If I Throw a Rock in a Lake at 30°

question 47

Essay

If I throw a rock in a lake at 30° or 60° from horizontal,with the same initial speed,it will splash on the same spot.So what is the difference? Should we only consider angles from 0° to 45°?

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Definitions:

21st Chromosome

A chromosome in humans that, when an individual has three copies (trisomy 21) rather than the usual two, causes Down syndrome.

Down Syndrome

A genetic disorder caused by the presence of all or part of a third copy of chromosome 21, characterized by developmental delays, physical growth limitations, and distinctive facial features.

Phenylketonuria

A genetic disorder in which the body cannot properly break down an amino acid called phenylalanine, leading to harmful levels in the body.

Preconception Test

A preconception test is a medical test or evaluation performed before pregnancy to assess the health and genetic conditions that could affect a potential pregnancy.