B. A 50g fish swimming in a fish tank.
Molecules in a gas move faster than in a liquid.
hope it helps.
Answer:
The algebraic equation is:

Explanation:
Given information:
mb = book's mass
vb = tangential speed
R = radius of the path
Question: Derive an algebraic equation for the vertical force, Fv = ?
To derive the equation, we need to draw a force diagram for this case, please, see the attached diagram. As you can see, there are three types of forces acting on the system. Two up and one of the weight acting down. Therefore, the algebraic equation is as follows:

The variables were defined above and g is the gravity.
Answer:
The pressure at this point is 0.875 mPa
Explanation:
Given that,
Flow energy = 124 L/min
Boundary to system P= 108.5 kJ/min

We need to calculate the pressure at this point
Using formula of pressure


Here, 
Where, v = velocity
Put the value into the formula




Hence, The pressure at this point is 0.875 mPa