UHS MDCAT Past Papers 2013 with Keys | Fully Solved Download

Hello students, In this post, we are going to provide you the UHS MDCAT Past papers of 2013. This is the completely solved pdf of UHS past papers you can get these past papers in pdf form in the given below link. Just scroll down below and you will get it for free.

Energy can be generally classified as non-renewable and renewable. Over 85% of the energy used in the world is from non-renewable supplies or sources. Most developed nations are dependent on non-renewable energy sources such as fossil fuels and nuclear power. These sources are called non-renewable because they cannot be renewed. Coal is the most abundant fossil fuel in the world with an estimated reserve of 1 trillion metric tons. Coal is formed slowly over millions of years from the remains of ancient plants and animals. Different types of coal resulted from differences in pressure and temperature that developed during formation. Softest coal about 50% carbon, which also has the lowest energy output, is called lignite. Currently, the world is consuming coal at a rate of about 5 billion metric tons per year. The main use of coal is for power generation because it is a relatively inexpensive way to produce power. In addition to electricity production, coal is sometimes used for heating and cooking in less developed countries and in rural areas of developed countries. crude oil or liquid Petroleum is a fossil fuel that is refined into many different energy products. oil forms underground in rocks such as shale. Most known oil reserves are already being exploited, and oil is being used at a rate that exceeds the rate of discovery of new sources. The energy consumption rate continues to increase and no significant new sources are found. Then oil supplies may be exhausted in another 50 years or so. Despite its Limited supply, oil is a relatively inexpensive fuel source.

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