Let's look at the surface tension of the liquid metal mercury. Mercury has an unusually high surface tension, about 465 dyn/cm. Calculate the excess pressure inside a drop of mercury 4.00 mm in diameter. What would the diameter of the drop be if the inside pressure were 5 atm?
Express your answer in millimeters to three significant figures.

1. explain how you calculate the net force in any direction on the box. 2. suppose an upward force of 15n is added to the box. what will be the net vertical force on the box? 3. what force could be applied to the box to make the net force in the horizontal direction zero? explain. 4. suppose a force of 25n to the right is added to the box. what will be the net force to the right?