Volume Calculation: Fluid into a box

How many fluid mls would fit into a box measuring 3626mm in lenth, 1875mm in width and 1216mm in height?

Mass Balance Problem

This problem is vague and hard to understand. Any help would be appreciated. Thanks.

Show a velocity expression satisfies the partial differential equation (given)

Thank you in advance for your help in solving this problem. See attached problem statement.

Calculating drag coeffecients around a falling sphere.

Thank you for taking the time to look at this problem. I am having difficulties with all aspects of this problem and i need to learn the proper solution method. Thank you. Please see attached problem statement.

Boundary Conditions

In solving transport phenomena problems, we use "boundary conditions" and "initial conditions". In mathematical terms, (that is, types of variables), what are "boundary conditions" and what are "initial conditions"