Alfred, you are doing a marvellous job in maintaining this new forum. Thanks.

Reverting to problems with the forum facilities, is there any possibility of adding "delete/restore last change" features? Desirable, if not actually definitely required.

Suzi would look the same under the same lighting and distance. She's a medium sized beauty, weighs in at  about 4.4kg. Very affectionate.

If you are sufficiently interested to do some research, William, try asking the web.
Ask: how fast would a wheel have to spin to get earth gravity.

There are several interesting links found.

One is Wikpedia,
https://en.wikipedia.org/wiki/Rotating_ … ce_station

and another is :
https://space.stackexchange.com/questio … -gravity-f

EDIT. Both links are worth reading if you're really interested in the topic. 

There is actually a spin calculator reference in the latter.
http://www.artificial-gravity.com/sw/SpinCalc/

EDIT: (Alfred  found  spin calc and the answer while I was writing this post, and having lunch.)

To answer the question, the formula appears to be : a = ω²r,
and using the spin calculator, to achieve 1 g at a diameter of 100 m, the wheel needs to spin at 4.23 rotations / minute.
(Agrees with my finding)

Bear in mind that if the 100m  (radius 50m) is the floor, the outer rim of the " toroidal cabin" of the wheel, and if the astronaut has a height of say 2m, his head will be in a region of gravity at 0.96 g, in other words, lower by 4%.

If the spaceship  was in the form of a spinning cylinder rather than a wheel, and if the floor was the cylindrical skin, say 3m from the long axis, to get the mid height, say 1m of the astronaut at 1g, his feet would be at a increased gravity, and his head much decreased. The three values would be :
at his  midriff radius of 2m,  1g, the spin rate would be 21.15 revs/minute ,
then, at his feet,  radius 3m, gravity would be 1.5 g,
and at  his head, 3.8m, 0.5g

If he had to bend down to pick up something from the floor, and had to get his head near the floor, his head would experience a gravity change of 0.5 to 1.5, or 1 g. Very disorientating. This is why a wheel is the best shape to minimise this effect. harder to launch, it would have to be assembled in space. One of the refs, Wiki?, discusses this problem.

Please check these figures, I took them from the spin calculator in ref 2

Remember that for a constant spin, the gravity value is directly proportional to the radius.

How about "Interesting science and maths"

Another, [ibid]

A man walks into his favorite restaurant…
He sits down and orders a medium rare ribeye steak. As he’s eating, he looks up and sees a woman giving him a dirty look. The man assumes the woman is a vegetarian since she is only eating a large bowl of salad and greens.
The man tries to ignore her but after a few uncomfortable minutes he puts down his fork and turns to her.

“What!?” He asks indignantly.
She says: “Do you know a cow died so you could have that steak?” .
The man looks down at her plate and then back at her, and replies: “I know a cow died. Because you ate all his food!”

Crime latest! Mentally challenged man enters garden, and assaults lady hanging out the laundry, then flees!

Unwoke junior editor on local paper, short on headline space, puts:
"Nut screws washer and bolts."

If this is too strong for this forum, moderator delete it.

Man walks into a bar in Oz, and says: "Give me a koala."
The barman says: "Mate, don't you mean a Cola?"
"No," the man replies, "life is hard at the moment, and I can only just bear it!"

Another original, just composed by me.

You Don’t Look Jewish
A woman on a train walked up to a man across the table. “Excuse me,” she said, “but are you Jewish?”
“No,” replied the man.
A few minutes later the woman returned. “Excuse me,” she said again, “are you sure you’re not Jewish?”
“I’m sure,” said the man.
But the woman was not convinced, and a few minutes later she approached him a third time. “Are you absolutely sure you’re not Jewish?” she asked.
“All right, all right,” the man said. “You win. I’m Jewish.”
“That’s funny,” said the woman.” You don’t look Jewish.”

Revised joke:
It was:

An original, mine, just now.

I've expanded a bit, to give it more "meat!"

The pub landlady bought an old brass oil lamp in a junk shop.
She got busy with the Brasso and a soft cloth, and was amazed when a genii materialised from the spout.
"Gosh," she exclaimed, being a posh lady, "how did you fit in there?"
"Ah, said the genii " I had to get rid of all my corporeal water."
The landlady said: "I suppose you must be very thirsty."
The landlord came in at this moment, and seeing the genii exclaimed "I have drink named after you."
"What's that?" asked the genii.
"Oh," said the landlord, "a dry djinn!"

Lady, to waiter: "My meal tastes like old boots!"

Waiter: "But Madam, you ordered Beef Wellington!"

From today's Daily Mail, Peterborough column, contrib. Andrew Parton

That's sad. People are all different in what upsets them. You certainly are entitled personally to feel unhappy when you need to discuss things with their proper names with a doctor or nurse. But, I feel that it indicates that your judgement re gentility is of diminished value.

Nurses and doctors are well hardened concerning body parts and their derangements. Do you think a doctor who closes up deep and bloody wounds, or cuts out bowel cancers,  is upset by your need to say fecal matter or stools rather than - oh, sorry, I can't even think of a euphemistic synonym. Perhaps "I went twice yesterday." Where? To the paper-shop?

I am talking about real life, and not what could be said as a matter of course in these posts.

A genii walks into a pub, and declares he is very thirsty.
The barman says "There's a drink named after you."
The genii says "What's that, then?
The barman says "A dry djinn"

An original, mine, just now.