Is the specific heat of water greater than that of sand?

Explain the heat capacity of a substance and write its equation and unit.

The density of a material $A$ is $1500 \ kg/m^3$ and that of another material $B$ is $2000 \ kg/m^3$. It is found that the heat capacity of $8$ volumes of $A$ is equal to the heat capacity of $12$ volumes of $B$. The ratio of specific heats of $A$ and $B$ will be

$A$ substance is cooled at a constant power. Its temperature vs time graph is shown. The value of $S_{solid} : S_{liquid} : S_{gas}$ is:

Why is the wind coming from the sea cool at the shores?

What is specific heat? Give its unit and on which factors does specific heat depend?