Answered: K-30.0 cm – Wooden disk - Oil 75.0 cm

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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Question

A cylindrical disk of
wood weighing 45.0 N and having a
diameter of 30.0 cm floats on a cylinder
of oil of density 0.850 g /cm3
(Fig.). The cylinder of oil
is 75.0 cm deep and has a diameter
the same as that of the wood.
(a) What is the gauge pressure at the
top of the oil column? (b) Suppose
now that someone puts a weight
of 83.0 N on top of the wood, but
no oil seeps around the edge of the
wood. What is the change in pressure
at (i) the bottom of the oil and
(ii) halfway down in the oil?

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