Surface energy

The sun radiates energy in a wide range wavelength. Ultraviolet rays reach the earth surface in wavelengths that range between 290 and 400 nm. The impact of the wavelength to the surface of the earth is determined by size of the wavelength. When the wavelength is short, it causes a more energetic radiation that in turn creates more harm to the surface. Ultraviolet light is a form of electromagnetic radiation that is invisible to the human eye. The sun is a source of radiation that forms the full…

There are many definitions of thermal comfort, which depends on the aims and expectations of those who defined it (Chappells, and Shove, 2004). Jiao (2010) stated that, the rate at which human body gain and lose energy, and also the state of comfort is satisfactory once all heat flow in and out of the body are in equilibrium. Also, (ASHRAE 2004), described it as “the state of mind that expresses satisfaction with the surrounding environment.” This definition highlights subjective and…

to the Scan Velocity and Beam diameter. The observations of the model can be summarized as below: As Laser Power increases the LAZ Depth of workpiece surface will also increase. This is because the heat input to the workpiece is increasing due to increase in Energy Density. As the Scan Velocity decreases the temperature on workpiece surface will increase. This is because with the decrease in Scan Velocity, the Power Density increases, those results in more heat input. As the Beam…

across the membrane ~ the distance travelled – this places an upper limit on cell size and functions as a resistance factor; distance travelled is indirectly proportional to the rate of diffusion ~ temperature – higher temperatures increase the kinetic energy of the molecules, therefore increasing…

degrees Kelvin. At this pivotal temperature, the individual hydrogen protons are unable to repel each other any longer, and collide into each other forming a helium atom. This process not only forms a higher element, but also releases energy. It is this energy that we see as sunshine or light, and can feel as heat. By the time it has reached this milestone, the star has been compressed down to only 1 Sol (the size of our sun), an astonishing 10 million years since we were first able to see…

the sun together. These also call things that are called solor flares. Theses flares release energy during magnetic storms which allow sunspots to be visual. Sunspots are lines and they twist just like tornadoes like they would do on earth. Deep into the suns core there is a nuclear fusion which reacts with the hydrogen and helium which constantly pushes together to produce heat. Which also generates energy for things such as solor…

Pluto’s outer surface. Depending on the wavelength, most of the light waves are absorbed into the planet, the remaining light waves, which happen to be a mixture of blues, are the ones that we see. When we use polarized lenses, we are able to see certain characteristics of the planet from the filtering of certain light waves. The dwarf planet Pluto absorbs all colors except certain blues. These are the colors that humans are able to see. The colder an item is, the lower amount of energy it has.…

The structure and function of the skin regulates the body temperature. The skins main function is to cover the outside of the body and preventing anything bad from entering into it. When skin cells shred off the surface layer new ones will form. The skin not only forms a waterproof layer and it helps make sure that heat doesn’t leave the body. It has a major role in the homeostatic regulation of the core body temperature and is said to be part of the nervous system due to its sensitivity.…

the bounce dependent on the height of a ball being dropped? Independent Variable: The height of release of the tennis ball Dependent Variable: The peak height of the bounce Controlled Variables: • The mass of the tennis ball • The tennis ball • Surface the ball is dropped on • The initial velocity…

1. Redox Catalyst Catalyst is defined as a substance that increases the rate of a chemical reaction without changing its chemical composition and affecting the standard Gibbs free energy, by lowering the activation energy of a chemical reaction. It does so by providing an alternative reaction pathway. In redox reaction, the key chemical event is the net movement of electrons from one reactant to the other. The oxidation state of atoms are changed. Transition metal is used as redox catalyst due…