Recent content by sophiecentaur

i thought that the favourite for quick start power sources was gas turbines. They are fast start and highly efficient. But there are so many proposed systems and very few successful ones. To be successful you need to be (or own) a "very good Engineer" who can analyse the specific situation and...

Problem is that low frequency sounds will diffract around any wall - however heavy. There are two solutions here. You have to enclose either your neighbour or yourself in a continuous wall in a massive box. You could buy some good noise cancelling earphones - several times the price of...

Sorry but that is naive as a general statement. Given time, even a coarse ADC will produce a bias at zero crossover which the statistics of the noise will reveal when analysed. But we do not know what the actual magnetic data values are so we can't tell how low we are in the likely error rate...

Remember, there's no such thing as suck so a very deep vacuum will impose very little extra stress on the chamber than for a moderate one. Leakage will increase pro rata but the chamber walls should have been mad with plenty of strength in hand. if a vacuum chamber implodes then someone should...

That was my initial reaction, too. However, the speed of sound in water would be too high to dominate the frequency of the 'ding'. As far as I can see, the relevant resonance is due to the lateral vibrations in the thin glass cylinder and a bulk effect of the mass of the glass and its...

You would need to look at the minutes of the regular NASA progress meetings. Choices will have been made throughout the mission about which experiments are performing best at the time; which ones to switch off ….

There is actually no such point. Variations of received data can be analysed ad infinitem and the signalling bandwidth is reduced further and further. I just takes longer. Neither you nor I know where Voyager is in this deterioration signal to noise ratio progress.

That guy just doesn't count here. 'He' is protected by the experts who recognise when something is interesting in their terms and use it responsibly. Watch out for the commercials though.

They can't but each disaster corresponds to relevant data. The Hindenberg, on its own, put the mockers on H filled airships. This bridge disaster could have been much worse, but for the actions of the road traffic controllers. As a spectacle, it certainly did the job of putting a huge dot on...

How 'small' a reading would be irrelevant? There are no 'zeros' out there and every value of every variable has its place. Our lives on Earth are governed by many variables and we are familiar with some (like g and the solar constant) but the variables in most of outer space have much lower...

I seem to remember using the COMMON command. That sets aside common memory which each subroutine or function writes and reads. IIRC, it's a blank, unformatted area of memory and the variables need to be defined carefully so the routines all know which location is which.

How would you envisage measuring the value ξ in diagram b? You'd have to put the probes 'somewhere' in amongst the electrolyte and electrodes. emf is a value of potential difference when no current.is being taken. Internal resistance is just a mental construct which gives a value to the amount...

It really puts things into scale when you compare that'enormous distance' with the nearest star, that's four light years distant It's hard to 'justify' a decision about the experiments on a mission that was launched all those years ago. I imagine there were dozens of groups who wanted a ride...

Radar systems produce beams which are usually wider than the targets they are observing; By using wide reflectors (narrow beam width), the directional accuracy can be improved but you may not even find the target at all if the beam is too narrow. Imagine a searchlight beam, sweeping the sky. It...

It's not really like that. The colour burst signal is the reference for the phase (and amplitude, btw) of the solour subcarrier in that line - it's all within the signal from each source. The timing equalisation you refer to is necessary because the colour burst on all incoming signals needs to...