A mountain climber stands at the top of a 45.0 m cliff that overhangs a calm pool of water. She throws two stones vertically downward 1.00 s apart and observes that they cause a single splash. The first stone had an initial velocity of -1.60 m/s. (a) How long aer release of the first stone did the two stones hit the water? (Round your answer to at least two decimal places.) E s (b) What initial velocity must the second stone have had, given that they hit the water simultaneously? E m (c) What was the velocity of each stone at the instant it hit the water? second stone E m/s