The lee family has installed energy efficient appliances and lightbulbs in their home. what effect can they expect to see? a change in the neighborhood temperature increased water usage to offset the decreased electrical usage a change in their comfort levels at home a lower power bill as a result of using less electricity
ps the answer is d) a lower power bill as a result of using less electricity

When a charged balloon sticks to a wall, the downward gravitational force is balanced by an upward static friction force. the normal force is provided by the electrical attraction between the charged balloon and the equal but oppositely charged polarization induced in the wall's molecules. if the mass of a balloon is 1.2 g, its coefficient of static friction with the wall is 0.71, and the average distance between the opposite charges is 0.80 mm, what minimum amount of charge must be placed on the balloon in order for it to stick to the wall? express your answer to two significant figures and include appropriate units.