Acube with 45-cm-long sides is sitting on the bottom of an aquarium in which the water is one meter deep. (round your answers to the nearest whole number. use 9.8 m/s2 for the acceleration due to gravity. recall that the weight density of water is 1000 kg/m3.) (a) estimate the hydrostatic force on the top of the cube. (b) estimate the hydrostatic force on one of the sides of the cube.

1) Force on top face

2)Force on the side face

Explanation:

a)

We know that

Pressure shall be calculated at a depth of (1-0.45) meters from the top of the water surface

Thus force is calculated as under

b)

The force on one of it's sides is calculated in the same manner except that the pressure is obtained at the centroidal level of the face of cube

Thus

the bal will not change its velocity.

answer;

d. are made mostly of liquid

explanation;

-the general   composition and structure planets includes; they have a thick gas and liquid layer covering a small,solid core. mostly the gases are hydrogen and helium atmosphere and layers of liquid hydrogen. for instance neptune and uranus are examples of the outer planets, they have a core covered by ice and ammonia.

-neptune's atmosphere is hydrogen and helium with a bit of methane so there is no oxygen to breath and the interior is made up of frozen water and ammonia with a rock and iron core. thus, there is no liquid water or solid surface to survive.