Temperature & Heat

Mechanical Equivalent of Heat

Video RealVideo®
8:48 minutes (30:19 - 39:07)

Definition, with demonstrations of using a crank to power light bulbs and of acid battery cells.

Instructor: Prof. Walter Lewin
Prior Knowledge: Heat Energy (20:04 of V14)
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Video RealVideo®
5:26 minutes (39:07 - 44:33)

Discussion of world power consumption; feasibility of solar power; nuclear power and demonstration of radioactive china.

Instructor: Prof. Walter Lewin
Prior Knowledge: None
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Video RealVideo®
5:27 minutes (44:33 - 50:00)

Discussion of limited availability of fossil fuels; fusion power; demostration of glowing balls with a mysterious power source.

Instructor: Prof. Walter Lewin
Prior Knowledge: None
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Heat Transfer & Thermal Expansion

Video RealVideo®
8:31 minutes (9:05 - 17:36)

Equation for linear expansion; coefficients for 5 common substances; example of railroads; demonstration of expansion of a brass rod when heated and cooled.

Instructor: Prof. Walter Lewin
Prior Knowledge: None
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Video RealVideo®
6:21 minutes (17:36 - 23:57)

Example and calculation of expansion properties; use in thermostats; demonstration of a bimetal bending.

Instructor: Prof. Walter Lewin
Prior Knowledge: Linear Expansion (9:05 of V32)
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Video RealVideo®
6:37 minutes (23:57 - 30:34)

Bimetals in thermometers, coils, and heating systems. Demonstration of heating and cooling bimetal in a thermometer.

Instructor: Prof. Walter Lewin
Prior Knowledge: Bimetals (17:36 of V32)
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Video RealVideo®
10:33 minutes (30:34 - 41:07)

Derivation from linear expansion, with example; demonstration of heating mercury in thermometers.

Instructor: Prof. Walter Lewin
Prior Knowledge: Linear Expansion (9:05 of V32)
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Video RealVideo®
4:21 minutes (41:07 - 45:28)

Definition; demonstration of the opposite using a heated brass ball.

Instructor: Prof. Walter Lewin
Prior Knowledge: Cubic Expansion (30:34 of V32)
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