Dark energy

thermodynamics, a heat engine is a device/system that uses heat to do work, i.e. it converts heat or thermal energy to mechanical energy. 1.2 How does a heat engine work and its operating principles? For a heat engine to work, it must operate in cycles. Firstly, heat is added into the system. Let the heat added into the system be represented by [Qh]. After that process, some of the energy that were added into the system will be used to do work e.g the materials expanding or increasing in…

Dark matter leaves astronomers and physicists baffled as to what it possibly could be. Scientists design experiments to attempt to figure out what it is, but no one truly knows what composes dark matter. Physicists are so interested in understanding dark matter because it accounts for the formation of the Universe, as observable through studying the distribution of gravity within galaxies (Carnegie). Original attempts at studying dark matter referred to dark matter as baryonic, which is a word…

transport in the disordered organic semiconductors and modeling the electrical characteristics OTFTs [27, 58]. Indeed, the notion of VRH implies that a free carrier either may over a long distance with low activation energy or hop over a short distance with high activation energy [22-25, 58]. A crucial feature of the VRH model is the determination of the density of states (DOS).…

Christopher Nolan's The Dark Knight is one of the best iterations of Batman since the concept of Batman was first created in 1939; the film offers easy to digest bites of philosophy and a deeper look into human nature. At the same time, The Dark Knight provides insight into society's views on mental illness, what society believes mental illness looks like, and society's views toward the justice system. The Dark Knight is the highest grossing Batman film since the first Batman movie (ironically…

Achievement Standard 90936 Credits – 2 Title – Physics in Action Introduction The refrigerator is a common household appliance that is an essential food storage technique in developed countries; it is made up of compartments which are thermally insulated and also has a heat pump which can be mechanical, electronic or chemical. The heat pump is a device which transfers heat from the interior of the fridge to an external environment, this means that the fridge is cooled to a temperature which is…

disturbance of energy. Sound and light are both disturbances in energy, and they both travel in the forms of waves. While sound travels in a longitudinal wave, light travels through a transverse wave. From a perspective of a human, sound and light on earth is very different compared to sound and light in space. These waves have differences in speed, form, shape, and other properties. Despite many of the differences, sound and light are very similar to each other. Light is a disturbance in…

process of the metabolism, but for those who are not, metabolism is the sum total of all the chemical reactions that occur in a living organism. Most people recognize it by how fast they burn off food to create energy. Some people have a fast metabolic rate, others have a much slower energy rate. Today, we are going to measure the metabolic rates of 6 different organisms and situations to test who has a higher metabolic rate than the other. We will test this by seeing how much carbon dioxide is…

to this question, it must be broken down. What are photons? How does gravity affect light? What is a black hole? A photon is typically seen as a particle or wave representing a quantum of light or other electromagnetic radiation. A photon carries energy proportional to the radiation frequency but has zero rest mass. Photons are currently best explained by quantum mechanics. However, it is important to know that photons have both the qualities of waves and particles which is known as…

starts with the cop and the joker in a dark room, the only light lighting up the room is the door light and the lamp right where they are sitting. While the cop is listening to the joker speak only half of his face is fully visible due to the lack of light in the room. It then switches to the joker talking and behind him is very dark, only perk of his face is slightly visible, everything else behind him is not. This adds suspense to the scene that something dark is happening. Right after that…

A museum requires a performant lightning system in order to observe the exhibits in a proper way. Taking a walk in Tate Modern I noticed that the light intensity as well as the light distribution is different in each space: the galleries from the Turbine Hall and the halls. In the galleries there are glowing light boxes displayed on the ceilings. The boxes are made out of glass and a steel frame. In addition to these there are also attached movable light bulbs on the steel skeleton of the boxes.…