A pebble dropped from a bridge strikes the water in exactly 4 seconds. How high is the bridge.

gans

explanation:

vestigial organs (like your appendix) are organs that no longer serve a purpose.

the arctic is a region of the planet, north of the arctic circle, and includes the arctic ocean, greenland, baffin island, other smaller northern islands, and the far northern parts of europe, russia (siberia), alaska and canada.

the five characteristics of adolescence are biological growth and development, and undefined status, increased decision making, increased pressure and the search of self.