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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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

Difference between Volt, Watt and Ampere

Can anyone explain the difference between watt, voltage and...

Question | 1 Answer

Which metals are the most reactive?

Does anyone know which metals are above average reactive or even the most reactive? I know that there is maybe no pat answer to this question,...

Question | 1 Answer

New Answers and Comments

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?

Chemox: The chlor-alkali electrolysis is used for the production of chlorine and caustic soda in large quantities. The process is still up-to-date today,...

Question | Which Chemicals are produced in the Chlor-Alkali Electrolysis?

Square: The centrifugal force comes from the Latin words centrum = middle and fugere = flee. So, it's fleeing from the middle. The centripetal force...

Question | Centripetal Force and Centrifugal Force: What is the Difference?

Chemox: All three terms are related to electricity. Depending on what you want to measure you take one or them. Each are units in which a certain amount of...

Question | Difference between Volt, Watt and Ampere

Chemox: Defining a general rule is really a bit difficult, but it can be derived from the periodic table. The fewer electrons in the valence shell, the more...

Question | Which metals are the most reactive?

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