Some of them actually come on boats, right? Surely not all of the back and forth can be done with helicoptersI only really know what I've seen in photos of them, and occasionally shots in movies of people on them that aren't panoramic so you can't see where on the thing they are, but as far as I know oil rigs are up on stilts without any platforms at water levelSo where do the boats dock? Is the dock just so small that it doesn't show up in the pictures? Is it in one of the stilts? Is the rig only accessible to big ships and not boats?
To solve this problem, you need to use an equation called Faraday's law of electrolysis: I t n F where I current in amps, t time in seconds, n moles of electrons transferred, and F Faraday's constant Since you want time, solve the equation for t: t (n F) / I To figure out n, first figure out the moles of aluminum metal you have by dividing the mass by the atomic weight: 15 g / 26.98 g/mol 0.5560 mol Al Now, since the aluminum's charge is changing from 0 to +3, you need three moles of electron per mole of aluminum, so multiply the moles of aluminum by 3 to get moles of electrons n 0.5560 mol Al 3 1.668 mol electrons F, Faraday's constant, has the value 96540 coulombs/molI is the current, so that would be I 10 amps Now plug it all in: t (n F) / I (1.668 mol electrons 96540 coulombs/mol) / 10 amps 16102 seconds The answer comes out in seconds (because 1 amp 1 coulomb/second), so to convert to hours divide by 60 to convert to minutes and then by 60 again to convert to seconds 16102 seconds / 60 268.4 minutes 268.4 minutes / 60 4.473 hours And there's your answer, about 4.5 hours.
For people they use a crane and a safety ring with a safety netThe ring is lowered to the boat deckYou step onto the ring and grasp the safety netThe crane then lifts you up to the rig deckThey use this method because the wave action makes other methods difficultThere are newer systems such as the one shown in the link below that is saferBecause of costs most rigs far from shore use choppers with boats being used for rigs close to shore.
