5.1 Homework PG178 Questions: 2, 3, 5, 8, 9 2. Classify each of the following observations as an example of either a chemical or physical property a. Liquid nitrogen boils at -198˚C This is a physical property because it is a matter of changing state. b. Propane leaking from a damaged tank, ignites easily This is a chemical property because it is flammable. c. Silver jewelry tarnishes (darkens) in air This is a chemical property because the silver becomes dark because of oxygen d. Spilled oil generally floats on the surface of water This is a physical property because it does not mix to create a new substance e. Meat darkens when it is heated on a grill This is a chemical property because something new is created.…
Nitrogen forms a number of different compounds with oxygen, depending upon the experimental conditions. This type of observation concerning the behavior of matter is summarized by…
Alternative energy sources are those that are different from the typical sources we use today such as fossil fuels, nuclear and falling water; Alternatives can be solar, geothermal, hydrogen, gas, fusion, or any other energy source that a new technology could utilize (Tillery, Enger, & Ross, 2009, p. 69). Active Solar application is an…
Are there problems with solar? o Costs o Efficiency o Need access to sun o Land use impacts o Environmental costs in production and transportation Costs • Efficiency of electricity generation Land use impacts o “With today's commercial systems, the solar energy resource in a 100-‐ by-‐100-‐mile area of Nevada could supply the United States with all of its electricity. If these systems were distributed to the 50 states, the land required from each state would be an area of about 17 by 17 miles. This area is available now from parking lots, rooftops, and vacant land.…
Peter Maloney writes in his article, " Environmentalists Against Solar Power" that solar power projects are facing major scrutiny, not from the coal or oil industry, but from environmentalists.…
b.) In Box X, Compound 2 is represented because of the stronger intermolecular forces present (Hydrogen-bonding intermolecular forces), therefore creating a higher boiling point (78ᵒ).…
Availability of fossil fuels is a considerable factor when dealing with various energy sources. Coal is non-renewable and it is estimated that at least 40% of the world’s electricity comes from coal, and in 2005 Coal power produced 49.7% of the United State’s electricity supply. The consumption of coal is expected to increase 71% between 2004 and 2030, highly motivated by developing countries that use coal to generate about 75% of their power. There are limited stocks of coal remaining, they will be entirely depleted this millennium if we continue to burn coal in the future at the same rate we are today. Solar energy, on the other hand requires the use of the sun which is renewable and will potentially never run out regardless of how much it is used. Therefore, solar energy seems to be the better choice.…
In today’s world, which most definitely has an environmentalist mindset, there seems to be a feud or conflict between those in favor of fossil fuels and those in favor of alternative energy, i.e. solar energy. It seems so disputed and heated that you could compare it to the rivalry in our political system among democrats and republicans. Each side wishes to strengthen our communities, states, nation(s), and world politically and environmentally for the generations to come but can never seem to come to an agreement. Despite all these disagreements and arguments something does need to happen in order to stop pollution by way of fossil fuels. Fossil fuels do not have to be thrown out of the equation altogether but one day technology will reach the point where alternative energy is king. The many who are in favor of fossil fuels in no way like to hear a statement such as that but it is inevitable that alternative energy will take over because of countries like the US and the rest of world’s vast advancement in science and technology. Much evidence shows that solar energy will have a positive impact on the economy and the environment at the national and local levels.…
Furthermore, renewable energy is a very niche market. It makes up only 8% of the total energy industry. SolarWorld’s practice, active solar technology, occupies just 1% of the total renewable energy due to its high cost and capital investment. This leaves a big hole for threat of substitutes such as coal, nuclear or natural gas energy, which are mostly the primary choice before renewable energy.…
Sun had been the main source of energy since the Earth was born. It is the source for primary production. People have been using the energy of Sun in various ways. Apart from these usages, people have finally learnt to generate Solar Power from the solar energy.…
Solar Panels help with the growth of the economy and its economic growth is a major factor in terms of the world energy consumption. Economic growth has fluctuated in its energy demand specifically in recent years by 1.1 percent in 2009 and growing by 4.9 percent in 2010, and then growth of 3.8 percent in 2011 and 2.8 percent in 2012. (EIA U.S. Energy Information Administration, 2013)…
Solar energy is a term that usually means the direct use of sunlight to produce…
When all of our natural fossil fuels are low or gone, solar energy will be one of the leading sources of energy that we will need in the future.…
Solar panel is one of the most important renewable energy. There are some positive sides of using solar panel. First of all solar panel has inexhaustible production of energy. From sun the earth gets infinite supply of solar energy. It gives an incredible source of energy within 1 minute to produce 1 year energy for the world. "In one day it provides more energy than our current population would consume in 27 years" (DMCA,2005). The solar panel does not pollute the environment. It is clean and friendly renewable source of energy. As the system can fix into existing buildings so it does not affect land use. Solar panel is greatly reduce contributing to global warming. Human activity is overloading worlds atmosphere with global warming, which creates heats, drive up the worlds temperature. It comes from photovoltaic effect which creates energy, as it does not pollute environment, gives health and safety benefits and is influencing people worldwide. Solar…
“I’d put my money on the sun and solar energy,” stated Thomas Edison. Many people, including Thomas Edison, understood the value of solar energy. The use of solar energy has dated back to 700 B.C. Expenses for solar energy products are exceedingly high. Maintenance of solar powered utilities is virtually nonexistent. Solar products tend to be efficient in their work to make a clean planet. The function of a solar panel is to transform light into electricity. Solar panels can be used to power several different pieces of equipment. Solar energy can help reduce pollutants and create a healthy environment for everyone to live in.…