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Three capillary tubes A, B, and C of different diameters are depicted. If all of them are partially immersed in water:

a) Which has greater capillary rise?
- A) Tube A
- B) Tube B
- C) Tube C
- D) All tubes have the same capillary rise.

b) Which factor influences capillary rise?
- A) Diameter of the tube
- B) Length of the tube
- C) Material of the tube
- D) Temperature of the water

c) Why is land plowed before the beginning of summer?
- A) To increase capillary rise in soil
- B) To enhance soil aeration
- C) To facilitate better drainage
- D) To prepare the soil for planting

Answer :

Final answer:

Tube A with the smallest diameter has the greatest capillary rise, influenced by the diameter of the tube, which affects the height water can rise through capillary action. Land is plowed before summer primarily to enhance soil aeration, aiding plant growth and agricultural processes.

Explanation:

In response to the question about the capillary tubes A, B, and C, we can refer to the phenomenon of capillary action. The answer to which tube has a greater capillary rise is:

  • A) Tube A

This is because capillary action depends on the radius of the tube, and the smaller the tube, the greater the capillary rise. Therefore, among tubes A, B, and C, the tube with the smallest diameter will exhibit the highest rise of water.

The factor that influences capillary rise is:

  • A) Diameter of the tube

This factor affects the capillary action, as explained in texts like FIGURE 11.38 and Figure 10.1.3, showing how water climbs to different levels in glass tubes of different diameters. The smaller the diameter, the higher the water will rise.

Regarding the question of why land is plowed before the beginning of summer, the correct answer is:

  • B) To enhance soil aeration

Plowing the land helps to improve the soil's aeration, which is critical for plant growth. It allows for better air circulation within the soil and helps in various agricultural processes, including facilitating water absorption and root growth.

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