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Physics
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DJohnM's user avatar
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DJohnM
  • Member for 11 years, 7 months
  • Last seen this week
  • Toronto, Canada
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Retired community college professor

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Top posts
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146
How do grandfather clocks keep going?
Jun 3, 2015
answer
51
Conservation of momentum when rain pours into a wagon
Dec 15, 2014
answer
44
In $_6^{14}\mathrm C$ decay, how is mass-energy conserved?
Jan 30, 2017
answer
32
How did Kelvin make this fascinating calculation?
Oct 13, 2014
answer
27
How does holding a glass prevent it from falling?
Mar 30, 2018
answer
26
How do astronauts measure weight/mass on other planets?
Mar 29, 2016
answer
20
What do units like joule * seconds imply?
Dec 22, 2014
answer
18
How does an object undergoing circular motion increase its tangential velocity?
Nov 21, 2016
answer
14
The effect of A/C and global warming
Jul 14, 2014
answer
13
How come a whistling kettle starts whistling only when water boils, and not long before - due to hot air escaping under pressure?
Apr 14, 2014
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114
What would prevent me from taking advantage of scammers?
51
If you have a home mortgage, why do you still have to pay all of the property tax?
51
Why does this movie say a witness can't present a jury with testimony which would assist in making a determination of guilt or innocence?
39
What if there is no Presidential winner on Jan 20?
38
How can I find the surface area of a normal chicken egg?