what is meant by scalor guantity?
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Explanation:
Scalar Quantities. There are two types of quantities describing fluid flows: scalar and vector quantities. Scalar quantities are quantities that are described only by a magnitude. They do not have a direction of action. For fluids the relevant scalar quantities are
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temperature T , measured in K
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density ρ, measured in kg m− 3
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pressure p, measured in Pa
In the following we will use the symbol ψ whenever referring to a scalar quantity.
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which requires only magnitude not direction
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