(A) Assuming That the Earth Is a Solid Sphere of Uniform

question 6

Essay

(a) Assuming that the earth is a solid sphere of uniform density, calculate its moment of inertia and its rotational energy.
(b) The earth's rotation is slowing (i.e., the earth is losing rotational energy). The earth's rotational period (the length of the day) is increasing at a rate of $1.7 \times 10 ^ { - 5 } \mathrm {~s}$ per year. Calculate the annual rotational energy loss of the earth and compare this to the annual energy use by society.

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Definitions:

Goodwill

A positive perception of an author on the part of the audience.

Correspondence

Business letters sent to customers, coworkers, superiors, and subordinates.

Priority

Something that is regarded as more important than another and therefore needs to be dealt with first.

General-to-specific

A pattern of organization where information is presented from broad concepts to detailed points, often used in writing and speech.