To determine which layer of liquid has medium density among the given options, we need to consider the relative densities of the liquids listed. Based on general knowledge of the densities of these substances:
- Water has a density of about 1 g/cm³.
- Dish soap typically has a density slightly higher than water, around 1.06 g/cm³.
- Milk has a density around 1.03 g/cm³.
- Vegetable oil has a density of about 0.91 g/cm³.
- Rubbing alcohol (isopropyl alcohol) has a density around 0.79 g/cm³.
- Lamp oil (kerosene) has a density around 0.8–0.9 g/cm³.
- Soda has a density similar to water, roughly around 1 g/cm³.
- 100% maple syrup has a density of about 1.33 g/cm³.
- Corn syrup has a density around 1.3 g/cm³.
- Honey generally has a density of about 1.42 g/cm³.
- Beads typically refer to solid objects, so they do not fall into the liquid category.
- Cherry tomato is also a solid.
- Ping pong ball is a solid.
Given this information, the liquids with densities close to each other (medium density) would be milk, dish soap, and soda, while heavier liquids include maple syrup, corn syrup, and honey.
If you are looking for a liquid with medium density, milk or dish soap would fit that description best as they are denser than water but not as dense as syrup or honey.