The molecules in warmer air move faster, which means they have more energy. This extra energy allows the molecules to hold more water vapor. Also at higher temperatures average kinetic energy of the water molecules increases, allowing them to overcome the attractive forces and remain in a gaseous state.

A hygrometer is an instrument used to measure the humidity (how much water vapor it contains) of air or some other gas. 

Dry bulb temperature measures the temperature of the air in the surrounding environment. A wet bulb temperature thermometer whose bulb is wrapped in a wet cloth measures the humidity of the air and will always show a reading below the dry bulb temperature. At dew point (100% saturated) temperature both wet-bulb and dry-bulb temperatures show the same reading.

Yes, humidity, and temperature can affect the comfort of the human body. When the air is humid, it is more difficult for the body to cool down through sweating as sweat evaporates more slowly in the humid air. A general guideline for indoor comfort is typically in the range of 68 to 76 degrees Fahrenheit (20 to 24 degrees Celsius). Relative humidity levels between 30% and 60% are generally considered comfortable for most individuals.

Convection is a heat transfer process that occurs in fluids (liquids and gases). In solids heat transfer takes place through Conduction.

When air is at 100% humidity, it is saturated with water vapor. This means that the air cannot hold any more water vapor, and any additional water vapor will condense into liquid water. Therefore, the wet-bulb temperature is equal to the dry-bulb temperature.

Warmer air can hold more water vapor than cooler air. This is because the molecules in warmer air are moving faster, and they have more kinetic energy. This allows them to hold more water vapor. In warmer air water molecules also have more kinetic energy and stay in vapor form

Conduction is a heat transfer process that occurs when heat is transferred from one molecule to another without any noticeable movement of molecules. This happens because the molecules in a material are constantly colliding with each other.

The X-axis of a psychrometric chart contains the dry-bulb temperature. The dry-bulb temperature is the temperature of the air as measured by a standard thermometer. The dry-bulb temperature is important because it is a measure of the amount of heat energy in the air.

In Psychrometric chart, the upper curved boundary represents dew point temperature line (saturated air or 100 percent moisture-holding capacity).

If a pot of water is heated, the heat energy that causes water to raise in temperature without converting to vapor is called sensible heat

Specific volume is the volume of a substance per unit mass. Density is the mass of a substance per unit volume. The reciprocal of density is the specific volume.

The wet bulb temperature can be used to calculate the total heat content of a pound of air. Enthalpy is the total heat content of a substance, including the sensible heat and the latent heat.

Horizontal lines placed parallel to the X-axis of a psychrometric chart represent constant moisture content.