# Thermal energy and temperature relationship to humidity

### Thermodynamic temperature - Wikipedia

Temperature is the measure of thermal or internal energy of the molecules within In the atmosphere, temperature is related to volume, pressure, and density. Temperature is the average kinetic energy of the molecules, while humidity describes the amount of water vapor in the air. At higher temperature, air can hold. Owing to the fact that the (average) kinetic energy of an atom or molecule is The quantitative relationship between heat transfer and temperature change.

The highest recorded dew point stands at 95 in Saudi Arabia in High humidity and heat means more water in the air, which can carry odor molecules further, leading to considerable stench in summer around bacteria sources such as garbage.

Exercise regimens need to take into account temperature and humidity to avoid health risks. This is because the human body relies on evaporation of sweat to lead to cooling.

If the air is both hot and humid, the body cannot evaporate the sweat as effectively, which can lead to dehydration, overheating and even death. Like in arid conditions and high heat, hydration becomes key. Recent studies reveal connections between humidity, temperature and public health.

Temperature and humidity directly influence influenza virus transmission in temperate regions of the world.

Influenza activity increases in winter in each hemisphere's temperate zones. Flu virus thrives when outdoor temperatures grow colder. While winter relative humidity is higher in winter, indoor relative humidity is much drier due to heating.

The exposure to cold outside air and dry inside air increases flu virus transmission.

Research indicates aerosolized influenza virus is more stable at lower relative humidity. Every time molecules collide, kinetic energy can be transferred. When the two systems are in contact, heat will be transferred through molecular collisions from the hotter system to the cooler system. The thermal energy will flow in that direction until the two objects are at the same temperature. When the two systems in contact are at the same temperature, we say they are in thermal equilibrium.

Zeroth law of thermodynamics: Defining thermal equilibrium The zeroth law of thermodynamics defines thermal equilibrium within an isolated system. The zeroth law says when two objects at thermal equilibrium are in contact, there is no net heat transfer between the objects; therefore, they are the same temperature. Another way to state the zeroth law is to say that if two objects are both separately in thermal equilibrium with a third object, then they are in thermal equilibrium with each other.

It helps us determine what to wear and what outdoor activities to do. Temperature controls planting dates and the growth of plants as well as insect pests and crop diseases. Temperature is a measure of how much internal energy an object or gas has. For example, a gas with fast-moving molecules feels "hot" because when that gas touches something that is cooler, some of the energy of the hot gas is transferred to the cooler object and the cooler object responds by warming up.

### Heat and temperature (article) | Khan Academy

You sense the transfer of energy as heat. When you touch something that has a lower temperature than your hand, you sense it as being cold because energy leaves your hand and is transferred to the colder object. If there are two objects with different temperatures, energy always flows from the warmer object to the colder object.

In the atmosphere, temperature is related to volume, pressure, and density. Temperature is inversely related to density but directly related to pressure and volume. This means, for example, that when temperature increases, density decreases, and volume and pressure of the gas also increases. So air that is warm and dry will tend to rise when surrounded by cooler air because warm air is less dense than the cooler air around it.

Temperature Scales There are three different scales frequently used to measure temperature. Fahrenheit, the most commonly used scale in America, was developed in the early s and is the oldest of the three scales we still use.

## Temperature

The lowest temperature G. Daniel Fahrenheit was able to reach using a combination of salt, ice, and water was set as zero degrees F in his scale. The second oldest scale is the Kelvin scale, developed by Lord Kelvin in the mid s. This scale begins at absolute zero and has no negative numbers.

Absolute zero is when all molecular motion stops, which is not known to exist anywhere in the universe.