If the moving wire and the rails have a combined total resistance of 1.55 Ω 1.55 Ω , what applied force F F would be required to keep the wire moving at the given velocity? Assume that there is no friction between the moving wire and the rails.

Ais on of a in a of r at v. by ofof b by a of ? 13.by a of .by a of .by a of .by a of . a) b) c) d)

List and describe three ways that humans can change ecosystems and three ways that humans can protect ecosystems.

An astronaut on the moon throws a baseball upward. the asatronaut is 6ft, 6in. tall, and the initial velocity of the ball is 30ft per second. the heigh s of the ball in feet is given by the equation s = -2.7^2 + 30t + 6.5, where t is the number of seconds after the ball was thrown. after how many seconds is the ball 16ft above the moon's surface?