A Stone Is Dropped into a Lake, Creating a Circular $45 \mathrm {~cm} / \mathrm { s }$

question 61

Short Answer

A stone is dropped into a lake, creating a circular ripple that travels outward at a speed of $45 \mathrm {~cm} / \mathrm { s }$ . Express the radius $r$ of this circle as a function of the time $t$ (in seconds) and find $A \circ r$ , if $A$ is the area of this circle as a function of the radius.

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Definitions:

Observable Characteristics

Traits or features of an individual or object that can be directly seen or measured without the need for inference.

Genotype

Genetic makeup of a person, containing both expressed and unexpressed characteristics.

Sexual Differentiation

The biological process by which the differences between males and females are established, typically involving the development of reproductive organs and secondary sexual characteristics.

Embryos

Early developmental stages of a multicellular organism following fertilization, before reaching the fetal stage.