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If a quantity does not have a direction, its a scalar quantity, not a vector quantity.
A variable is assigned to represent an unknown quantity.
It is called a variable.
The relevance of the letters is that they represent either an unknown quantity, or that they can stand for ANY quantity.
This varies in different fields but is usually known as a derivative.
1000 calories
If a quantity does not have a direction, its a scalar quantity, not a vector quantity.
by dividing the quantity of heat of a substance by the mass of that substance
It is 4957.75
An algebraic expression uses a letter to represent an unknown quantity.
The answer is 0.001 kilojoules in a joule 1J = 0.001kJ
A variable is usually assumed to represent an unknown quantity. You don't need to "do" anything special to your variable.
A variable is usually assumed to represent an unknown quantity. You don't need to "do" anything special to your variable.
you gain weight
Yes, a value can represent a quantity or amount.
pressure
they show the magnitude