scalar & Vector: Differences & Direction

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SUMMARY

The discussion clarifies the fundamental differences between scalar and vector quantities. Scalars, such as temperature, are defined solely by their magnitude and do not possess direction, as illustrated by the example of +10°C and -10°C. In contrast, vector quantities include both magnitude and direction, which is essential for understanding their application in physics and engineering. The conversation emphasizes the importance of definitions in distinguishing these two types of quantities.

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harshinig
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what are the differences between scalar and vector quantities?
why do we use */-in specifying direction of any scalar quantity
 
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You should find the answer to this by looking up the definitions of scalar and vector.
The second sentence doesn't make any sense to me. You will see what I mean when you read those definitions!
 
I think that the second sentence may be refer to scalar quantities such as temperature, where you can have +10'C but also -10'C.

In a case like this, the signs don't declare the "direction" of the temperature - just its value on a scale with reference to an agreed zero point.
 

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