A train on a straight track traveled 100.0 km East for 2 hrs., stopped for 15 min, then traveled 60.0 km west for 45 mins. Find the train’s velocity. Use a km/hr unit.

Are the earth's ocean floor and continents the same age geologically? why or why not?

Which characteristic should describe all evidence collected by a scientist? true obvious objective subjective

Which of the following would most directly interfere with sperm production? ingestion of a substance that mimicked inhibin interruption of sustentocytes' production of abp low sperm count use of synthetic steroids (testosterone)