The equation shown is used to calculate moments. The value d is the perpendicular distance from the to the force's line of action. What one word completes the sentence?

In a voltaic cell, electrons flow from the (positive/negative) to the (positive/negative) terminal.

What structural formula represents 4 electrons shared between two atoms?

Contrast the force of gravity between these pairs of objects: 1-kg mass and a 2-kg mass that are 1 m apart; a 1-kg mass and a 2-kg mass that are 2 m apart; and two 2=kg masses that are 1 m apart. i dont understand.