Top network posts

• 30 Doesn't a box holding a vacuum weigh the same as a box full of air?
• 28 Are there areas of mathematics (current or future) that cannot be formalized in set theory?
• 21 Can elements heavier than iron be present in a star's core?
• 19 Understanding the zero current in a simple circuit
• 18 How abruptly does the Doppler shift change sign?
• 16 In reverse time, do objects at rest fall upwards?
• 16 Would a perfectly clean and perfectly smooth champagne glass have no bubbles?
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