Explanation:
<u>Hydrogen is used as fuel in automotives . It yields very high energy on combustion. It has great energy density by weight but poor energy density by volume. This is because Hydrogen is a very light gas, approx. 11 times lighter than normal air.</u> Hence it would require large volume of container to store it at normal atmospheric pressure conditions. That is why it is compressed using external energy to increase its density and decrease the volume needed for storage . So it becomes portable.
Only problem in this approach is that it utilities about 20% energy of the Hydrogen's energy potential to compress it . But this method proves cost effective as it reduces the overall weight of the container and also gives space to vehicles .
Cost- benefit analysis is the method that is mostly used by businessman to see whether they have taken correct decision or not.
Explanation:
Suppose a doctor has suggested two same type of medicine to the patient. One of the medicine is expensive and the other medicine is less expensive. But both the medicine will have same utility that is both will be used as a preventive measure for the sickness. One extra quality that the expensive medicine is having is that it will provide the patient to access to more application.
Using the cost benefit analysis it will be beneficial if the patient go for the cheaper medicine because the main aim of the patient is to cure the disease. Extra application is not required. The cheaper medicine will be budget friendly as well.
The cost-benefit analysis is basically known as the evaluation method because it helps the company to identify the best possible option that will give a good return on investment.
The correct answer is D. Four.
Explanation
The map shows a relief map of an area. The relief maps are characterized by having contour lines that are a representation system composed of different shapes or lines that represent cutting planes of the surface depending on their height, these are characterized by keeping distance between them, and depending on this it can know if the terrain has a more or less steep incline. Also, contour lines allow us to recognize where the peak of a mountain is since this being the highest part is represented by a circle or undefined shape that represents the last contour of the plane. Therefore, it can be said that the map has four peaks because it has four circular shapes that allow us to recognize the highest points on the map, that is, they represent the peaks. Therefore, the correct answer is D. 4
I think 2,5,1 but im not sure
