Contact

Interestingly, the water falling from today's sky may have dropped last week, last month, last year, or thousands of years ago. That is the biggest recycler ever!

There are four main stages in the water circulation. Evaporate them, concentrate, precipitate and collect. Let's see each stage

Evaporation: When the warmth from the sun raise the water from the sea, lake, stream, ice, and soil into the air and turn it into water vapor (gas). Drops of water vapor stick together to form clouds!

Rainfall: This is the water falling from the clouds in the sky (in the form of rain, snow, hail, or sleeves)

Collecting: This is collected from rain clouds, snow, hail, or sled, collected in the sea, river, lake, stream. Most people will penetrate (soak) the ground and collect as groundwater

The water circulation is moved by the solar energy and gravity. The sun starts the entire cycle by heating all the water on the earth and evaporating it. Gravity causes water to fall to the earth

Thermal contact conduction is a study of heat transfer between contacting solids. A temperature drop is usually observed at the interface between the two surfaces of the contact. This phenomenon is said to be the result of the thermal contact resistance present between the contact surfaces. Interfacial thermal resistance is a measure of interface resistance to heat flow. This thermal resistance is different from the contact resistance because it exists even at the atomic level full interface. Understanding the thermal resistance at the interface of the two materials is important for the study of thermal properties. The interface usually has a great influence on the observed material properties.

Thermal contact resistance is caused by influence of surface roughness, void caused by defect, and misalignment of interface. The gaps existing at the interface are filled with air. Thus, heat transfer is due to conduction across the actual contact area, and conduction (or natural convection) and radiation through the gap and radiation. If the contact area is small like a roughened surface, the gap contributes greatly to resistance. In order to reduce the thermal contact resistance, it is possible to reduce the surface roughness while increasing the interface pressure. However, for electronic devices, these improvements are not always practical or feasible at all times. Thermal interface material (TIM) is a common way to overcome these limitations.

Please contact me and do not settle, please connect! Many of the factors driving us online are related to the desire to contact individuals. There is no problem connecting to other people via electronic media, but connecting alone is not enough to satisfy our needs for meaningful connections. No matter how much we communicate with other people, unless there is sufficient deep connection in our life, it can not fulfill this need. Give yourself and your friends a gift and strengthen your relationship with a truly satisfying link!