Iced Tea Is Made by Adding Ice to 3 $\degree$ C How Many Kg of Ice, Initially at 0

question 61

Multiple Choice

Iced tea is made by adding ice to 3.0 kg of hot tea, initially at 80 $\degree$ C. How many kg of ice, initially at 0 $\degree$ C, are required to bring the mixture to 10 $\degree$ C? (L_f = 3.33 x 10⁵ J/kg, c_w = 4186 J/kg· $\degree$ C)

• A) 2.8 kg
• B) 1.6 kg
• C) 1.4 kg
• D) 2.3 kg

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Definitions:

REM Rebound

The phenomenon where there is an increase in the amount of REM (Rapid Eye Movement) sleep after a period of REM sleep deprivation.

Slow-Wave Sleep

The deepest phase of non-REM sleep, characterized by slow brain waves, reduced heart rate, and deep physical relaxation, which is restorative and vital for memory consolidation.

Bed-Wetting

Involuntary urination while asleep, especially common in children.

Sleep Spindles

A burst of oscillatory brain activity visible on an EEG that occurs during stage 2 of non-REM sleep.