Why is NO2 not a greenhouse gas? Neither nitric oxide nor nitrogen dioxide are greenhouse gases, although they are important in the process of creation of tropospheric ozone which is a greenhouse gas. Because of this, there is general agreement that the atmospheric sources and sinks of nitrous oxide are difficult to bring into balance. […]
What does a unification fight mean?
What does a unification fight mean? The unified champion is defined as a boxer that holds at least two world championships of major sanctioning bodies (WBA, WBC, IBF or WBO) in their respective division. How do you use unification? An extreme cultural divide was overcome with a unification of nations around the beer tap. The […]
What is a disadvantage of hydrogen fuel cells?
What is a disadvantage of hydrogen fuel cells? There are disadvantages to using hydrogen-oxygen fuel cells in cars. These include: hydrogen is in the gas state at room temperature and pressure, so it is difficult to store in the car. fuel cells and electric motors are less durable than petrol engines and diesel engines, so […]
What is Peritectoid?
What is Peritectoid? In binary systems, the peritectoid is the transformation of two solid phases in an alloy system, forming a new phase. These reactions happen in a similar way to peritectic transformations (see Peritectic), however, they only occur in the solid state. Is Cementite FCC or BCC? The alpha phase is called ferrite. Ferrite […]
Does salt increase water density?
Does salt increase water density? Density is the mass of a material per unit volume. Adding salt to the water increases the density of the solution because the salt increases the mass without changing the volume very much. When enough salt is added to the water, the saltwater solution’s density becomes higher than the egg’s, […]
What is the source of energy for the life in deep sea ocean trenches where sunlight does not reach?
What is the source of energy for the life in deep sea ocean trenches where sunlight does not reach? Answer: Instead of sunlight, vent life relies on hydrogen sulfide – more commonly known as rotten egg gas and toxic to most land-based life. In a process called chemosynthesis, specialized bacteria create energy from the hydrogen […]
What are general fire precautions?
What are general fire precautions? The term ‘general fire precautions’ (GFPs) is used to mean the measures in places of work to reduce the risk of fire and its spread on the premises, and include: providing arrangements for action to be taken in the event of a fire on the premises, including: the instruction and […]
What are the three main principles of usability testing?
What are the three main principles of usability testing? Main principles of usability testing are: defining the goal, hypothesis, research questions and creating scenarios accordingly. preparing requisites based on scenarios (prototypes – never waste time creating omnicapable prototype, these can be only worth it as design presentations for clients, but not for UTs. How do […]
Can copper wire be used as a heating element?
Can copper wire be used as a heating element? Copper is a good conductor of heat. This means that if you heat one end of a piece of copper, the other end will quickly reach the same temperature. Most metals are pretty good conductors; however, apart from silver, copper is the best. Why is copper […]
What cycle does a refrigerator work on?
What cycle does a refrigerator work on? Air cycle refrigeration works on Reversed Carnot cycle and Bell Coleman cycle. Air is compressed and then heat removed, this air is then expanded to a lower temperature than before it was compressed. . Where is refrigeration used? Refrigeration has many applications, including household refrigerators, industrial freezers, cryogenics, […]