Aballoon is at a height of 81m and is ascending upwards with a velocity of 12m/s. a body of 2kg weight is dropped from it. if g=10m/s2, the body will reach the surface of the earth in how much time?

Water is siphoned from a large tank and discharges into the atmosphere through a 50-mm diameter tube. the end of the tube is b = 2.6 m below the tank bottom which is a = 6.7 m deep, and viscous effects are negligible. determine the maximum height h over which the water can be siphoned without cavitation occurring. atmospheric pressure is 101.4 kpa, and the water vapor pressure is 1.79 kpa (absolute). report your answer in meters to two decimal places.