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Rev. Green

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Rev. Green

Minimum Number Of Dances?

We've been invited to a ballroom dance in ten months' time. What is the minimum number of dances to learn to participate most of the time? Can we get away with just two: one in common time and one... ...
23:01 Sun 05th Nov 202310 answers, last by Old_Geezer 09:51 Mon 06th Nov 2023
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Rev. Green

Therefore, Jew

"The quality of mercy is not strained. It droppeth as the gentle rain from heaven upon the place beneath... Therefore, Jew, though justice be thy plea, consider this: that in the course of justice... ...
11:48 Tue 24th Oct 202367 answers, last by andy-hughes 17:06 Wed 25th Oct 2023
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Rev. Green

Gravitational Anomalies

Is there an archive of answerbank questions? I'd like to see a question I asked some years ago about the possibility that dark energy and dark matter could be explained away by modifying the way that...
16:43 Sat 12th Aug 202315 answers, last by Rev. Green 13:03 Sun 13th Aug 2023
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Rev. Green

What Gravity Is Within A Shell Of Matter?

It is straightforward to show, using the inverse-square law, that a uniform shell of matter produces no gravitational force in the space within it. However, the inverse-square law assumes Newtonian...
10:19 Mon 15th May 20232 answers, last by Rev. Green 12:18 Mon 15th May 2023
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Rev. Green

Are Black Holes Hollow?

If we drop a lamp into a black hole, the lamp might reach the event horizon without being crushed. We would see the lamp becoming redder, but if we could observe longer and longer radio waves, it...
14:48 Sun 14th May 202310 answers, last by Hymie 12:36 Mon 15th May 2023
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Rev. Green

Fried Eggs, "In The Clouds"

An egg cooked "sunny side up" produces an overcooked yolk if it is cooked long enough for the albumen to set. "Easy over" rarely produces an acceptable result. Is there a name for the way of frying an...
21:03 Fri 24th Feb 202318 answers, last by Vagus 16:48 Sat 25th Feb 2023
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Rev. Green

Gravel Road Ridges

Ridges sometimes form across gravel roads when there is sufficient traffic. The roads are basically flat with a sprinkling of small stones. The stones group together into bands, about 15cm apart,...
20:49 Fri 24th Feb 20234 answers, last by sddsddean 21:28 Fri 24th Feb 2023
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Rev. Green

Telephoto Glasses

My optician says that spectacles cannot correct the condition where one eye sees a smaller image than the other. Is it possible to obtain a slight wide-angle lens for one eye, or a slight telephoto...
20:42 Fri 24th Feb 20231 answer, last by Buenchico 20:53 Fri 24th Feb 2023
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Rev. Green

Binary Addition

What is the name of numbers whose binary codes are minimally different? I'd like to Neeva them to see if they have an addition algorithm. The numbers 1 to 9 are coded 1, 11, 10, 110, 111, 101, 100,...
10:32 Mon 16th Jan 20236 answers, last by Canary42 15:12 Mon 16th Jan 2023
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Rev. Green

Post-Strike Pay

After I've been on strike, should I expect my employer to accept me back at the same level of pay, even though I have proved to be unreliable?...
09:21 Wed 21st Dec 20229 answers, last by barry1010 11:39 Wed 21st Dec 2022
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Rev. Green

Entropy Never Falls

Entropy does not fall, so what is wrong with the following: In a google years, most matter, black holes etc. will have evaporated and the Universe will 'soon' become a sea of photons. Although it is...
17:06 Tue 06th Dec 20224 answers, last by Old_Geezer 20:58 Tue 06th Dec 2022
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Rev. Green

Black Hole Squarks

When two black holes collide they emit a "squark" of gravitational waves. Why? There is conservation of mass, centre of mass, and angular momentum. I assume that tidal disturbance transfers angular...
21:27 Wed 09th Nov 202218 answers, last by Atheist 12:12 Thu 10th Nov 2022
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Rev. Green

No Gravity From Photons

A photon has energy. Why does it not generate a gravitational field? Energy = mass....
23:12 Tue 08th Nov 202247 answers, last by Zacs-Master 16:51 Fri 11th Nov 2022
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Rev. Green

Design Of The Universe

If you had designed the Universe, would you have designed this one?
09:24 Mon 29th Aug 202233 answers, last by topas 20:46 Wed 28th Sep 2022
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Rev. Green

Parasexual

We used to have just a few genders, then LGB, then LGBT. Recently, I heard something like LGBTQ+. Can't we have a word to describe all these conditions? How about 'parasexuals'?
11:41 Mon 25th Jul 202243 answers, last by Canary42 20:49 Tue 26th Jul 2022
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Rev. Green

Statistical Problem

If one of a group of n items is distinguishable, then it can be found in (n+1)/2 attempts, on average, by examining a random item from the group, provided that the same item is not chosen twice. How...
10:15 Mon 25th Jul 202221 answers, last by Peter Pedant 17:06 Tue 26th Jul 2022
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Rev. Green

Does Turbulence Keep Wind Turbines In Phase?

Yesterday, two wind turbines kept in phase for all the time that I watched them. Was turbulence locking their rotations together? One was directly downwind of the other. A third turbine, at the side...
20:41 Fri 22nd Apr 202212 answers, last by Peter Pedant 22:14 Fri 22nd Apr 2022
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Rev. Green

How Long Does The Severn Flow.

How long in time (not distance) does it take a river like the Severn to flow from its source to the sea? Of course, this is impossible to answer: some molecules will travel faster than others; some...
20:49 Wed 03rd Nov 202131 answers, last by Peter Pedant 10:48 Sun 14th Nov 2021
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Rev. Green

Polynomial?

I need a formula that monotonically decreases from f(0)=infinity to f(infinity)=0 and passes through the points f(a)=2 and f(b)=1, where a
15:18 Sun 31st Oct 202112 answers, last by jim360 22:27 Wed 03rd Nov 2021
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Rev. Green

Dual Focus

Is it possible to make a compound camera lens, perhaps using materials like Iceland Spar, which could simultaneously focus comparatively well on two objects, one near, one far, while leaving the...
17:07 Thu 13th May 20212 answers, last by Jonathan-Joe 08:18 Fri 14th May 2021

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