Two charged objects originally felt 12N of attraction. One charge is changed from 3C to 6C and their distance changes from 15cm
apart to 45cm apart. What is the new force of attraction?

An uplifted block of rock between two normal faults

What is the rate of change in a objects position?

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 = 2.1 m below the tank bottom which is a = 7.4 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)