You Want to Design an Ideal Carnot Heat Engine That

question 21

Multiple Choice

You want to design an ideal Carnot heat engine that wastes only 35.0% of the heat that goes into it. The lowest cold-reservoir temperature available to you is +15.0°C. If 150.0 J of work is done per cycle, the heat input per cycle is closest to

• A) 203 J
• B) 231 J
• C) 248 J
• D) 429 J
• E) 760 J

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Definitions:

Springwood

The portion of a tree's annual growth ring that is formed in the early part of the growing season, characterized by larger and less dense cells than those produced later in the season.

Conducting Cells

Cells in plants that form the tubes for transporting water, minerals, and nutrients, namely xylem and phloem cells.

Sieve Tubes

A series of tube-like structures found in plants that are part of the phloem and responsible for transporting sugars and other organic nutrients.

Simple Diffusion

A process where molecules move from an area of higher concentration to an area of lower concentration until equilibrium is reached, without the need for energy input.