A wooden block of height and density is placed upright in a tank containing of oil of…

PHYSICS · Single correct · AP · Physics 1: Algebra-based · Fluids · Fluids

Problem

A wooden block of height

20\,\text{cm}

and density

820\,\text{kg m}^{-3}

is placed upright in a tank containing

12\,\text{cm}

of oil of density

700\,\text{kg m}^{-3}

over water of density

1000\,\text{kg m}^{-3}

. The top of the block stays level with the oil surface. How much of the block’s height is immersed in the water? (a)

6\,\text{cm}

(b)

11\,\text{cm}

(c)

8\,\text{cm}

(d)

4\,\text{cm}