A Household Humidifier Continuously Takes Water in at 20

question 1

Multiple Choice

A household humidifier continuously takes water in at 20.0 °C at a rate of 5.60 × 10^-5 kg/s and heats it until it evaporates. If the cost of electricity is $ 0.14/kWh, what is the daily cost of operating the humidifier? Notes: one kWh = 3.60 × 10⁶ J; and for water, the specific heat capacity is 4186 J/(kg · C°) ; the latent heats of fusion and vaporization are 3.35 × 10⁵ J/kg and 2.26 × 10⁶ J/kg, respectively.

• A)$ 0.31
• B)$ 0.49
• C)$ 0.58
• D)$ 0.65
• E)$ 0.70

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Definitions:

Nonsense Syllables

Strings of letters that do not follow grammatical rules and have no meaning, used in psychological experiments to study memory and learning.

Methodology

The system of methods followed in a particular discipline or field of study.

Forgetting

The inability to bring to mind information that was previously remembered.

Drew a Blank

describes the moment when an individual is unable to recall information or think of an answer suddenly.