Two fixed navigation beacons mark the approach lane to a star. the beacons are in line with the star and are 40 mm apart. a spaceship approaches the star with a relative velocity of 0.30 c and passes the beacons. the passage of the ship between the beacons is timed by observers on the beacons. the time interval of the passage is closest to:

Steelhead trout migrate up stream to spawn.occasionally they need to leap up small waterfalls to continue their journey. fortunately, steelhead are remarkable jumpers, capable of leaving the water at a speed of 8.0 m/s. a. what is the maximum height a steelhead trout can jump? b.leaving the water at 8.0 m/s, the trout lands on top of the water fall 1.8 m high. how long was it in the air?