A Block of Mass M = 0 $\mu$ _k = 0 $\circ$

question 38

Multiple Choice

A block of mass m = 0.2 kg slides across a rough horizontal surface with coefficient of kinetic friction $\mu$ _k = 0.5. What is the change in entropy after the block has moved a distance of 1 m? The temperature of the block and surrounding is 22 ^$\circ$ C.

• A) 4.5\(\times\) ^-2 J/K
• B) 3.3\(\times\) ^-3 J/K
• C) 6.7\(\times\)10 ^-3 J/K
• D) 9.0\(\times\)10 ^-3 J/K
• E) zero

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Definitions:

NADH

Nicotinamide adenine dinucleotide (reduced form), a coenzyme involved in redox reactions, carrying electrons from one reaction to another in cellular respiration.

Electron Transport Chain

A series of complexes that transfer electrons from electron donors to electron acceptors via redox reactions, and couples this electron transfer with the transfer of protons (H+ ions) across a membrane.

ATPs

A molecule known as ATP, which serves as an energy carrier within cells to fulfill metabolic needs.

Molecule

Substance composed of two or more atoms chemically combined to form a structure that behaves as an independent unit.