A Lab Assistant Pours 330 G of Water at 45°C $900 \mathrm {~J} / \mathrm { kg } \cdot \mathrm { K } ,$

question 23

Multiple Choice

A lab assistant pours 330 g of water at 45°C into an 855-g aluminum container that is at an initial temperature of 10°C.The specific heat of aluminum is $900 \mathrm {~J} / \mathrm { kg } \cdot \mathrm { K } ,$ and that of water is 4186 J/kg ∙ K.What is the final temperature of the system,assuming no thermal energy is exchanged with the surroundings?

• A)28°C
• B)32°C
• C)31°C
• D)33°C
• E)35°C

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The small vocal and visual comments a listener makes while a speaker is talking, without taking over the speaking turn. This includes responses such as “Yeah,” “Huh?” “M-hmn,” head nods, brief smiles, and completions of the speaker’s words. Back-channel feedback is crucial to coordinate conversation smoothly.

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