2.69 A 0.3-m-diameter pipe is connected to a 0.02-m-diameter pipe. and both are rigidly held in place. Both pipes are horizontal with pistons at each end. If the space between the pistons is filled with water, what force will have to be applied to the larger piston so bal- ance a force of 90 N applied to the smaller piston? Neglect friction 2.70 A Bourdon gage (see Fig. 2.13 and Video V2.4) is of ten used to measure pressure. One way to calibrate this type gage is to use the arrangement shown in Fig. P2.70. The container is filled with a liquid and a weight, W, placed on one side with the gage on the other side. The weight acting on the liquid through a 0.4-in.-diameter opening creates a pressure that is transmitted to the gage. This arrangement, with a series of weights, can be used to determine what a change in the dial movement, e, in Fig. P2.706, corresponds to in terms of a change in pressure. For a particular gage, some data are given below. Based on a plot of these data, determine the relationship between 0 and the pressure, p, where p is measured in psi 2.00 3.23 14.05 15.24 W (lb) 10 1.04 (deg) 0 6.31 20 40 60 80 100 120 Bourdon gage 0.4-in diameter