User DJohnM

146 votes

Accepted

How do grandfather clocks keep going?

answered Jun 3, 2015 at 4:25

51 votes

Accepted

Conservation of momentum when rain pours into a wagon

answered Dec 15, 2014 at 6:29

43 votes

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In $_6^{14}\mathrm C$ decay, how is mass-energy conserved?

answered Jan 30, 2017 at 16:54

32 votes

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How did Kelvin make this fascinating calculation?

answered Oct 13, 2014 at 23:54

27 votes

How does holding a glass prevent it from falling?

answered Mar 30, 2018 at 5:44

26 votes

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How do astronauts measure weight/mass on other planets?

answered Mar 29, 2016 at 5:13

20 votes

What do units like joule * seconds imply?

answered Dec 22, 2014 at 4:42

18 votes

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How does an object undergoing circular motion increase its tangential velocity?

answered Nov 21, 2016 at 3:47

14 votes

The effect of A/C and global warming

answered Jul 14, 2014 at 3:35

13 votes

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How come a whistling kettle starts whistling only when water boils, and not long before - due to hot air escaping under pressure?

answered Apr 14, 2014 at 2:15

12 votes

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Does wave interference happen only to same frequency waves?

answered Dec 22, 2014 at 16:32

11 votes

How do control rods work?

answered Nov 2, 2014 at 8:33

10 votes

When I drink with a straw, is the atmospheric pressure pushing the water or me sucking it?

answered Dec 17, 2021 at 15:12

10 votes

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Confusion with Doppler effect problem

answered Jun 25, 2022 at 15:34

10 votes

Behavior of a loose coin on a free fall ride

answered Jun 30, 2022 at 2:54

9 votes

How is the power of water flowing through a pipe directly proportional to $v³$ and not $v²$?

answered Oct 27, 2018 at 3:52

7 votes

Put a bullet into orbit around the moon

answered Aug 13, 2014 at 4:17

7 votes

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In calculating work done by a constant force over a constant distance, why doesn't the subject's initial velocity matter?

answered Apr 11, 2014 at 4:34

7 votes

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What provides the centripetal force for a glider?

answered Apr 23, 2014 at 16:38

7 votes

What is happening to rotational kinetic energy when moment of inertia is changed?

answered Jan 13, 2014 at 20:58

6 votes

Pouring water in an aircraft while upside down?

answered Mar 3, 2014 at 0:38

6 votes

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Can a box on a frictionless rotating table rotate?

answered Oct 18, 2014 at 17:08

6 votes

Can mass be directly measured without measuring its weight?

answered Oct 2, 2014 at 4:57

6 votes

Airplane with banner in a windy day

answered Oct 15, 2013 at 0:08

6 votes

Frequency difference when water splashes at different temperatures

answered Feb 16, 2017 at 8:35

5 votes

Doesn't a box holding a vacuum weigh the same as a box full of air?

answered Dec 6, 2014 at 23:06

5 votes

Why do we call a white led with high color temperature "cool"?

answered Jan 26, 2015 at 22:26

5 votes

Isotope with longest decay chain to reach a stable isotope

answered Feb 12, 2015 at 21:25

5 votes

Accepted

Automobile Air bags

answered Dec 26, 2015 at 15:34

5 votes

Reason for strange "canyons" of dust on the cooling platform

answered Oct 16, 2013 at 20:03

Stack Exchange Network

341 Answers

How do grandfather clocks keep going?

Conservation of momentum when rain pours into a wagon

In $_6^{14}\mathrm C$ decay, how is mass-energy conserved?

How did Kelvin make this fascinating calculation?

How does holding a glass prevent it from falling?

How do astronauts measure weight/mass on other planets?

What do units like joule * seconds imply?

How does an object undergoing circular motion increase its tangential velocity?

The effect of A/C and global warming

How come a whistling kettle starts whistling only when water boils, and not long before - due to hot air escaping under pressure?

Does wave interference happen only to same frequency waves?

How do control rods work?

When I drink with a straw, is the atmospheric pressure pushing the water or me sucking it?

Confusion with Doppler effect problem

Behavior of a loose coin on a free fall ride

How is the power of water flowing through a pipe directly proportional to $v³$ and not $v²$?

Put a bullet into orbit around the moon

In calculating work done by a constant force over a constant distance, why doesn't the subject's initial velocity matter?

What provides the centripetal force for a glider?

What is happening to rotational kinetic energy when moment of inertia is changed?

Pouring water in an aircraft while upside down?

Can a box on a frictionless rotating table rotate?

Can mass be directly measured without measuring its weight?

Airplane with banner in a windy day

Frequency difference when water splashes at different temperatures

Doesn't a box holding a vacuum weigh the same as a box full of air?

Why do we call a white led with high color temperature "cool"?

Isotope with longest decay chain to reach a stable isotope

Automobile Air bags

Reason for strange "canyons" of dust on the cooling platform