A Boy Wishes to Cross a River in the Shortest $\theta$

question 49

Multiple Choice

A boy wishes to cross a river in the shortest possible time, without necessarily landing directly across from his starting point. He can row at 2 m/s in still water and the river is flowing at 1 m/s. At what angle $\theta$ should he point the bow (front) of his boat?

• A) 30 \(\degree\)
• B) 45 \(\degree\)
• C) 60 \(\degree\)
• D) 63 \(\degree\)
• E) 90 \(\degree\)

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Definitions:

Gene-Environment Correlations

Refers to the phenomenon that an individual's genetic makeup influences their exposure to certain environmental factors.

Genetic Counseling

A professional service providing individuals and families with information about genetic conditions, risks, testing, and management.

Passive Gene-Environment Correlations

Instances where an individual's inherited characteristics influence the environment they are raised in.

Sex Chromosome Abnormalities

Genetic conditions that result from anomalies in the number or structure of sex chromosomes, affecting sexual development and health.