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

answer: at 24 february, 2014 the population gets twice of its initial population.

explanation:

since we have given that

the population for alpha city, t years after january 1, 2004 is given as

first we find out the initial population, i.e. t=0,

so, our quadratic equation becomes,

according to question, we have said that if the population has twice its initial population, then it becomes

so, time taken to reach this above mentioned population is given by

now, we know that time can't be negative so, we take t=9.149 years.

hence, at 24 february, 2014 the population gets twice of its initial population.

the displacement produced by the body.  

the amount of force subjected to the body.  

the angle between the direction of force and displacement