woolyhead

Yes, I see. My C cells are from a cheap electric drill so I suppose they would be the cheapest variety of cell. If they are, then with them simply connected in series, would the end cell sometimes fail, other than with chance failures of course? When my end cell failed I wondered whether the battery voltage overall had maybe risen to the off load voltage of the charger because several cells had each produced more that 1.35 volts so that there was insufficient voltage push left to charge the rest of the cells any more and that because of this the end cell failed to get a full charge. But that doesn't explain why it's always the end cell that suffers. Unless you know different, maybe? I just calculated that since there are 12 cells in the battery, if 11 of them happened to have an on-charge voltage of 1.636 volts then in series they would give18 volts. This is the off load charger voltage. Is it possible that when on charge these cells could generate 1.636 volts each? I know the nominal fully charged value is 1.35 volts for a new cell but that isn't the on-charge voltage. Or is it? The cells are quite old, ie about fifteen years. So does my theory hold water or not?

Thanks Ghozer. I think I understand what you're telling me. But I would have thought the discharge could take place into any of the cells in the loop, not necessarily the first or last one, couldn't it?

when cells in an electric battery are charged, sometimes the end cell in the string of cells fails. Why is it the end cell and not one from somewhere else in the cell chain? I have experienced this several times in my life and I've just had it happen again, this time with CdS cells. Why the end cell?

Thanks both. What Google told me was something about a settlement pond and a special type of valve. I didn't read either things for obvious reasons. Just as well I didn't use it as a glue or a filler!

Wen raking through all the bottles and tins of liquids in my shed I discovered that I had quite a lot of something labelled RP7. It has virtually no smell, is a white coloured thick liquid which separates into the white base and a brown, thinner liquid which floats to the top, after standing for a couple of hours. I couldn't find it on Google so I tried experimenting with it to see if it was either a glue or a filler or a paint. I painted it onto the rough edge of a piece if chipboard and it soaked into the shipboard and felt slightly sticky as it did so but I still cannot find out what it is or what it's for. It did not set hard and you wouldn't even know it was on the chipboard after it soaked in. Can anyone help me please?

Thanks Alarmingmark and Ghozer. That's good to know. I know something about the other variables but wasn't sure about this one. It affects which monitor I'm about to buy.

Is a speed of 1mS of any advantage over a speed of 5mS in a computer monitor that's used for general online work?

Thanks everyone.

Once again thanks everyone. You've been very helpful

Thanks for your replies guys. I have vga on the laptop, vga plus hdm1 on each of the two desktop PCs. I was thinking of getting the Acer KA270H 27 inch monitor but I'm also interested in the 24 inch Viewsonic VX 2458-MHD. The latter monitor has speakers and the former doesn't . My eventual choice doesn't depend on speakers though. The Acer has many excellent customer reports but the Viewsonic has none so far. Both monitors have both VGA and HDM1. What should I do, wait and see if the Viewsonic gets customer reports? Or ask you to decide for me, kind sirs? The 27 incher's price is 140 quid and the 24 incher's price is114 and it has a 1mS response time. What does this fast response time do for me?

Thanks for your replies guys. Firstly I do not want to spy on anyone, however suspicious my question may sound. I own all 3 computers and noone else uses them and I have no plans to change this. My question was based on just idle curiosity really and I haven't yet defined my purpose in having all 3 computers running with only one keyboard and mouse and monitor. Team Viewer and KVM switch sound useful in case I ever decide to go ahead. My last question is this can the 3 computers each connect to different online addresses at the same time? Thanks again. Terry

Hi Apelike. I suppose I might use it for all three things you ask about but for now it's for general browsing so my answer is I want it for everything if that's possible. I've seen screen response times as low as 1 mSec. What happens to the images if the screen is too slow? What images are these, gaming images that need a fast screen perhaps?

What happens if you do start the engine with petrol in the tank rather than diesel? Does it blow up or something?

I have a question for the computer boys and if I knew where the computer forum had moved to I would ask it there, but I don't. So let me ask it here, please. Someone might know the answer. I have seen reference to an office computer hookup whereby the boss can look on his own screen and see what every one of his staff are up to on their computer. I have 3 computers and only one monitor and no staff but would I be able to use all these computers at the same time but independent of oneanother and yet see what's going on with every computer during searches, or conversations or purchasing deals etc on the one screen by switching it to the appropriate computer? What is such a system called?

I need a new monitor for my pc and I fancy either a 27 inch one or a 24 inch. Does anyone have a suggestion about which make and model to go for?

Nor me

The number of new cars sold last month was a mere 1000, according to The Mail. Even if they aren't quite accurate, what are the chances for driving schools getting going soon after the lockdown?

Can you prove that YOU exist?

A few nights ago we looked out at the moon and it had a blue halo around it. And the moon wasn't pink or anything like pink. Did anyone else see the halo? What could have caused it?

Although I would agree in principle that footballers should take a pay cut there is a problem with their contracts. So far as I know, having heard about this on the radio this morning, if they accept less than what their contract says, it alters their status as employees with their club in a way that harms them to a degree much greater than just the pay cut would hurt them.

That sounds dangerous! I know the actual correcting of DNA is guided by a synthetic RNA strand and implemented by a Cas 9 bacterium. Finding your own DNA is done quite a lot nowadays and because it only involves taking saliva and placing it in an analyser it seems like quite an innocuous thing to do to yourself. But making the right synthetic RNA, called gRNA, seems to me to be very problematic. You would need to know which piece of the DNA you wanted to change and what to change it into. Changing it sounds simple … you just inject Cas 9 and that does the job for you. But it can't really be that simple of course. And the next question is how many of these gRNA strands are needed? None of the videos I've seen on the whole subject so far tell us this degree of detail. Maybe this is just part of what these DIY experimenters are doing?

Yes, as you say, extremely touchy. There are commercial businesses who say they can correct faulty human genes so I tried to get the answer from one of them but they didn't reply to my e mail. I think they wanted to first find out if I was genuine and then no doubt get hold of my bank details. Dominic Lawson of the daily Mail wrote a column on Feb 24th about the subject from the viewpoint of the strong anti-lobby.

Thank you Carol. The article you gave does indeed explain what CRISPA is and roughly how it works but I am interested in finding out how many pieces of gRNA it takes typically to correct a genetic fault. The reference doesn't tell us. The number of cells in a body is arguably around 30 trillion (3 x 10 exp 13) and, the cells altogether contain 200 germlines. So each genetic fault (one germline per fault) will contain either more of less than round about (3 x 10 exp 13)/ 200 identical pieces of faulty DNA. So if one dose of correcting gRNA is injected into someone it would have to contain an awful lot of correcting gRNA. I'm trying to find out approximately (ball park) how much is necessary for correcting any given genetic fault, say for e.g. sickle cell anaemia. Does anyone on this forum know or could you please find out for me?

I live in a small town outside the main centre and someone has painted NO PARKING, INVALID on the pavement outside his house and then parked his car on that space! I've seen him getting out of his car and I can tell from his lively gait that he's no invalid. But the house is on a dangerous bend in the narrow, two way road where drivers cannot see round the corner easily, so is he justified?

Has anyone heard of the CRISPA method of targeted gene manipulation? Leaving aside the ethical discussions, there is something else that I would like to know. The human body contains some 30 trillion (3 x 10 exp13) cells and there are some 200 germ lines. So how much gRNA is needed to correct all the faulty DNA bases?