Let's break down and analyze the two problems from the image you've shared:

Câu 1:

This question appears to be related to fluid mechanics and the flow in a system with an inclined plane. It mentions determining the flow velocity (V) at a certain point, with equations for height differences (h), velocity (V), and possibly fluid properties (density, viscosity, etc.).

The most likely approach involves using Bernoulli’s equation or the energy balance for flow along an inclined plane, where the pressure difference, velocity, and gravitational potential energy will all be related.

You’ll need to provide specific equations and values for the variables, such as the height of the incline, the pipe diameter, and the velocity at the point (which could involve calculating based on the continuity equation or energy balance).

Let’s go step-by-step in terms of specific formulas, but for this, more specific data will be needed to proceed with exact calculations.

Câu 2:

This problem seems to deal with the flow through different pipes. There are three pipes involved (Pipe 1, Pipe 2, Pipe 3), and the goal is to find the flow rate or velocity for each of these pipes.

The flow rates are likely related through the principle of conservation of mass or the equation for flow through a pipe (e.g., using the Hazen-Williams equation or Darcy-Weisbach equation for pressure loss). Given the diameters of the pipes and the total flow rate, you can calculate the flow velocity using the continuity equation:

$Q = V \cdot A$

Where:

• $Q$ is the flow rate (m³/s),
• $V$ is the velocity (m/s),
• $A$ is the cross-sectional area of the pipe ($A = \pi \cdot r^2$).

The next step will involve determining the velocities $V_1, V_2, V_3$ for each of the pipes based on the given data.

If you can provide the numerical data for the systems (such as diameters, heights, or specific flow rates), I can assist further in calculating the answers.

Do you want to proceed with the detailed calculations, or do you have specific values that need clarification?

Related Questions:

1. What equations are commonly used to analyze fluid flow in pipes?
2. How does the Bernoulli equation apply to flow along an inclined plane?
3. What is the significance of using the continuity equation in fluid mechanics?
4. How do pipe diameter and flow rate relate in pipe systems?
5. Can you explain the Hazen-Williams equation and its use in calculating pressure losses in pipes?

Tip: Always start by writing down known values and clearly labeling them before applying the equations. This will make it easier to spot any missing information.