They can be run in tandem. One's ability to use them simultaneously would be dependent on their balance and coordination, as well as their weight and the ability of those two pedals to support their weight.
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Yes, when it is needed. YOu can use any combination of strings, so using all 6 at the same time is just as common as using one string.
I'm pretty sure Angus just plugs right into his amp and doesn't use any pedals.
Angus uses the overdrive on his amp.
I know a least on most songs Padge uses the Boss Metal Core
Yes, as long as both are bass pedals. also known as kick drum pedals.
You wrote with two hands at the same time.
yes you can use accounts on two computer at same time.
Both Eddie and John don't use distortion pedals they use Big Bite pedals they are boost overdrive pedals. You can find them here, www.bigbitefx.com or www.facebook.com/bigbitefx
Use a flashlight
Yes, you can use two different serial devices at the same time.
Unfortunately no, for example Electro Harmonix pedals use special adapters and some pedals only operate on batteries. But it will power most 9V pedals.
yes you can
Pilots use two pedals on the floor to taxi after landing, the yoke is not used for steering
Tricycles use the same pedals as any other bicycle, so you should be able to pick up replacements from pretty much any bicycle store.Keep in mind though that there are two fairly common axle threads for pedals, so your safest bet is to bring one of the old pedals with you when you go to buy new ones.Pedals can be stuck on really hard, so remember that the left pedal unscrews clockwise.The right pedal unscrews counter-clockwise, like normal.
Airplanes do not have gas pedals. Instead they use a throttle lever which is hand operated. Some planes come with pedals that are used to operate the rudder or brakes.
There is not a seat on this Elliptical Trainer, just two foot pedals which you work while standing.