The image you provided includes a series of questions and a diagram involving a mechanical system. Here's an outline of the content in the image:

1. Question 1:

   • Given data: A system's radius is approximately $55 \, \text{cm}$ and the weight of the Earth is approximately $6.68 \times 10^{24} \, \text{kg}$. The question is asking for the mass (in kg) of a specific object based on the given values.

2. Question 2:

   • The volume is expressed in liters, and a specific relation (relative to water) is given. It asks how much the volume would be in terms of kilograms, likely related to a substance with a certain density.

3. Question 3:

   • A mechanical setup involving a machine for fluid dynamics is presented. A comparison of the densities of two fluids is involved, asking for a relation between their respective densities and another variable in the system.

The question is written in Persian (Farsi), and based on your provided details, I'll help you with the mathematics and physics involved. Would you like to solve these questions in detail step by step? Let me know which part you'd like to start with or if you'd prefer an overall breakdown of the problem.

Also, here are 5 relevant follow-up questions:

1. How do you calculate the density of an object given its mass and volume?
2. What is the formula for gravitational force?
3. How is the weight of an object related to its mass?
4. What does the term "specific gravity" refer to?
5. How do you calculate the buoyant force acting on an object submerged in a fluid?

Tip: When dealing with systems involving fluids and densities, always ensure that you have consistent units for mass, volume, and density to avoid errors.