Density: a Sphere Is Constructed of Two Concentric Parts

question 9

Essay

Density: A sphere is constructed of two concentric parts. The inner part is a solid sphere of radius 10.0 cm made of a material with density 4000 kg/m³. The outer part is a spherical shell with inner radius 10.0 cm and outer radius 20.0 cm. The material in the outer shell has a density 9000 kg/m³.
(a) What is the mass of the sphere?
(b) What is the average density of this sphere?

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Definitions:

Mask Parameter

A technique or value used to selectively filter or process information, often in digital communication or image processing.

Sequencer File

A structured list or table used in programming of automation systems, which controls the execution of operations in a fixed sequence.

Sequencer Instructions

Commands used in PLC programming that control the execution order of a series of operations.

Ladder Program

A graphical programming language used in industrial automation that represents circuits and logic control through symbols resembling a ladder.