The electronics aboard a certain sailboat consume 50 w when operated from a 12.6-v source. if a certain fully charged deep-cycle lead acid storage battery is rated for 12.6 v and 100 ampere hours, for how many hours can the electronics be operated from the battery without recharging?

The power (in watt) is defined as the multiplication of the voltage and the current

Then, the current equals

Because the certain fully charged deep-cycle lead acid storage battery is rated for 12.6 v and 100 ampere hours (the same voltage)

so, the time which the electronics can be operated from the battery without recharging =

in simple terms, the principle states that the buoyancy force on an object is equal to the weight of the fluid displaced by the object, or the density of the fluid multiplied by the submerged volume times the gravitational acceleration, g. this is also known as upthrust.

mass and volume are the answers you are looking for