College Physics

Figure 14.7(a) Energy is required to partially overcome the attractive forces between molecules in a solid to form a liquid. Tha ...

Table 14.2Heats of Fusion and Vaporization[4] Lf Lv Substance Melting point (ºC) kJ/kg kcal/kg Boiling point (°C) kJ/kg kcal/kg ...

Water can evaporate at temperatures below the boiling point. More energy is required than at the boiling point, because the kine ...

Figure 14.9Condensation forms on this glass of iced tea because the temperature of the nearby air is reduced to below the dew po ...

Figure 14.11Direct transitions between solid and vapor are common, sometimes useful, and even beautiful. (a) Dry ice sublimates ...

Conductionis heat transfer through stationary matter by physical contact. (The matter is stationary on a macroscopic scale—we k ...

in two bodies at different temperatures. The (average) kinetic energy of a molecule in the hot body is higher than in the colder ...

Example 14.5 Calculating Heat Transfer Through Conduction: Conduction Rate Through an Ice Box A Styrofoam ice box has a total ar ...

Table 14.3Thermal Conductivities of Common Substances[7] Substance Thermal conductivityk (J/s⋅m⋅ºC) Silver 420 Copper 390 Gold 3 ...

(14.32) T 2 −T 1 = Q t ⎛ ⎝ d kA ⎞ ⎠. Solution Identify the knowns and convert them to the SI units. The thickness of the pan,d ...

Figure 14.17Air heated by the so-called gravity furnace expands and rises, forming a convective loop that transfers energy to ot ...

Discussion This rate of heat transfer is equal to the power consumed by about forty-six 100-W light bulbs. Newly constructed hom ...

Example 14.8 Calculate the Flow of Mass during Convection: Sweat-Heat Transfer away from the Body The average person produces he ...

Figure 14.21Convection accompanied by a phase change releases the energy needed to drive this thunderhead into the stratosphere. ...

Figure 14.23Most of the heat transfer from this fire to the observers is through infrared radiation. The visible light, although ...

Gray objects have a uniform ability to absorb all parts of the electromagnetic spectrum. Colored objects behave in similar but m ...

temperature in the body, perhaps indicative of disease. Similar techniques can be used to detect heat leaks in homesFigure 14.27 ...

Figure 14.28The greenhouse effect is a name given to the trapping of energy in the Earth’s atmosphere by a process similar to th ...

conduction: convection: emissivity: greenhouse effect: heat of sublimation: heat: kilocalorie: latent heat coefficient: mechanic ...

Most substances can exist either in solid, liquid, and gas forms, which are referred to as “phases.” Phase changes occur at fix ...