A43-n crate is suspended from the left end of a plank. the plank weighs 21 n, but it is not uniform, so its center of gravity does not lie halfway between the two ends. the system is balanced by a support that is 0.30 m from the left end of the plank. how far to the right of the support is the plank

Consider two metallic rods mounted on insulated supports. one is neutral, the other positively charged. you bring the two rods close to each, but without contact, and briefly ground the the neutral rod by touching it with your hand. show answer correct answer what would be resulting charge (if any) on the initially neutral rod

What are atoms of the same element with varying number of neutrons

Why don't you see your reflection in water with waves or repples