Natural Science and Mathematics

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For topics on computer science, see the portal Programming and Computer Science, for humanities topics refer to the portal Art, Culture, People, Politics and Society

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Calculation of the Free Fall

If we know the local gravity respectively the gravitational acceleration, the acceleration due to gravity or the location factor of a location, we...

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Calculation of the Local Gravity

The local gravity, which we also know as gravitational acceleration, acceleration due to gravity or location factor can easily be calculated from the...

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Endothermic and Exothermic Reactions: Examples and a simple Explanation

Our chemistry teacher wants us to put together some examples of exothermic and endothermic chemical reactions over the weekend. I have no idea about...

Question | 1 Answer

What is falling faster in a vacuum: A ball or a feather?

Assuming, we have a ball and a feather and drop them next to each other in a vacuum, what would fall faster? The ball or the feather? Our physics...

Question | 1 Answer

Which Chemicals are produced in the Chlor-Alkali Electrolysis?

I wonder which chemicals are produced in the chlor-alkali electrolysis. And is the procedure still common today? Or is this process already...

Question | 1 Answer

Centripetal Force and Centrifugal Force: What is the Difference?

I have a small problem in my physics lessons. Repeatedly, I confuse the two forces "centripetal force" and "centrifugal force". Can someone explain...

Question | 2 Answers

New Answers and Comments

Guest: Too many numbers for my...

Info | The first 100,000 Digits of Pi

Guest: Make it 200,000 so I can annoy my classmates for 32 hours and 18...

Info | The first 100,000 Digits of Pi

Guest: The object remains the same weight. Only the force required to lift this object becomes about six times lighter than on...

Question | Local Gravity on the Moon

Guest: One day - which are 24 hours - has 86400...

Question | How many seconds does a day have?

Collin McNeil: There are already some articles on this page about this. Just have a look here: Explanation, similarities and differences between endothermic and...

Question | Endothermic and Exothermic Reactions: Examples and a simple Explanation

Chemox: A ball and a feather are falling at exactly the same speed in a vacuum. Normally, you would be right with your assumption that the ball is faster,...

Question | What is falling faster in a vacuum: A ball or a feather?

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