Scalar & Vector: Differences & Direction

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Scalar quantities are defined by their magnitude alone, such as temperature or mass, while vector quantities include both magnitude and direction, like velocity or force. The discussion highlights confusion around the use of positive and negative signs in scalar quantities, emphasizing that these signs indicate value relative to a reference point rather than direction. For example, a temperature of +10°C and -10°C represents values on a scale without implying directional movement. Understanding these distinctions is crucial for correctly interpreting physical concepts. Clarity in definitions helps differentiate between how scalars and vectors are utilized in scientific contexts.
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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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