Both trains start at exactly the same moment. At that same moment, a sparrow perched on the LA Star begins to fly ahead of that train at 75 miles per hour. The sparrow flies back and forth between the two trains, touching each train and returning to the other, until it is crushed at the moment when the two trains collide. How far does the sparrow travel before its untimely death. The sparrow flies for 60 hours at 75 mph or a total of 4500 hours.
Water flows into a tub at the rate of four gallons per minute.
And since the tub has net 40G in the beginning. It is Saturday evening and you arrive at a big party. Feeling shy, you wonder whether you already know anyone in the room. Your host proposes that you must certainly know Rose, the lady in the corner next to the dessert tray. In a fraction of a second you are able to cast a glance and verify that your host is correct.