Question

A cubical block of 10 cm on side floats at the interface between oil and water

Answer 1

The gauge pressure is given by the equation,

P=Dgh

where:

D is the density

g is the acceleration due to gravity

h is the height

(A) At the upper face of the block, we write:

P=(790)(9.8)(0.015)P=116.13 Pa

(B) at the lowe face,

P=(790)(9.8)(0.1)+116.13 PaP=890.33

(C) The mass is given as:

m=

weight

g

m=

(890.33∗116.13)∗102

9.8

m=7900