A Container Is Filled with Water and the Pressure at the Bottom

question 50

Multiple Choice

A container is filled with water and the pressure at the bottom of the container is P.Then the container is emptied halfway and topped off with oil of density 0.8 × 10³ kg/m³,which floats on top of the water.What is the pressure at the bottom of the container now?

• A)a pressure < P
• B)the same pressure P
• C)a pressure > P
• D)This is unable to be determined with the information given.
• E)​a pressure < 0.5P

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Definitions:

Open Circulatory System

A type of circulatory system found in some invertebrates where blood flows freely in the body cavity, bathing organs directly in blood.

Polyp

A hydralike animal; the sessile stage of the life cycle of certain cnidarians. Compare with medusa.

Stinging Cell

A Stinging Cell, or cnidocyte, is a specialized cell found in the tentacles of jellyfish and other cnidarians used for prey capture and defense by discharging a toxic substance.

Radula

A unique, toothed structure found in mollusks, used for scraping or cutting food before ingestion.