A Sphere of Radius 1 Cm Is Moving Through a Vat

question 25

Multiple Choice

A sphere of radius 1 cm is moving through a vat of corn syrup, which has a viscosity of 1.4 Pa s. A force of 0.01 N is needed to keep it moving at a constant speed. What is the speed? You may assume that Stokes' law applies.

• A) 3.8 cm s-1.
• B) 26 cm s-1.
• C) 23 cm s-1.
• D) 12 cm s-1.
• E) 6.8 cm s-1.ANS

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Definitions:

Genome Wide Association

A study approach that involves rapidly scanning markers across complete sets of DNA, or genomes, of many people to find genetic variations associated with a particular disease.

Quantitative Trait Locus

A Quantitative Trait Locus (QTL) is a region of DNA that is associated with a particular phenotypic trait, which varies in degree and can be attributed to polygenic effects.

Genetically Divergent Populations

Populations that have accumulated genetic differences due to barriers to gene flow, resulting in genetic distinction from each other.

Linkage Disequilibrium

The non-random association of alleles at two or more loci, not necessarily on the same chromosome, which can influence genetic traits and disease risks.