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| abstraction > mathematical concept > number > quantity > angular momentum | 
| angular momentum comparison table | |||
| Subject | is a kind of | has symbol | has definition | 
|---|---|---|---|
| quantity | number | A number with specific units | |
| angular momentum | quantity | L | The product of mass and angular velocity for an object in rotation; similar to linear momentum. In quantum mechanics, angular momentum is quantized, i.e., is measured in indivisible units equivalent to Planck's constant divided by 2 pi. This corresponds classically to only certain frequencies of rotation being allowed. |