Clouds, States of Matter and Density

Cumulonimbus clouds are characterized by their towering structure and anvil-shaped tops, often reaching high altitudes. These clouds are associated with severe weather phenomena, including thunderstorms, lightning, and heavy rainfall. Their vertical development is a result of strong updrafts, which can lead to intense weather conditions. Cumulonimbus clouds are a significant indicator of instability in the atmosphere, making them a key player in storm formation.

To find the volume of a rectangular prism (in this case, a cuboid), you multiply its length, width, and height. Here, the length is 5 cm, the width is 4 cm, and the height is 3 cm. Calculating the volume gives: 5 cm × 4 cm × 3 cm = 60 cm³. Thus, the volume of the cuboid is 60 cm³.

Evaporation is the process in which a liquid transforms into a gas when molecules at the liquid's surface gain enough energy to overcome intermolecular forces. This typically occurs at temperatures below the boiling point and can happen at any temperature, allowing liquid to gradually change into vapor. Factors such as temperature, surface area, and air movement can influence the rate of evaporation, making it a common phenomenon in everyday life.

Surface tension is a physical property of liquids, particularly water, that arises from the cohesive forces between molecules. Water molecules are attracted to each other due to hydrogen bonding, creating a strong inter-molecular force at the surface. This results in the formation of a "skin" that allows objects denser than water, like a needle or a water strider, to float or move on the surface without sinking. Surface tension is essential in various natural phenomena and plays a crucial role in processes such as capillary action and the behavior of bubbles.

To find the volume of a cylinder, the formula used is V = πr²h, where r is the radius and h is the height. Substituting the given values, r = 3 cm and h = 8 cm, we calculate: V = 3.14 × (3 cm)² × 8 cm = 3.14 × 9 cm² × 8 cm = 3.14 × 72 cm³ = 226.08 cm³. Thus, the volume of the cylinder is 226.08 cm³.

Cohesion refers to the attraction between water molecules themselves, allowing them to stick together, while adhesion is the attraction between water molecules and different materials. Therefore, the statement incorrectly defines cohesion and adhesion, making it false.

In solids, particles are closely packed and primarily vibrate in fixed positions, giving solids their definite shape. In liquids, particles are still close but can slide past one another, allowing liquids to flow and take the shape of their container. In gases, particles are much farther apart and move freely and quickly, resulting in no fixed shape or volume. This description accurately captures the distinct behaviors of particles across the three states of matter.