An Object Having a Fixed Emissivity of 0

question 102

Multiple Choice

An object having a fixed emissivity of 0.725 radiates heat at a rate of 10 W when it is at an absolute temperature T.If its temperature is doubled to 2T,at what rate will it now radiate?

• A)20 W
• B)40 W
• C)80 W
• D)160 W
• E)320 W

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Definitions:

Cork Cambium

A layer of tissue in plants that produces cork (phellem) cells for protection and waterproofing.

Lignin

A complex organic polymer found in the cell walls of many plants, making them rigid and woody and providing structural support.

Sclerenchyma

In plants, simple tissue composed of cells that die when mature; their tough walls structurally support plant parts. Includes fibers, sclereids.

Ground Tissue

A plant tissue system that makes up the bulk of most plants, involved in photosynthesis, storage, and support; includes parenchyma, collenchyma, and sclerenchyma cells.