User niels nielsen

175 votes

Accepted

Why do fans spin backwards slightly after they (should) stop?

answered Feb 16, 2021 at 21:04

166 votes

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Why do spaceships heat up when entering earth but not when exiting?

answered Dec 31, 2017 at 4:05

142 votes

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Why does a sticker slowly peel off, but if it is pulled quickly it tears?

answered Aug 25, 2019 at 22:03

131 votes

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Why bother buying efficient lights if you are already heating your house?

answered Oct 27, 2021 at 4:42

109 votes

Why doesn't the road lose its thickness to the tyre?

answered Dec 8, 2019 at 19:41

104 votes

Why do rain drops fall with a constant velocity?

answered Oct 1, 2021 at 5:21

76 votes

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Why does the humidifier make a stove's flame orange?

answered Nov 18, 2018 at 2:25

76 votes

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Why can we distinguish different pitches in a chord but not different hues of light?

answered Dec 1, 2018 at 2:33

69 votes

Why do fusion and fission both release energy?

answered Jan 30, 2019 at 1:42

62 votes

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What is meant by "gravity waves we see at sea surface"?

answered Dec 16, 2019 at 3:32

58 votes

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Do bubbles get created when you move something in water?

answered Oct 1, 2020 at 17:06

57 votes

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Emissitivity of copper - Why are copper heatsinks all shiny?

answered May 14, 2018 at 16:08

55 votes

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Are the physical structures in our sun of comparable complexity to those in the human brain?

answered Jun 2, 2021 at 16:40

53 votes

Why does pressure in a thermos increase after shaking up hot water and soap?

answered Feb 25, 2021 at 20:54

52 votes

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How can Planck's constant take different values?

answered Jan 17, 2022 at 15:22

51 votes

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Why does the vapour bubble in an inkjet printhead collapse so fast?

answered Mar 11, 2022 at 7:07

50 votes

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Is sound a classical mechanic phenomenon or is it a quantum effect?

answered Dec 10, 2021 at 3:39

47 votes

Vacuum collapse -- why do strong metals implode but glass doesn't?

answered Aug 19, 2019 at 6:26

46 votes

What explanations are there for a rug steadily creeping at about a millimeter/day rate across a room?

answered Nov 3, 2017 at 18:42

46 votes

Why are steel thermal mugs much better than plastic ones?

answered May 31, 2020 at 23:31

45 votes

How is it possible there are UV photos while our eyes cannot detect UV waves?

answered Feb 1, 2020 at 20:18

45 votes

Could one perform a test to determine whether water was warmed by a microwave rather than over a flame?

answered Jan 11 at 16:28

44 votes

Why do we use capacitors and not batteries in defibrillator?

answered Jan 2, 2018 at 17:44

43 votes

How do computers store sound waves just by sampling the amplitude of a wave and not the frequency?

answered Oct 24, 2023 at 16:34

43 votes

Why light can't escape a black hole but can escape a star with same mass?

answered Jan 31, 2023 at 19:29

40 votes

How can electric fields be used to detect cracks in metals?

answered Jun 4, 2019 at 5:38

37 votes

Why does water falling slowly from a tap bend inwards?

answered Jan 19, 2020 at 19:51

35 votes

Is every open circuit a capacitor?

answered Mar 6, 2019 at 17:31

35 votes

Why doesn't the windshield fog up where my kid drew on it with her fingers?

answered Jan 9 at 4:44

35 votes

What impact does air have on our weight?

answered Nov 27, 2021 at 19:50

Stack Exchange Network

3,215 Answers

Why do fans spin backwards slightly after they (should) stop?

Why do spaceships heat up when entering earth but not when exiting?

Why does a sticker slowly peel off, but if it is pulled quickly it tears?

Why bother buying efficient lights if you are already heating your house?

Why doesn't the road lose its thickness to the tyre?

Why do rain drops fall with a constant velocity?

Why does the humidifier make a stove's flame orange?

Why can we distinguish different pitches in a chord but not different hues of light?

Why do fusion and fission both release energy?

What is meant by "gravity waves we see at sea surface"?

Do bubbles get created when you move something in water?

Emissitivity of copper - Why are copper heatsinks all shiny?

Are the physical structures in our sun of comparable complexity to those in the human brain?

Why does pressure in a thermos increase after shaking up hot water and soap?

How can Planck's constant take different values?

Why does the vapour bubble in an inkjet printhead collapse so fast?

Is sound a classical mechanic phenomenon or is it a quantum effect?

Vacuum collapse -- why do strong metals implode but glass doesn't?

What explanations are there for a rug steadily creeping at about a millimeter/day rate across a room?

Why are steel thermal mugs much better than plastic ones?

How is it possible there are UV photos while our eyes cannot detect UV waves?

Could one perform a test to determine whether water was warmed by a microwave rather than over a flame?

Why do we use capacitors and not batteries in defibrillator?

How do computers store sound waves just by sampling the amplitude of a wave and not the frequency?

Why light can't escape a black hole but can escape a star with same mass?

How can electric fields be used to detect cracks in metals?

Why does water falling slowly from a tap bend inwards?

Is every open circuit a capacitor?

Why doesn't the windshield fog up where my kid drew on it with her fingers?

What impact does air have on our weight?