What is the diffrence between dimension and unit?
Answers
Answer:
There is a difference between dimensions and units. A dimension is a measure of a physical variable (without numerical values), while a unit is a way to assign a number or measurement to that dimension. For example, length is a dimension, but it is measured in units of feet (ft) or meters (m).
Answer:
There is a difference between dimensions and units. A dimension is a measure of a physical variable (without numerical values), while a unit is a way to assign a number or measurement to that dimension. For example, length is a dimension, but it is measured in units of feet (ft) or meters (m).
Explanation:
The ``dimensions'' of a quantity refer to the basic nature of the quantity, i.e. how the quantity is related to length, mass, time, charge. Dimensions are a more abstract, general kind of thing than units; ``units'' refer to specific ways of reporting a quantity. A particular quantity can be reported in many different kinds of units, but it will always have the same dimensions. For example, force (which can be expressed ) has dimensions of . Force can be expressed in different units: Newtons, ergs, or pounds-cm per square hour.
Checking the dimensions your answers is a very, very useful habit to get into: if they don't come out to what you expect, you know you've made a mistake somewhere.