Explain what it means when we say that Earth’s oceans are in hydrostatic equilibrium. Now suppose you are a scuba diver. Would you expect the pressure to increase or decrease as you dive below the surface to a depth of 200 feet? Why?

Explanation:

Hydrostatics put simply means fluids at rest (hydro-fluid, static-rest)

Oceans are basically bodies of fluid (water),

and as such they are in hydrostatic equilibrium or hydrostatic balance when they are at rest, or when the velocity of flow in them are constant over a given time. Hydrostatic equilibrium usually occurs when external forces acting on the ocean bodies balance each other out. An example is the force of gravity being balanced by a pressure-gradient force.

The pressure felt by a body in a fluid (water) is given by the formula P = ρgh

Where ρ is the density of the fluid

g is acceleration due to gravity

h is the depth of the body in the fluid.

ρg is constant for water and as a result the pressure you will feel in an ocean will depend on how far below the surface you are, h. The lower inside the water you are the higher the pressure you feel.

russian is not my first language, so i'm afraid i can't write out an answer in russian, but hopefully you can find a way to do so. here's my best translation of the problem: you're given a plot of a particle's position in one-dimensional space over time, and you're asked to find either the total distance traveled by the particle after 6 seconds had elapsed, or the total displacement of the particle after 6 seconds.

if you want the total distance traveled, you would first need to determine the particle's velocity as a function of time, then integrate that over the 6-second interval. we know the position function is quadratic with roots at 0 and 6, so we have

where is unknown. because the position is parabolic, there is symmetry about the midpoint at , and we know that

so that the position function is

which means the velocity is

then the total distance traveled is

so the total distance traveled is 20 m.

on the other hand, if you want to find displacement: the particle starts at and ends at , so its displacement is 0.

1.195000

explanation:

total mass=0.0117+0.0137+0.0881+0.0111

total mass= 0.01172kg

total velocity = 0.283-0.743+0.871-0.799+0.155+0.637+0.301=0.102

momentum=mv=0.1172*0.102=1.195000//