Recent content by synch

Yes , the regular contraceptive pill

I gather that one of the drugs often used in the Pill is an estrogen with an added ethinyl group. From memory, drugs with ethinyl groups were typically designed to attach/react chemically to the receptor, as opposed to the usual simple reversible binding. Does that mean that over a decade or so...

In newton, if there is a hole in one of the slabs and the test mass moves through the hole so that it is outside the slabs, the field (as determined by observed effect on the test mass) goes to normal from nothing. Generically overall I am wondering if the concept of "force" is a human...

Thank you for all your replies, I am reading them with great interest ! De-learning Newton is painful :( ... :)

There is a classic electrostatic example of two slabs of opposite charge in parallel, and the electric field and so on. I am wondering about the gravitational analogue with two equal slabs of mass. The intuitive view to me, is/was that there will be a gravitational field between the two slabs...

There is a concern about kids access to social media and so on, and some countries are banning access under 16. Would it be realistic to add kids country-level domains and then use devices locked to that type of access ? Eg Australia uses ".au", that could be supplemented by something like...

I think that it would polymerise and further react as soon as it condensed into liquid or solid, it may fleetingly exist as small concentrations in space at low temperatures

The volume is the significant factor, not the weight. The CH4 burns to CO2 or CO (same volume as the methane), and H20 (probably condenses at the pressures/temperatures underground).

IIRC it is possible to burn using a oxygen-in-fuel system instead of the usual fuel-in-oxygen. I wonder if the oxygen resulting from water hydrolysis can be burned in the natural gas down a gas well ? The CO2 would then be left in-situ down the tube, the combustion could run the generator to...

Brilliant ! Thanks, exactly on the spot. I see the READ has a transfer of control option, for EOF or errors. My initial programs were on a 6700, I enjoyed it. As a pastime decades later I have written an interpreter, which has forced me to understand programming languages in quite more depth...

I think it was Fortran 66 on a Burroughs 6700 but I don't have a reference mentioning exit at this stage, it may be a vendor extension. Generic references include it in f77 and later. Eg an EOF(n) function that would check for an end of file condition reached on unit n. So that was checked...

[ Historical program question - I am not asking advice about current versions ] About reading a file with an arbitrary number of records in say Fortran 66 : Typically a DO loop was used to repeat a READ statement. There was an option in a READ statement eg END = nnn, with nnn being the...

I wonder what happens when a very thin gas is combined with a more usual gas like ethane, I guess the viscosity tends to default towards the more viscous gas ? [small correction to my post - ethane or ethylene can be from bioethanol, hydrogen itself can be from the source sugar/biomass used for...

Decades ago, our domestic gas supply was changed from coal gas to natural gas, and I watched on as our kitchen oven had different jets fitted. As coal gas had a large fraction of hydrogen, obviously the pipes etc in use at the time were ok with hydrogen. Now the times have changed and there...

Always good to see a demonstration of physics !!