A 5-gal, cylindrical open container with a bottom area of 120 square inches is filled with glycerin and rests on the floor of an elevator. a. Determine the fluid pressure at the bottom of the container when the elevator has an upward acceleration of 3 ft/s2 . b. What resultant force does the container exert on the floor of the elevator during this acceleration? The weight of the container is negligible. (1 gal=231 in.3 )

a)  68.9 b/ ft²

b)  57.416

Explanation:

Volume of the cylindrical open container V = 5 gal

= (5)(231)

= 11155 in³

different diagrammatic expression has been shown in the attached file below for clear understanding.

Area A = 120 in²

V = hA

    =

    =  9.625 in

Upward acceleration ,

= 68.9 b/ ft²

b) The flowchart for the resultant force is shown in the  diagram below:

with that:

Thus,  the resultant force that the container exert on the floor of the elevator during this acceleration = 57.416

it can be observed without changing the identity of the object.

it depends on what substance you're talking about as well as many other factors. in quantum mechanics, the observation of particles affects the observers ability to measure certain properties. for example: you can know the velocity of a particle, but you can't know it's position; or you can know it's position, but not it's velocity. it's like trying to find out where a grain of sand is by throwing other grains of sand at it. once you find out where it is, it's been moved. it's also like trying to find an answer to the question of whether or not a tree falling in a forest makes a sound if nobody is there to hear it. paradoxically, the only way to find out is to be there and hear it.