Answer :
Final answer:
A pebble dropped in water creates a pulse wave, so the statement is true. High-voltage wires are not wrapped in insulating material because the air is an insulator, making the statement false. Not all Iroquois Confederacy tribes remained neutral during the Revolutionary War, so this statement is also false.
Explanation:
When considering the statement about a pebble dropped in water, it's important to clarify what is meant by a pulse wave. A pulse wave is a single disturbance that moves through a medium from one point to another. In the context of the pebble dropped in water, this action indeed creates a pulse wave which propagates outward from the point of impact. Therefore, the correct answer to this question is (b) True. Regarding high-voltage wires, the statement mentions they are held aloft by insulating connectors, which is correct.
