Derive the expression for the pressure exerted by the gas on the seal as a function of pressure Pa of the outside air, the force F exerted by Earth on the water, the area A of the water seal, and angle θ . Note that surface tension keeps the water-gas interfaces essentially perpendicular to the tube. Express your answer in terms of the variables Pa , F, A, and θ.

i don't understand is there any other way you can rephrase it plz let me know in the comments and i will do it.

explanation:

the duration of a photographic flash is related to an rc time constant, which is 0.100 μs for a certain camera.

air exerts forces on falling objects near earth’s surface.

explanation:

the term 'free falls' refer to object that are falling towards the earth, in a situation in which gravity is the only force acting on the object.

for an object in free fall, the acceleration is constant (g, the gravitational acceleration), and so the velocity of the object constantly increases.

for objects near earth's surface, there is always another force acting on the object: the resistance due to the air. this force is opposed to the direction of fall of the object, and it is proportional to the velocity of the object, so as the object falls down, this force increases up to a point when it balances the force of gravity, and the object continues its motion at constant velocity (called terminal velocity). since in this case gravity is not the only force acting on the object, we are not in a situation of free fall.

where is the