What are the highest points on a standing wave called

From center station, a train departs every 30 minutes on the fast line and a train departs every 50 minutes on the state line. if two trains depart from center station at 8: 00 a.m., one on each of the two lines, what is the next time that two trains, one on each line, will depart at the same time?

According to newtons universal law of gravitation, which would change the parh of the ball so it traces out widest curved path possible?

Holes drilled several kilometers into earth’s crust provide direct evidence about earth’s interior in the form of