Sleeping
Assuming that you mean 8:30 and not 8.30 (which is actually 8:18), there are (8.5 + 24k) hours, where k is any integer.
No,12 hours apart.2*12=24 there are 24 hours in one day.
If you mean 5/8 of an hour then it is 37.5 minutes
It is 8 hours.
Ah means Ampere hours. A 4 Ah battery can release 4 amps for one hour, or 1 amp for 4 hours, or 0.5 amps for 8 hours, or 8 amps for 0.5 hours.
Amp hours is a battery rating. It means that this battery can sustain 1 amp for 8 hours up to 8 amps for 1 hour. Depending on what the current draw is on the load will determine the length of time the battery will last.
7 or 8
40 amp
8 hours and one quarter of an hour. So that is 8 hours and 15 minutes.
It means the battery will operate a device for 8 hours before recharging is needed.
Sleeping
8 to 10 hours 8 to 10 hours 8 to 10 hours 8 to 10 hours 8 to 10 hours 8 to 10 hours 8 to 10 hours 8 to 10 hours 8 to 10 hours 8 to 10 hours 8 to 10 hours 8 to 10 hours 8 to 10 hours 8 to 10 hours 8 to 10 hours 8 to 10 hours 8 to 10 hours 8 to 10 hours
8 amp in all but #9 and #10 , they get 16 amp
It means they're happy 8 hours a day.
Not sure what you mean by "gas" rated wire. If you mean "gasoline resistant" you probably have type THHN wire insulation. Size #8 THHN is not suitable for a 60 amp application anywhere.
Assuming that you mean 8:30 and not 8.30 (which is actually 8:18), there are (8.5 + 24k) hours, where k is any integer.