Lab 4 – Energy Sources and Alternative Energy
Experiment 1: The Effects of Coal Mining
Table 1: pH of Water Samples
Water Sample
Initial pH
Final pH (24-48 hours)
Pyrite
6
4
Activated Carbon
7
8
Water
7
7
POST LAB QUESTIONS
1. Develop hypotheses predicting the effect of pyrite and coal on the acidity of water?
a. Pyrite hypothesis = If pyrite is added to a beaker with 100mL of water, then it will reduce the pH over 48 hours.
b. Coal hypothesis = It activated carbon is added to a beaker with 100mL of water, then it will increase the pH over 48 hours.
2. Based on the results of your experiment, would you reject or accept each hypothesis that you produced in question 1? Explain how you determined this.
a.
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Develop hypotheses predicting the efficiency of solar energy from direct sunlight against the 4 variables tested?
Direct vs indirect hypothesis = If the solar panel is faced towards direct sunlight, then the motor will move faster.
Direct vs reflected hypothesis = If the solar panel is faced towards a reflected sunlight, then the motor will move slower.
Direct vs shaded hypothesis = If the solar panel is placed in a shaded location, then the motor will not move at all.
Direct vs filtered hypothesis = If solar panel is covered with a colored filter, then the motor will either move the same or slower depending on the color.
2. Based on the results of your experiment, would you reject or accept each hypothesis that you produced in question 1? Explain how you determined this.
Direct vs indirect accept/reject =
Direct vs reflected accept/reject =
Direct vs shaded accept/reject =
Direct vs filtered accept/reject =
3. Does increased exposure to the sun’s light produce more current? Explain how you know this based on your data?
Answer =
4. How could you increase the electricity generated by a solar cell during the day, when the
1. Record your hypothesis about what will happen when Biuret solution is mixed with the solutions from test tubes 1, 2, 3, and 4 here. Be sure to use scientific reasoning to support your hypothesis.
b. Coal hypothesis = If the activated carbon is added to the water, it will make the water more acidic.
Based on the results of your experiment, would you reject or accept the hypothesis that you produced in question 1? Explain how you determined this.
John was outside of his house staring at the illuminating sky while he was engineering the broken solar power system. The panels were cracked as a result from the earthquake, so John had recently ordered new panels to replace the dilapidated one. He had to first go up onto the top of the roof which was more than 20 feet up in the air. Then John had to get his sophisticated tools and make sure everything was put in the exact circuit and wires in order for energy to be able to transfer through. He had only installed the panel on one side of house because the other side was covered by some trees which created shadows over the house. Finding the most efficient way to receive energy, he installed the solar panels on one side where the most insolation would
The first step to implementing solar panels in a home is looking at the home’s energy efficiency. It is important for the homeowner to explore their current energy use, and the possible upgrades they can make in order to increase the energy efficiency of their home. Solar energy is not the only option available, which is why it is necessary for the homeowners to see if solar is the best fit for them (“Planning,” n.d.).
It is important to differentiate between solar thermal and solar panel technology because it can be very easy to confuse the two. Solar thermal electric energy generation uses light from the sun to create heat. The heat that is generated from the sun is used to run a heat engine, which turns a generator to make electricity (Novosel and Jurij 2017). The fluid that is heated by the sunlight that is concentrated is usually a liquid or a gas. Some examples of the fluids and gasses used are water, water and salts, air, nitrogen, helium, and so on (Novosel and Jurij 2017). Different types of heat engines range from steam engines to gas turbines. These various types of engines are fairly efficient and can produce hundreds of
Solar power is energy from the sun that is collected via solar panels that can sit on roofs of buildings or in large fields called solar fields. These panels will be placed at the angle where the sun will be able to reflect off it the most and the strongest. In this research how this solar power impacts the coal industry will be explored and explained.
This briefing paper is written to introduce and inform family members about solar energy that can be used in home. They will learn positive and negative side of solar energy with what aspects to consider when installing solar panels.
In today’s time, solar energy has already dominated the market and has drastically changed the way our nation gets its energy supply. In every 50 to 100 square miles of American land, the effects of use of solar energy have become pretty prevalent that even small scale businesses, residences and properties have already showed interest in this new energy trend. It is now considered as one of the world’s cleanest forms of energy and plans to further utilize the use of this form of energy have started to emerge. These plans will target to resolve specific national issues including climate change, water waste disposal, high energy cost and etc. And just like any other forms of energy sources currently available in the market, the use of solar energy has its own advantages and disadvantages.
Solar energy is now a great source of renewable energy. Due to the limited stock of fossil fuel, solar panel systems become more popular day by day. Now Industries, houses and defensive forces are using solar panel systems to generate power. The solar panels generate power from sun radiation. Solar cells are also known as Photovoltaic (PV) cells. When sunlight with a specific frequency hits metal, loosely bound electrons emit from the metal as shown in Figure 1. A potential difference is created in between the cathode and the anode. When the anode and the cathode connect, current flows. Solar panel systems use this mechanism to generate power. Then, generated power is carried out to the battery to store and distribute to the load. The main obstacle for solar panel systems is night and cloudy weather, due to low solar radiation.
efficiency of the solar cells and allow solar energy to become more widespread. Due to the
Someday, our energy sources are going to run out. What will we do? What can we do? Our major source of energy now is fossil fuel. If that were to run out, there must be an alternate way to get energy. Because of this problem, there has been a lot of research going on. Through that research, alternate ways to get energy have been developed. They include wind energy, solar energy, nuclear energy, tidal energy and many more. In this paper I will focus on the aspects of solar energy. I will look at the history of solar energy, cover the advantages and disadvantages of solar energy and then finally I will talk about the concept of solar energy (how it works) and ways that solar energy can be used in your everyday life.
Step motor drivers and step motors rotate the solar panel in the required angle and direction.
Ideally hybrid power is generated using Solar and wind turbine where amount of sunlight falling on the solar panel depends upon the rotation of the earth around the sun. So it is quite difficult to capture sunlight throughout the day. So we have proposed a method to rotate the solar panel according to the rotation of the sun which helps in obtaining solar energy throughout the day. This eliminates the need for rotation of solar
and this report emphasizes on power can be transmitted from solar source to the required load by