I Place a 250-G Ice Cube (Initially at 0 $\degree$ C) in a Styrofoam Box with Wall Thickness 1

question 71

Multiple Choice

I place a 250-g ice cube (initially at 0 $\degree$ C) in a Styrofoam box with wall thickness 1.0 cm and total surface area 600 cm². If the air surrounding the box is at 20 $\degree$ C and after 2 hours the ice is completely melted, what is the conductivity of the Styrofoam material? (L_f = 80 cal/g)

• A) 9.6 *10^-5
• B) 2.8 * 10^-6
• C) 1.15 * 10^-2
• D) 2.3 *10^-4

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Definitions:

Endocrine Glands

Glands that secrete hormones directly into the bloodstream to regulate various bodily functions.

TSH

Thyroid Stimulating Hormone, a pituitary hormone that regulates the production of hormones by the thyroid gland.

Anterior Pituitary Gland

A major gland of the endocrine system located at the base of the brain, responsible for producing and releasing hormones that regulate various bodily functions.

Thyroid Hormones

Chemical substances produced by the thyroid gland, such as thyroxine (T4) and triiodothyronine (T3), which regulate metabolism, energy generation, and growth and development.