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38:33 Earth Science: Lecture 32 - The Terrestrial Planets Spahn's Science Lectures 2.3K views - 6 years ago
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22:39 Earth Science: Lecture 27 - Patterns in the Night Sky Spahn's Science Lectures 2.6K views - 6 years ago
34:06 General Astronomy: Lecture 20 - Why the Sun Shines Spahn's Science Lectures 4.3K views - 8 years ago
41:13 College Physics 1: Lecture 17 - Weight, Apparent Weight, and Normal Force Spahn's Science Lectures 8.8K views - 4 years ago
39:46 College Physics 1: Lecture 29 - Forms of Energy Spahn's Science Lectures 6.4K views - 3 years ago
45:03 College Physics 1: Lecture 25 - Moment of Inertia and Rotational Dynamics Spahn's Science Lectures 7.6K views - 3 years ago
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25:18 College Physics 1: Lecture 30 - Conservation of Energy Spahn's Science Lectures 8.2K views - 3 years ago
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