A Lab Assistant Drops a 400 $15.0 ^ { \circ } \mathrm { C }$

question 56

Multiple Choice

A lab assistant drops a 400.0-g piece of metal at 100.0°C into a 100.0-g aluminum cup containing 500.0 g of water at $15.0 ^ { \circ } \mathrm { C }$ In a few minutes, she measures the final temperature of the system to be 40.0°C. What is the specific heat of the 400.0-g piece of metal, assuming that no significant heat is exchanged with the surroundings? The specific heat of this aluminum is 900.0 J/kg ∙ K and that of water is 4186 J/kg ∙ K.

• A) 1900 J/kg ∙ K
• B) 2270 J/kg ∙ K
• C) 3300 J/kg ∙ K
• D) 3800 J/kg ∙ K
• E) 4280 J/kg ∙ K

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Definitions:

Demand

The capacity of consumers to purchase a good or service, considering their willingness and financial ability, at diverse prices over an established period.

Economic Inefficiencies

Circumstances where resources are not optimally allocated, leading to waste or losses in potential value within an economy.

Product Variety

The assortment of different goods or services offered by a firm or market to cater to diverse consumer preferences.

Monopolistically Competitive

A marketplace configuration in which a wide variety of firms supply products that are analogous but not identical, thereby granting them a modicum of market influence.