Force, Work and Energy

Isaac Newton, probably one of the greatest scientists of all time, formulated the basic laws of motion. His first law, the law of inertia states that an object will remain at rest to at a steady motion in a straight line unless an external force is applied. Because of friction and gravity this law is not obvious on Earth, but in Space it is. Aristotle thought the natural state of objects was at rest, Galileo questioned this and Newton disproved it.

Newton’s second law of motion states that force is equal to mass times acceleration. Force is set by the power level so for a mass that does not change, if you increase the force acceleration goes up. And if you increase the mass, acceleration will go down.
Acceleation vs mass

acceleration vs force

When a force is applied to change the speed or direction of an object, work is done against inertia. Inertia is the property of an object to stay in rest or in constant straight line motion. To change energy we apply work. During our experiment, this happened when we lifted the weights to change the mass. Work is equal to the force times distance. Work and energy are related. When work is done there is a change in energy since energy is the ability to do work (Joules).

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Battery Discharge is directly proportional to energy. Some of that energy was lost during the experiment by the turning of the wheels also known as frictional losses. The kinetic energy was transformed to potential energy which is energy that a body has and has not spent. Power equals work divided by time. The greater the power, the faster it will go.

battery discharge

power watts vs power level

Hydro-Fracking

Natural Gas Hydraulic Fracturing also known, as hydro-fracking is a technique in which a pressurized liquid fractures rocks. The process involves injecting high pressured ‘fracking fluid’ (mainly water) into a borehole to create cracks in in the deep-rock formations therefore freeing more easily natural gas, petroleum and brine. This technique however is highly controversial in many countries because while it provides economic benefits and easier access to hydrocarbons, the environmental impacts it causes outweigh everything else. Such impacts include risks of ground and surface water contamination, air and noise pollution, and potentially trigger earthquakes along with consequential hazards to public health and the environment.

fracking-happeningIn early 1987, the United States Environmental Protection Agency (EPA) concluded that hydraulic fracturing can contaminate and has contaminated groundwater. According to EPA former employees, evidence of the negative impact of fracking was systematically removed from congressional reports to support the energy industry. Therefore the growth of hydraulic fracturing in the United States and the continued exposure to the many chemicals involved in energy development is expected to increase over the next few years, and with uncertain consequences.

Potential sources of for ground and surface water exposure to toxins and toxicants include: 1) the drilling and fracturing phase; 2) improper treatment of wastewater, including spills during transport; and 3) failure of cement wall casings. Some of the toxins released from this process have cause poor health outcomes such as cancer, blood disorders, nervous system impairment, and respiratory issues. Miscarriages and stillbirths have also been associated with these toxins.

There have been several reported cases from families affected by hydro-fracking. For example: In 2008, Charlene Parish of Bee Branch from Arkansas reported contamination of drinking water during hydraulic fracturing of a nearby natural gas well owned by Southwestern Energy Company. Her water smelled bad, turned yellow, and filled with silt.

Also in 2001, two families in Colorado reported a water well blow-out and contamination of their drinking water during hydraulic fracturing of four nearby natural gas wells owned by Ballard Petroleum, now called Encana Corporation. Their drinking water turned gray, had strong smells, bubbled, and lost pressure. One family reported health symptoms they believe are linked to the groundwater contamination.

References:

https://en.wikipedia.org/wiki/Environmental_impact_of_hydraulic_fracturing_in_the_United_States

http://switchboard.nrdc.org/blogs/amall/incidents_where_hydraulic_frac.html

https://en.wikipedia.org/wiki/Hydraulic_fracturing

 

DuPont’s Worst Nightmare

Rob Bilott, a corporate defense attorney, ended up taking on an environmental suit against the DuPont chemical company after receiving a call from a farmer, Wilbur Tennant, who claimed his cows were dying left and right and it was all because of DuPont. Wilbur claims that it all started when his brother Jim and wife sold 66 acres of the family’s land to DuPont in the early 80s. The company wanted to use the land for a landfill for waste from its factory. It was later on called Dry Run Landfill named after the creek that ran through it, coincidentally it was in the same creek that flowed down the pasture where the Tennants gazed their cows. No longer after finalizing the sale, the cattle began acting deranged and not like themselves. Wilbur video taped and photographed what was going which included: green water with bubbles on the surface running into the creek, cows with stringly tails and malformed hooves wobbling like drunks, a dead black calf lying in the snow with one eye a brilliant chemical blue. He had lost one hundred fifty-three animals on his farm and there was no one around to help him. Veterinarians refused to return his calls in fear of getting involved with the case. It was absolutely brutal, inhumane and simply evil what was going on in that farm and Bilott realized it and decided to take on the case.

After filing the first federal suit against DuPont, their in-house lawyer informed that the E.P.A would commission a study of the property conducted by three veterinarians chosen by DuPont and three by the E.P.A. The report simply blamed the Tennants for not knowing how to take care of their cattle and claimed that DuPont was not responsible whatsoever. However after digging in deeper, Bilott found a letter DuPont had sent the E.P.A mentioning a substance at the landfill called “PFOA” which after thorough research he found out is a soaplike agent used by the technology conglomerate in the fabrication of Scotchgard. He couldn’t find any more information about this substance however, so he requested a court order to force DuPont to hand in their files related to the substance which in despite of their efforts to protest against it, the order was granted.

It was found that the whole story began way back in the 50s when DuPont purchased PFOA for use in the manufacturing of Teflon. It was not classified as a hazardous substance but 3M, the company who sold them the substance, clearly sent DuPont recommendations on how to dispose it which was to be incinerated or sent to chemical-waste facilities. Little by little DuPont started being less cautious and pumped hundreds of pounds of PFOA into the Ohio River. For more than four decades DuPont conducted secret medical studies on the substance, each different study showing a way in that PFOA was a deadly substance and how DuPont was actively letting it be exposed to hundreds of human beings and disclosing the information they had from the public.

DuPont basically forgot everything they knew about ethics, laws and doing the right thing and thought in terms of profit and revenue. They had the opportunity to switch from the PFOA to a less toxic substance instead but decided it was too much of a risk where they could lose the $1 billion in annual profit that they receive from products manufactured with PFOA. They made the mistake of thinking in the short-term losses and how changing substances would mean a step back in their business at that moment. But didn’t quite think through the amount of law suits and deaths that could come in the future and how it hurts their brand and image which could in fact cause the end of the company altogether.

Bilott faced a legal problem that prevented him from claiming that 70,000 people had being poisoned by PFOA when government regulations didn’t recognize it as a toxin. But in 2004, DuPont agreed to install filtration plants in the affected water districts and pay $70 million that would fund “a scientific study to determine whether there was a ‘‘probable link’’ between PFOA and any diseases. If they found any link, DuPont would pay for medical monitoring of the affected group in perpetuity but until then no one could file personal-injury suits against them.

Six years passed where Bilott got sick and there were still no findings. It wasn’t until the end of the 7th year that they found the “probable link” between PFOA and kidney cancer, testicular cancer, thyroid disease, pre-eclampsia, ulcerative colitis, and high cholesterol. It took them too long however; it wasn’t until 2013 that they ceased production of PFOA.

Those are years and years of drinking contaminated water. Chances are most of us in 2016, have PFOA in our blood and we get it all the way from the water we drink, to our parent or lover’s blood, to the food we eat etc. It is amazing how agencies did nothing for so many years and how DuPont got away with it for so long never admitting to what they were doing and fighting everyone they hurt along the way. It is a case that truly opens our eyes and show how greedy, close-minded, selfish people can be and how every decision we make affects not only ourselves but every single person on the planet. And to think that this is only one of thousands of barbaric cases that have occurred throughout the years.

Water Crisis in Flint, Michigan

This past November 2015, Flint residents decided they have had enough; they filed a class-action lawsuit on behalf of the victims of high levels of lead in their city’s water against the governor Rick Snyder, the state of Michigan, the city of Flint and other state and city officials. The health effects listed in the class-action suit include: skin lesions, hair loss, high levels of lead in the blood, vision loss, memory loss, depression and anxiety. After all of the complaints it was labeled a public health emergency. “The city ordered public schools to stop running water for taps and water fountains”, according to WEYI-TV, another CNN affiliate. Government agencies passed out more than 6,000 water filters, said Nick Lyon, director of the Michigan Department of Health and Human Services.

There have been some accusations happening against the EPA for covering what it knew about the misconduct while Flint residents continued to drink the polluted waters. During a court hearing they discussed Michigan’s Department of Environmental Quality and the EPA’s failures to deal with the lead from corroded pipes that leached into city homes. In defense of the EPA, their water official, Joel Beauvais, said the Department of Environmental Quality first said corrosion treatment wasn’t needed for the river water, then “resisted” demands to follow rules requiring it. But Beauvais found himself later on, having no answer to questions regarding criticism from lawmakers who asked why the EPA didn’t tell the public after one of its workers reported high concentrations of lead in a Flint home in February 2015.  Lee Anne Walters, the mother of a child who is know suffering from anemia and learning disabilities because of the lead poisoning recalled her lonely crusade for answers when she called the EPA to her house.  “The city and MDEQ still told people the water was safe, while the EPA watched in silence,” she said.

Sadly though, 126 days later and counting, and the lead pipes that poisoned the water still sit on the ground. They have been offered help and donations of bottled water from all corners but still the source of the problem which are the pipes yet sits untouched. Flint Mayor Karen Weaver has kept up a constant drumbeat calling for the replacement of the pipes but, so far, the state has failed to heed those calls. It’s been estimated that it will cost upwards of $60 million to replace the lines and it may be a pretty big number but it needs to be done. The pipes need to be replaced.

References:

http://www.cnn.com/2016/01/05/health/flint-michigan-water-investigation/

http://www.nbcnews.com/storyline/flint-water-crisis/house-panel-chair-vows-hunt-down-official-behind-flint-water-n510411

http://www.mlive.com/news/flint/index.ssf/2016/02/months_mount_on_flint_water_cr.html