A Block of Wood Weighs 160 N and Has a Specific

question 20

Multiple Choice

A block of wood weighs 160 N and has a specific gravity of 0.60.To sink it in fresh water requires an additional downward force of:

• A)54 N
• B)64 N
• C)96 N
• D)110 N
• E)240 N

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Definitions:

PYY

A hormone, short for Peptide YY, produced in the gut in response to eating and is associated with reducing appetite and inhibiting food intake.

Leptin

A hormone produced by fat cells that is involved in the regulation of appetite and metabolism, often affecting feelings of satiety and hunger.

Stomach Contractions

Involuntary movements of the stomach muscles that mix and propel contents through the gastrointestinal tract.

Hypothalamus

This part of the brain, positioned under the thalamus, serves to regulate the autonomic nervous system and the actions of the pituitary, playing a significant role in the control of body temperature, the sensations of thirst and hunger, and the overall maintenance of the body’s equilibrium.