At a dry bulb temperature of 75 degrees and a wet bulb temperature of 73 degrees, what is the likely relative humidity?

To determine the relative humidity based on the dry bulb temperature and wet bulb temperature, it's essential to understand the relationship between these two measurements. The dry bulb temperature is the air temperature, while the wet bulb temperature reflects the cooling effect of evaporation and is always equal to or lower than the dry bulb temperature.

In this scenario, the dry bulb temperature is 75 degrees, and the wet bulb temperature is 73 degrees. The relatively small difference of 2 degrees between the two indicates that the air is holding a significant amount of moisture. Generally, a small gap between these two temperatures suggests that the humidity is high because it indicates that the air is close to the point of saturation.

Relative humidity is considered very high when the wet bulb temperature is very close to the dry bulb temperature. This is because high relative humidity can lead to discomfort and affects the body's ability to cool down through evaporation. Thus, the correct answer highlights the likely condition of the air, which in this case indicates that the relative humidity is very high due to the small temperature difference.