Suppose two students grab an end of a rope. Both shake the rope once, but one makes a crest and the other a trough traveling at each other. What would
you see when the crest and trough meet? What type of interference does this show?

The density of the block of iron is lees than the density of mercury but the density of the block of iron is greater than the density of water

Following the american gauge wire standards ,the larger gauge number, the slimmer the wire and thus the smaller current carrying capacity it can have.then both statements would be incorrect, as they are saying the opposite of what it is actually is.(smaller gauge numbers have thicker wires and can carry more current)

11m per