Hey Everyone! Can yall help!! As the pressure of an enclosed gas decreases to half its original value, what happens to the volume of the gas if temperature is held constant?

A. The volume decreases to one-fourth of its original value.
B. The volume increases to four times its original value.
C. The volume decreases to half of its original value.
D. The volume increases to twice its original value.

The free body diagram shows a box being pulled to the left up a 25-degree incline. the magnitude of the normal force is

Within a pendulum, as potential energy decreases, energy increases. a. heat b. kinetic c. frictional d. gravitational

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.