Apiston having a cross-sectional area of 0.07 m2 is located in a cylinder containing water as shown in fig. p2.73. an open u-tube manometer is connected to the cylinder as shown. for h1 60 mm and h 100 mm, what is the value of the applied force, p, acting on the piston? the weight of the piston is negligible.

Unpolarized light of intensity i_0=750w/m^2 is incident upon two polarizers. after passing through both polarizers the intensity is i_2=280w/m^2. (a) what is the intensity of the light after it passes through the first polarizer in w/m^2? (b) write an equation for the angle between the polarizers in terms of the initial (i_0) and final (i_2) intensities. (c) find the angle between the polarizers in degrees.

The ratio of lift to drag l/d for a wing or airfoil is an important aerodynamic parameter, indeed, it is a direct measure of the aerodynamic efficiency of the wing. if a wing is pitched through a range of angle of attack, l/d first increases, then goes through a maximum, and then decreases. consider an infinite wing with an naca 2412 airfoil. estimate the maximum value of l/d. assume that the reynolds number is 9x10^6.

The diagram shows four locations in the electric field of a positive point charge m. at which location is the electric potential the greatest.