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Rev. Green

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kaththisuresh

Can We See What's Inside A Blackhole By Doing This?

Theoretically,if we shine particles travelling faster than the speed of light on a black hole,can we see the singularity inside?
16:20 Sat 27th Mar 202122 answers, last by ToraToraTora 15:53 Tue 06th Apr 2021
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-Yasmin-

Is Gravity Really A Force?

As we all know, in school we are taught gravity IS a force. However, the truth is that according to the theory of general relativity gravity is NOT a force, rather a curvature in spacetime. Can...
15:30 Sun 04th Apr 202112 answers, last by davebro 11:09 Tue 06th Apr 2021
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Rev. Green

Is The Answer 42?

An infinite number of points A are placed at random on an infinitely long line. A second infinity of points B are also placed at random on the line. How many B's coincide with one or more A's on...
10:12 Sat 06th Jun 202083 answers, last by Rev. Green 21:22 Sun 07th Jun 2020
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Rev. Green

Why Not Syphon The Reservoir?

The high-power pumps can empty the reservoir in four months and consume large amounts of energy. A hundred pipes could empty it quicker and cost little.
07:34 Fri 02nd Aug 201939 answers, last by tamborine 11:57 Tue 06th Aug 2019
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Rev. Green

Extra Symbols?

Is anyone else irritated by not knowing in The Planets series which scenes are real and which are computer-generated. It would be easy to include an on-screen symbol to tell us which. Wildlife and...
08:26 Tue 11th Jun 201917 answers, last by tiggerblue10 20:02 Wed 12th Jun 2019
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vetuste_ennemi

The Planets: Dr Brian Cox

Just watched episode 1 (of five) covering the formation of the terrestrial planets. Nice stuff. If you hadn't clocked the series it's on BBC2 and available on IPlayer....
21:32 Thu 30th May 201912 answers, last by Rev. Green 08:17 Mon 10th Jun 2019
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Rev. Green

Efficient Swimming

Ducks fly in V-formation to save energy. When swimming, should the V be sharper or flatter? Does it depend on viscosity, or speed of sound in the medium, or both?
15:49 Sat 27th Apr 20196 answers, last by Mamyalynne 16:09 Sat 27th Apr 2019
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Peter Pedant

Easy Maff Question

ABCD is a trapesium with AB parallel to DC - the diagnonals meet at X - prove DXC and BXA are similar traingles and that area of DXC = DC2 ---------------- ------ araa of AXB AB2 Answer - the similar...
18:09 Thu 07th Feb 201921 answers, last by Rev. Green 16:36 Mon 18th Feb 2019
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Rev. Green

The Times Killer Sudoku 6398 Friday January 18Th 2019

Please tell me the third column to show where I keep going wrong.
09:37 Fri 25th Jan 20192 answers, last by Rev. Green 11:59 Fri 25th Jan 2019
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Rev. Green

How Do Black Holes Swallow Matter?

How do Black Holes swallow matter? They have high gravity, but almost every object that approaches them should go into orbit in the same way that almost everything in the Solar System orbits the Sun....
11:52 Fri 04th Jan 201924 answers, last by mibn2cweus 06:49 Thu 10th Jan 2019
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Rev. Green

When Does Income Become Savings?

If I receive income on Tuesday and give some to my son on Thursday, he never has to pay tax on it even if I die within seven years. If I wait twenty years to give it, it then becomes savings, and he...
09:44 Wed 26th Dec 201815 answers, last by sandrakbush 08:06 Wed 09th Jan 2019
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Bert45

Inflation Calculation

I'd like to know what £1000 20 years ago would be equivalent to today. I've been online, of course, but the calculators don't give me what I want to know. To be clear, what I want to know is the...
22:04 Tue 11th Dec 201829 answers, last by Peter Pedant 16:36 Sat 22nd Dec 2018
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lainiej

Savings Account Advice

My family has inherited a quite large sum of money from my late Mum. I'm thinking of putting it in a decent interest bank account until we are in a position to share it out. Any suggestions please?...
19:05 Wed 19th Dec 201819 answers, last by Tilly2 13:16 Thu 03rd Jan 2019
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Rev. Green

Isobar Spacing On Bbc Weather

What is the spacing of isobars on BBC Weather? Is it always the same? It seems about four millibars.
09:40 Thu 29th Nov 20187 answers, last by Rev. Green 19:54 Thu 29th Nov 2018
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bazzard

Swimming Pool Temperature

Mentioned to someone that the public swimming pool was cool. Was told by staff that it was cooler because lots of school children had just had a session in it. Is this scientifically correct?...
11:34 Thu 22nd Nov 201814 answers, last by sakshirathor12 08:03 Thu 20th Dec 2018
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18mbuck

I Put 2 Beakers On A Balance One Contained 20Cm Cubed Of Hydrochloric Acid 20Cm Cubed Of Sodium Hydroxide Solution. The Total Mass Was 163.5 She Poured The Acid Onto The Sodium Hydroxide .why Did The Reading On The Balance Not Change?

I put 2 beakers on a balance one contained 20cm cubed of hydrochloric acid 20cm cubed of sodium hydroxide solution. The total mass was 163.5 she poured the acid onto the sodium hydroxide .Why did the...
15:18 Thu 27th Sep 20187 answers, last by Rev. Green 15:18 Tue 09th Oct 2018
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Khandro

Expanding Universe

If the universe is expanding, which seems to be the case, what is it expanding in to?...
08:36 Sat 25th Aug 201861 answers, last by smartypants10101 04:24 Wed 12th Sep 2018
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Pattimac

what type of ray?

Short-wavelength electromagnetic radiation resulting from high-speed electrons striking a solid target
16:16 Mon 06th Jun 20052 answers, last by jim360 10:36 Tue 21st Aug 2018
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samj

wind direction

air moving eastward more slowly than the earth rotates would appear to an observer to be what kind of wind?
19:52 Tue 29th Mar 20051 answer, last by Rev. Green 09:59 Tue 21st Aug 2018
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scotthoather

science

what is the name of the type of energy stored in a cell?
20:42 Thu 20th Jan 20051 answer, last by Rev. Green 09:56 Tue 21st Aug 2018

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