3. Robot

Robot Speed Experiment:

After learning how to assemble the robot two weeks ago, last Fridays experiment involved working with the program to measure the distance the car travelled with certain timing power settings. The first task that we had was to measure the circumference of the wheel. Next, we had to put the robot next to a ruler in order to measure the distance that the robot traveled to compare it to the distance recorded by the program. For each setting of power and time we had to do three trials in order to compare each trial to one another. After, experimenting with three different settings and having three trials each setting we had to calculate the margin of error comparing the distance that we observed using the calculator and the distance that the program calculated.

Screen Shot 2015-09-24 at 10.43.06 PM

Looking at the margin of error it seems that we made a mistake with the way we conducted the experiment. The mistake might have been where we put the front wheels of the robot and because of this we were not able to correctly measure the actual distance using the calculator. Our margins or error are pretty high throughout the experiment.

2. Fracking

Fracking: 

Fracking_diagram_jpg_800x1000_q100Fracking is a type of drilling that involves drilling into earth and directing a high pressured mix of water,sand, and chemicals at a rock. This high pressure fractures the rock so that the gas inside of the rock is released. The practice of fracking has been occurring more in the United States in the recent years.

How is fracking done? 

A well is drilled vertically from the surface, then that well is encased in steel to protect any leaking from occurring to the ground water. Once the depth reaches the point where natural gas or oil exists, the well is curved and then they drill horizontally across the rock surface. The pressure of the water/chemicals that are released through that well is strong enough to fracture the rocks and to create cracks where oil and gas can flow from. Once the gas and oil are trapped they are pumped back to the surface. The liquid that is pumped back includes contaminants such as: heavy metals, hydrocarbons, and toxins. This waste is stored at the fracking site then disposed of at off site wastewater treatment facilities.

 

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http://www.bbc.com/news/uk-14432401

Potential environmental impacts of fracking: 

A pollution incident could occur because of a bad fracking process. During the process, chemicals can escape and contaminate the underground water around the fracking site. Research published by Duke University in 2011 showed that drinking water near fracking wells had levels of methane that were very close to what the U.S considers “dangerous and requires urgent action”. Fracking also uses very large amounts of water and the water has to be transported to the site. There are a high number of trucks that are used to transport this water, therefore  just the transportation of the water is badly impacting the environment. A third potential environmental threat is that the process could cause small earthquakes near the site.

Pros:

– Allows access to resources of oil and gas that are very difficult to reach.

– Has brought down gas prices in the U.S.

– Has boosted oil production in the U.S.

Cons:

– Can destroy drinking water supplies.

-Can pollute air.

-Contributes to the greenhouse gases that cause global warming.

– Encourages reliance on fossil fuels.

– Distracting energy firms/ government from investing in renewable sources of energy, because they rely on fracking as a solution.

 

fracking-image

http://corporateeurope.org/climate-and-energy/2013/05/right-say-no-eu-canada-trade-agreement-threatens-fracking-bans

 

Sources:

http://www.bbc.com/news/uk-14432401

https://nicholas.duke.edu/cgc/pnas2011.pdf

http://www.livescience.com/34464-what-is-fracking.html

http://www.what-is-fracking.com

1. The U.S Energy Grid:

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The U.S Energy Grid is a network that is made up of many transmission lines that deliver electricity to  consumers from the suppliers. There are three interconnected systems in the United States that are used to provide electricity in the whole country. There are many high voltage distribution lines involved in the transportation of electricity from the generating stations to the consumer.

The Energy Grid Infrastructure: 

The Energy Grid is made up of four major components: individual generators of electricity, transmission lines, distribution networks, and consumer use. The individual generators of the Energy Grids are the facilities where energy is actually created. There are many different kinds of facilities that create energy, including: coal, natural gas, and hydroelectric. Transmission lines carry the electricity from the generators to the consumers. The distribution network consists of the wires that start at the transformers and end at homes, businesses, and other places that use electricity. The end of the transmission grid is where the consumer actually gets the electricity.

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http://www.ucsusa.org/clean-energy/how-electricity-grid-works#.Vft2dLQ-DVo

Looking at the website of the Infrastructure Report Card Organization they rated the Energy Grid in 2013 with the grade D+. The reason for this low grade is because the infrastructure of the energy grid is very aged, with some parts being in use since the 1880’s. There have not been any investments made to modernize the grid and this costs the US economy millions of dollars for each black out event that occurs. Federal Data confirms that the United States electric grid loses power a lot more often now then ever before. Power outages are occurring because of the outdated energy grid, weather, and climate changes. With population increases and more use of electricity in ones day to day life it is essential to the United States to update the Energy Grid that was built after World War 2.

Smart Grid: 

The Smart Grid is a new kind of electric grid that heavily relies on the use of technology to supply consumers with their electricity. The electric grid would be modernized by adding different technologies to make the transmission of electricity more efficient. The current grid is designed to always operate at peak capacity, however peak capacity is not always needed. There is a two way communication between the consumer and the generator, one central location to control all the devices part of the grid, sensors throughout the grid that are able to constantly provide data on usage.

Pros:

– More efficient transmission of electricity.

– A more reliable system because of the advanced monitoring that would be implemented.

– Quicker restoration of power, if a blackout occurs.

 

Cons:

– It would be very expensive for the U.S to rebuild the smart grid.

– People are able to do many things with technology, who knows what hackers could do to the new technology systems that would be linked to the grid.

 

http://www.eia.gov/energy_in_brief/article/power_grid.cfm

Energy

http://www.ibtimes.com/aging-us-power-grid-blacks-out-more-any-other-developed-nation-1631086

http://www.ucsusa.org/clean-energy/how-electricity-grid-works#.Vft2dLQ-DVo

http://energy.gov/oe/services/technology-development/smart-grid