String linear mass density is defined as mass/unit length. calculate the linear mass density in kg/m of a string with mass 0.3g and 1.5m length?

Linear mass density,

Explanation:

Given that,

Mass of the string, m = 0.3 g = 0.0003 kg

Length of the string, l = 1.5 m

The linear mass density of a string is defined as the mass of the string per unit length. Mathematically, it is given by :

or

So, the linear mass density of a string is . Hence, this is the required solution.

real, smaller and upside-down.   so the answer should be b.