Conduction of Heat: the Walls of an Ice Chest Are

question 114

Multiple Choice

Conduction of heat: The walls of an ice chest are made of 2.00-mm-thick insulation having a thermal conductivity 0.00300 W/m∙K. The total surface area of the ice chest is 1.20 m². If 4.00 kg of ice at 0.00°C are placed in the chest and the temperature of the outside surface of the chest is 20.0°C, how long does it take the ice to melt under steady state conditions? The latent heat of fusion of water is 79.6 cal/g = 334 kJ/kg.

• A) 4.22 h
• B) 22.1 h
• C) 17.6 h
• D) 1.33 d
• E) 10.3 h

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Definitions:

Sound Waves

Noise that is transmitted through the air or another vehicle, becoming detectable when it encounters the ears of either people or animals.

Decibels

A unit of measurement for sound intensity or loudness, indicating the level of noise in comparison to a reference sound.

Hertz

The unit of frequency in the International System of Units (SI), signifying one cycle per second.

Basilar Membrane

A structure in the cochlea of the inner ear that plays a key role in the perception of sound, vibrating in response to sound waves and thereby stimulating hair cells to send nerve impulses to the brain.