A 01-Kg Aluminum Plate,initially at 20°C,slides Down a 14-M-Long Surface,inclined at at a 29°

question 58

Multiple Choice

A 0.1-kg aluminum plate,initially at 20°C,slides down a 14-m-long surface,inclined at a 29° angle to the horizontal.The force of kinetic friction exactly balances the component of gravity down the plane so that the plate,once started,glides down at constant velocity.If 90% of the mechanical energy of the system is absorbed by the aluminum,what is its temperature increase at the bottom of the incline? (Specific heat for aluminum is 900 J/kg⋅°C. )
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• A) 0.120 C°
• B) 0.07 C°
• C) 0.67 C°
• D) 1.03 C°
• E) 59.86 C°

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Definitions:

Enzyme

Biological molecules that significantly speed up the rate of virtually all of the chemical reactions that take place within cells.

Protein

Large, complex molecules made up of amino acids that perform a wide range of functions in the body, including structural support, catalyzing metabolic reactions, and immune response.

mRNA

Messenger RNA, a type of RNA that conveys genetic information from DNA to the ribosome, where it specifies the amino acid sequence of the protein products of gene expression.

Protein Structure

The specific three-dimensional arrangement of amino acids in a protein, determining its function and activity, includes primary, secondary, tertiary, and quaternary structures.